Furnace Blower Turns On Randomly

It begins its power-on cycle normally. Why won't my furnace blower turn on? I have a Coleman Presidential 2 gas furnace in a mobile home. 12 VDC only model -The system switch is a single pole single throw toggle switch and has two positions (ON and OFF). The Blower motor on my AC unit turns off at random times while the outside unit continues to run which is causing the coil to freeze up. Here are a couple of common reasons why you may hear loud banging or popping coming from your furnace:. The limit switch is designed to detect the temperature inside of the furnace. • If your thermostat only controls the furnace and has a switch to turn the furnace on/off, switch to ON position. If you do not have the ability to do these operations safely, do not attempt them. Tip: If your furnace has a standing pilot (a pilot that burns all the time), turning off the gas to the furnace when the heating season is over will save you as much as 5 percent per year on your gas bill. If this applies to you, then your furnace uses a "media" filter, which fits in a thick air cleaner enclosure. I turn the heat on on my thermostat and I hear 2 clicks for sure. My blower/heating system has developed a little glitch where it turns itself on and off while blowing air at any speed setting. Initially, the burner will turn off and then the blower would turn off as well. Replaced it with a spare and it was fixed. If your thermostat only controls the furnace and has a switch to turn the furnace on/off, switch to ON position. The blower is supposed to turn on prior to the burners igniting. The heating elements are working because I can feel the heat from the furnace but the motor does not. should be clearly labeled with a gas furnace sticker. If the blower is running but no heat is coming out, replace the filter. 2 days ago · Alright, in addition to saving energy by turning down the heat at night, someone with a forced air furnace, also prolongs the life of that furnace by having fewer starts/stops of the blower motor. The sail-switch is a safety device that turns off the propane if the furnace loses 12V power (no 12V power = no fan = no way for the furnace to cool itself off, so the gas still burning in a furnace that has lost power could be a dangerous situation, hence the sail-switch). 1 - Low Airflow. Your furnace may also give you fault codes related to draft inducer blowers. This is preventing a new heat cycle from beginning. In some of the installations described above, the blower of the conventional furnace is used to help distribute the heat throughout the house. And make sure your furnace doesn’t cause your gas water heater to backdraft (Photo 14). In case the furnace turns off when the thermostat is turned to off, a probable reason is a thermostat that is not working properly. * Locate and turn on the furnace switch. If the furnace rattles when it turns off, this could be the sound coming from the metal parts of the furnace cooling down. Filter dirty. Adjust or replace belt. Air conditioner is turned off but fan keeps running. However that becomes short lived. If the blower comes on then that confirms several things: 120 VAC to furnace Blower door switch is OK 24 VAC is OK The R and G wire at least are intact Older HW Smart Valves had problems with the main molex connector plug. Why Does My Furnace Keep Turning Off And On? Furnace problems are quite common in cold winters. Running a furnace fan constantly also has drawbacks. You tried all these possible solutions and still have no air blowing? Now put your furnace's blower fan to the test. Below we go over some of the more common causes why this might be happening. It fires up. gas furnace fan keeps. The blower motor and fans spin, pulling air from the Air Return and generating a stream. The air filters for a furnace are the tools used to clean the air, leaving a furnace before it enters your home. Excess dirt and lint wedges itself inside the blower assembly, essentially weighing it down. There should be an inspection window on your furnace, but that does little if you don't know what to look for. At least you know it still works, or else the furnace room would be quiet. The Intellitec climate controls can have a problem in the control electronics, where a signal calling for heat is generated and will start the furnace(s). When the blower motor overheats, it will probably turn itself off as a safety mechanism and that would result in your furnace turning itself off repeatedly and you having to reset it each time to get it going again. Running a furnace fan constantly also has drawbacks. It blows semi-warm air for a little while then it blows cool air. Some HVAC technicians also state that it is better for the fan motor to run continuously instead of turning on and off with the furnace. The Thermostat Is Faulty. I had an issue with mine, read the code and it turns out it was hitting the high heat limit. " This is a small component on your furnace that basically tells it when to operate and when to turn itself off. A- it turns on the blower when the furnace reaches a certain preset internal temperature. Open the access panel. 12 VDC only model -The system switch is a single pole single throw toggle switch and has two positions (ON and OFF). How old is the furnace? Set it to turn. The sail-switch is a safety device that turns off the propane if the furnace loses 12V power (no 12V power = no fan = no way for the furnace to cool itself off, so the gas still burning in a furnace that has lost power could be a dangerous situation, hence the sail-switch). If this happens the furnace blower contacts remain closed so the furnace blower dissipates the excess heat in the furnace exchanger. The Blower motor on my AC unit turns off at random times while the outside unit continues to run which is causing the coil to freeze up. Although uncommon, it is possible for your furnace to run while the blower motor is off (blower motor is the fan that circulates air around your house). First, make sure that power is getting to the motor. Why does my Furnace keeps turning off Furnace is not. Discovered when pulling Y1 (AC) wire furnace behaves normal. Help! I had noticed that the exhaust fan would turn on, followed by the burners kicking in and then I had noticed that a few minutes had gone by the the blower wasn't running. The furnace blower comes on automatically and only when the thermostat calls for heat (regardless of thermostat fan settings). A- it turns on the blower when the furnace reaches a certain preset internal temperature. When this happens the temperature in the house will already be 72F (or possibly 73F) 6. It is a "blow" furnace I'm guessing, one vertically-designed box inside the house with a blower motor, one that typically "warms up" before turning on or "cooling down" before shutting off (when it's working properly that is). The blower is supposed to turn on prior to the burners igniting. Dust and dirt restrict airflow—and if the filter gets too clogged, the heat exchanger will overheat and shut off too quickly, and your house won't warm up. Turn the breaker to the "On" position. The furnace is about 10 years old and is gas. Why Does My Furnace Keep Turning Off And On? Furnace problems are quite common in cold winters. There are many common issues that arise from furnaces and a furnace cycling off and on is one of them. At least you know it still works, or else the furnace room would be quiet. Furnace Services in St. This has never happened during the summer, this only happens during the winter. When the blower motor overheats, it will probably turn itself off as a safety mechanism and that would result in your furnace turning itself off repeatedly and you having to reset it each time to get it going again. Generally, if the furnace blower motors works continually, the limit switch or the roll-out switch is open or in. I go down and turn the power switch on the furnace off and on a couple of times and then you can hear the igniter and the furnace fires right up and will continue to run just fine. If your thermostat only controls the furnace and has a switch to turn the furnace on/off, switch to ON position. I change the filter regularly and have just had the furnace cleaned. However, in some instances, homeowners find that the furnace fan continuously runs and won't turn off. I just moved into this house and have not even turned on the heater once! I could not turn it off by fiddeling with the thermostat, so I crawled under the house and found an off-switch. 1 - Low Airflow. A preventative maintenance approach keeps your unit operating efficiently and helps prevent an unexpected breakdown on a cold winter day. Central AC fan very briefly turns off and back on again Hey guys, I've noticed a new problem with my AC unit and wanted to see if I could get some ideas for troubleshooting. The furnace blower has a two speed blower, but it changes speed by changing the connections to it. Turn the breaker to the "On" position. However that becomes short lived. Set the temperature you would like – for test purposes, just set about 10 degrees hotter than the current temperature to see if the furnace turns on. Forum discussion: Rheem Criterion model. most likely it is your blower motor switch in your heater panel in your dash. A probe inside the switch monitors the temperature of the burner assembly to turn the fan on once the burners are hot and turns the fan off once the burners cool down (when the thermostat stops calling for heat). The thermostat is a Lux 500 programmable, and seems to work fine - turning on and off at the appropriate room temperature. The pilot light was still lit but the blower never turned back on, then I read the manual and saw that the blower needs to be running first before you light it. 1 - Low Airflow. In some instances, a tripped circuit breaker isn't your furnace's fault at all. However, it is prone to different kinds of problems. Issues with the run capacitor or motor: These problems cause the blower not to turn on after the burners ignite. If your furnace's motor runs but the blower doesn't move air, the belt that connects the two probably has broken. Air conditioner is turned off but fan keeps running. What happens when the furnace kicks on, blows warm air, and then shuts down before the room is heated?. If it's failing, it can cause the system to short. Simply put, it senses the temperature of the furnace and tells the blower fan to turn on and off at the appropriate times. However, when the belt stops working, it may be the reason your furnace starts making loud noises. 5 to 3 minutes after your thermostat calls for heat and should turn off several minutes after the heating cycle ends. Excess dirt and lint wedges itself inside the blower assembly, essentially weighing it down. If it's off, no gas will enter the furnace, so nothing will burn. The furnace cycles and the fan turns on but the heat never heats up or only heats up momentarily. Unfortunately, you might be encountering one of them right now. If your blower is turning on randomly or seemingly for no reason and you have a nest thermostat, you need to wire up an extra common wire for it to operate properly. However, when it's warm enough, the blower runs for a little while longer than eventually stops: that's the part where I have the problem. Update: All the answers sound wonderful except this is a GAS furnace, not a hot water furnace. This is a $7 part. com Home Tutorial describing the function and operation of a furnace pressure switch used on conventional and condensing furnaces. The following procedures must be followed: 1. The heater fan turns on for about 30 seconds and then shuts off. The furnace may continue to run the fan blower to help cool itself off, or may not carry out any function until the system is reset or has cooled down sufficiently. He also advises to make sure the set point is at a temperature that will actually turn on the furnace. For instance, if the blower motor has worn out, you will most likely hear it tapping or whizzing at higher frequencies and at louder volumes. So to try to turn the furnace off I switch the thermostat from heat to off and nothing happensthe main fan on the furnace just keeps blowing air and does not stop or power down. First of all, depending on the type of motor the furnace has, having the fan on continuously may add several hundred dollars to the home's electric bill. It's a frustrating experience to turn on your furnace, only to discover no heat comes through the vents. Oil the Furnace Blower Once a Year. Sorry about that, correct model number for gas furnace is GMP 075-4 (Fortunately) the problem occurs somewhat consistently. A flashing green light indicates a working blower system, but if it is red or not blinking, there are issues. However, you won’t be able to take care of this one by yourself. We have gotten 5 separate estimates, all providing vastly different opinions as. The outside unit was still on. Since the thermostat still senses the room is too cold, it sends another message to the blower and the cycle starts all over again. When the igniter fails, the flame sensor will shut the furnace down and cut the gas supply off. Sometimes issues with your furnace’s ignition or pilot controls, a malfunctioning thermostat, or a dirty/clogged air filter can prevent your furnace from turning on when it should or cause cycling issues (i. Why Does My Furnace Keep Turning Off And On? Furnace problems are quite common in cold winters. Many thermostats have a “FAN” setting - with a three position switch…”ON”, “OFF” and “AUTO”. Dirty filters are the most common cause of furnace problems. The thermostat is what tells these separate systems to work together. Furnace fan/blower does not turn on automatically The furnace fan/blower can be turn on manually (switching to ON position from the thermostat--Maple Chase 9600). HomeAdvisor's New Furnace Cost Guide gives average furnace prices, including natural gas furnaces, propane furnaces, oil and electric. It automatically shuts off the fire in the furnace if the temperature becomes too high until the furnace has the chance to reach a safe temperature. Do you mean the furnace blower (fan) won’t turn off? Or do you mean the furnace burners won’t turn off? We’ll tackle these separately. 4 Steps To Troubleshoot Furnace Blower Motor Fan And Repair Replacement Guide When it comes to the cooler months of the year, heating becomes essential and if, after not being used for some time, you go to turn on your furnace heater, only to find that no heat or air comes through the vents, then, as explained in the HVAC Blower Motor Guide. You may not have a thin 1" filter. We disconnected the thermostat and it still does it. you will need to ascertain if the problem is with the blower motor itself. At least you know it still works, or else the furnace room would be quiet. The draft inducer motor was obviously bad and I changed it out. If you have an oil-fired furnace, you may be out of fuel. The furnace is about 10 years old and is gas. A furnace requires proper gas flow to the burner assembly as well as electricity to the thermostat to actuate the heater. When your furnace is cycling on and off, it's called furnace short cycling. But when your furnace fails to engage for some reason, it turns off. Unless there's something very weird about your thermostat wiring, a short in the wiring between furnace and thermostat shouldn't do anything except turn the furnace on. I change the filter regularly and have just had the furnace cleaned. My furnace blower motor was replaced about two years ago and recently I had to replace my board resently thinking it would fix my problem of the blower turns backwards blowing air through my return vents has anyone had this problem can anyone help. 5 Reasons Your Furnace Keeps Turning On and Off Without your home's furnace, you'd likely be shivering from the cold in your own house, or tending to a fire to keep you warm. This can happen 2 or 4 times before the system fires and you hear the burners running at full force. The Blower motor on my AC unit turns off at random times while the outside unit continues to run which is causing the coil to freeze up. If the air coming out is cold when it should be warm, you should call an HVAC contractor. Gas Furnace Blower Not Shutting Off signal that the chamber is too hot and the blower fan stays on to cool things off and of course the heater does not turn on. Like with the blower panel, someone may have shut the gas valve to do a repair and forgot to turn it back on on. If … Continue reading HVAC: Indoor Blower Fan not turning on Automatically?. Here’s a burning question we hear from Lawton, Oklahoma homeowners: “Why won’t my furnace shut off?” To answer this, we need to know what you mean by that since it can be interpreted in different ways. Central AC fan very briefly turns off and back on again Hey guys, I've noticed a new problem with my AC unit and wanted to see if I could get some ideas for troubleshooting. Turn main gas supply to the furnace OFF. • Set thermostat to warm temperature and furnace blower should come on after 15-30 seconds. I put a screw driver in the fan (outside) and pulled it through like a prop start on an airplane, the motor turned on and the furnace ran again for 24 hours. Why won't my furnace blower turn on? I have a Coleman Presidential 2 gas furnace in a mobile home. 90 gas furnace. Probably the first thing that can happen that prevents the furnace from starting is the failure of the draft motor. Note – If this repair does not restore normal operation call for free diagnosis assistance or bring the flame sensor in to the U-FIX-IT Appliance Parts store for free testing and inspection. Any type of heater, whether it is a gas furnace or an oil furnace, is measured using a rating called Annual Fuel Utilization Efficiency (AFUE). Why does my Furnace keeps turning off Furnace is not. Too much heat inside the furnace will stop the burner from firing while allowing the blower to run. The blower won't come on for 30-45 minutes after the AC has been turned off, but after that it seems to turn back on fine. I tested the bottom sequencer but afaik it is good. 3- Remove filter by pressing side filter clips and pulling filter up and out. Set the temperature you would like – for test purposes, just set about 10 degrees hotter than the current temperature to see if the furnace turns on. turn off power to furnace and remove the bottom door to the blower compartment,the filter should be on the right side of the blower housing or it may be directly below the blower housing on the. If you have an oil-fired furnace, you may be out of fuel. This can happen 2 or 4 times before the system fires and you hear the burners running at full force. Move the switch of the fan from an auto position to an 'on' position. My home A/C blower motor runs for a few hours, then will not start again after reaching set temperature. Which is getting very annoying in this cold weather. If your thermostat controls the furnace and the air conditioner make sure the switch is set to FURNACE. A burned-out blower could be the cause of the short cycling. Troubleshooting Furnaces, Heat Pumps and Air Conditioners. The dirty air filter will block airflow, causing the furnace to run longer to heat your home until it overheats. The blower keeps running, I waited 1 hour and it won't stop. Make your decision by considering the risks and benefits, as well as your boiler and furnace's unique features and factors. INDUCED-COMBUSTION GAS FURNACE This keeps the temperature level in your home more evenly SHUTTING DOWN YOUR FURNACE Should you ever suspect a malfunction in your furnace, you will need to turn the furnace off. Pilot stays on but the furnace doesn't come on, step 1. Louis, and we guarantee your. I had an issue with mine, read the code and it turns out it was hitting the high heat limit. Blower Motor - A failing blower motor draws too much power and may cause a short. Why won't my furnace blower turn on? I have a Coleman Presidential 2 gas furnace in a mobile home. I have replaced the circuit board and that didnt fix it. Gas furnace inducer or combustion blower problems When troubleshooting, understand you are working with potentially lethal voltages and a highly flammable gas. What is currently happening is the gas turns off as soon as the furnace reaches the set temp but the main fan does not stop. Even with the thermostat removed, it randomly turns on. Check that the furnace has power. The thermostat is a Lux 500 programmable, and seems to work fine - turning on and off at the appropriate room temperature. Boiler & Furnace Repairs in Tampa Choose the Trusted Experts at Fairway Heating & Cooling. off" turns off the blower. The issue described covers a problem where the furnace will come on even when the control switch is set to OFF and the Thermostats set at the lowest setting. It is a "blow" furnace I'm guessing, one vertically-designed box inside the house with a blower motor, one that typically "warms up" before turning on or "cooling down" before shutting off (when it's working properly that is). If it is good you are looking at the blower motor being the issue, main relay, or the switching relay for those with dual mode models (ac/dc). There are many common issues that arise from furnaces and a furnace cycling off and on is one of them. If the blower motor blows air out the vents when manually set to ON then you know that the blower motor itself is good and something else such as the limit switch is causing the problem. Re: 3 AMP fuse keeps blowing out on Carrier furnace If you disconnected the wire at the c terminal and then call for heat and fuse doesnt blow it sounds kind of like a t-stat issue. Your furnace turns on, runs for a few minutes and then shuts off. 2 days ago · Alright, in addition to saving energy by turning down the heat at night, someone with a forced air furnace, also prolongs the life of that furnace by having fewer starts/stops of the blower motor. Yours sounds fairly new being 2 stage. It fires up. If the blower continues to run the problem would most likely be the relay/pc board that turns the fan on. Blower Motor - A failing blower motor draws too much power and may cause a short. First the updraft blower turns on for a bit, then the HSI glows bright orange, then the gas turns on and the flames. Furnace squeaks when it turns off then off as you listen to first the blower itself, then some of the blower on my furnace started to really totally squeal. If the draft inducer motor is defective, it won't provide the proper circumstances for the pressure switch to close and ignite the furnace. Other issues that can contribute to an overworking furnace blower include home air leaks, duct leaks and closed or blocked-off air registers. Troubleshooting Furnaces, Heat Pumps and Air Conditioners. I cleaned the thermocouple and it solved the problem for about a day. you will need to ascertain if the problem is with the blower motor itself. The exhaust motor turns off and on also. Check power switch for furnace itself - commonly located on wall within about 3-4 feet or furnace, usually a regular "light switch" in the wires leading to the furnace - commonly, though not always, where household wiring converts to spiral metal flex conduit leading to the furnace. Most furnaces use an igniter and flame sensor to ignite the gas and supply heat to the home. Issues with the run capacitor or motor: These problems cause the blower not to turn on after the burners ignite. Furnace keeps turning on and off even when system is off!!! Help!?. If the pilot goes out, it's the thermocouple. Y1/W2 turns on compressor at low speed and may also adjust blower speed for low-speed HP operation. If the blower comes on then that confirms several things: 120 VAC to furnace Blower door switch is OK 24 VAC is OK The R and G wire at least are intact Older HW Smart Valves had problems with the main molex connector plug. I put a screw driver in the fan (outside) and pulled it through like a prop start on an airplane, the motor turned on and the furnace ran again for 24 hours. Turns out my blower motor wasn't turning on. The blower fan helps to circulate hot air throughout the home. Is it the actual blower or is the furnace itself. Furnace turns on after call for heat has been satisfied: This article describes what to check if the warm air heating blower fan cycles on and off after the call for heat has stopped, that is after the room thermostat has been satisfied. I have replaced the circuit board and that didnt fix it. Blower motors are responsible for pushing air into the house once air has been heated. Outside AC Unit Won't Turn On? What to Do Before Calling for Repairs can shut off power to your furnace and indoor blower. Everything is working fine except fan won't turn on by itself when furnace turns on. Some HVAC technicians also state that it is better for the fan motor to run continuously instead of turning on and off with the furnace. Step 3 - Check the Furnace Blower Motor if Your Furnace Keeps Turning On and Off. Turn the heater off, replace the dirty filter with a new one, and turn the furnace back on to see if it cycles normally. However that becomes short lived. It seems like whenever my AC gets close to shutting off from the thermostat hitting the correct temperature, the AC fan will begin to very briefly cycle off and then. It could be a time-delay relay instead of a thermostat that keeps it on for a fixed time after the burner turns off; the time-delay could be mechanical or controlled by the circuit board controller. Some HVAC technicians also state that it is better for the fan motor to run continuously instead of turning on and off with the furnace. Not only is short cycling hard on your equipment, but it also greatly reduces the efficiency of your furnace. The Thermostat calls for heat, sending DC current to the furnace. If the furnace rattles when it turns off, this could be the sound coming from the metal parts of the furnace cooling down. 3- Remove filter by pressing side filter clips and pulling filter up and out. You may not have a thin 1" filter. If motor and blower have oil ports, lubricate. This is a safety feature all furnaces are equipped with in case the temperature gets too hot inside the exchanger. Initially, the burner will turn off and then the blower would turn off as well. GHR26 SERIES 1- Turn off electric power to furnace. Find furnace installation and replacement costs by heating system size (BTS, tons & per home sqft) and more. The owner asked me to look at the furnace after several repair visits provided no improvement to the unit’s operation. I've been noticing that since I've had my heat on these past few cold days, my furnace kicks off before it has even reached the set temp on the thermostat, and a min or two later, turns back on, and keeps doing it. Electrical ignition sparks a high-pressure mist of oil and air, heating the air in an adjacent chamber. Blower won't stop. If I turn the furnace off and then back on again then then the blower comes back on again for 5-10 minutes. Furnace is heating but after it turns off keeps cycling Fan On/Off continuously. Does your furnace turn on at all?. Specific problems can arise with a furnace draft inducer. 4- Clean filter with cold water and a mild soap. Cleaning blower is critical if furnace has a squirrel-cage fan, because openings in this type of blower often become clogged with dirt. should be clearly labeled with a gas furnace sticker. Generally, if the furnace blower motors works continually, the limit switch or the roll-out switch is open or in. I had a new blower installed on my furnace. This is the reason most furnaces will fail to operate. Verify the. If the blower motor is burned out, replace it. 2- Remove blower access panel. About The furnace pressure switch is designed to sense the negative pressure created by the draft inducer motor at furnace start up and to shut down furnace ignition if. I got a Trane heat pump a few years ago, however it is an add on to an oil hot air furnace. Limit switch set wrong. * Locate and turn on the furnace switch. Dec 20, #3 Check the furnace's blower. If, on the other hand, the burner cycles on and off while the thermostat is NOT satisfied and the blower continues to run; then a larger more serious problem may exist. Does your furnace turn on at all?. I have an older GAS furnace that all of the sudden is not working correctly. Soon after, it turns back on and the process repeats. If your blower is turning on randomly or seemingly for no reason and you have a nest thermostat, you need to wire up an extra common wire for it to operate properly. My TRANE XE 90 blower fan has a mind of its own. Smells Like Furnace Is Burning. A probe inside the switch monitors the temperature of the burner assembly to turn the fan on once the burners are hot and turns the fan off once the burners cool down (when the thermostat stops calling for heat). Lennox Gas Furnace that turns on and shuts off in minutes The unit will turn on and run fine for a few minutes then shut off. The 4-speed blower optimizes air circulation and conserves electricity at the same time. Limit switch set wrong. The blower motor and fans spin, pulling air from the Air Return and generating a stream. GHR26 SERIES 1- Turn off electric power to furnace. I can jump across them and the gas valve works but ignitor. The heating elements are working because I can feel the heat from the furnace but the motor does not. I've been noticing that since I've had my heat on these past few cold days, my furnace kicks off before it has even reached the set temp on the thermostat, and a min or two later, turns back on, and keeps doing it. Electronic Ignition Gas Furnace Problems & Troubleshooting. My furnace kicks in and tuns off by itself? I turn off my white rodgers thermostat ( no heat no air conditioner), the switch fan is in auto, but once a while the furnace turn ON by itself, ( just the motor no blower) for couple second or may be a minut max then it turn off. These same diagnostics also aid in air conditioning blower assembly diagnosis when an A/C blower continues running. Furnace Services in St. Open the access panel. If your blower is turning on randomly or seemingly for no reason and you have a nest thermostat, you need to wire up an extra common wire for it to operate properly. Now it only shuts off once instead of 3 or 4 times. One of the most common issues with a furnace blower fan is the inability to start. Normal operation had been when heat pump can’t keep up, the heat pump and furnace blower turn off. Will not cycle off unless I remove power to the entire HVAC unit. The main furnace blower sits behind the blower shroud on which the furnace data plate is attached. Louis with Jerry Kelly. replace switch from auto part store; if the switch keeps burning out it is due. If you're experiencing this problem, your furnace may turn on, heat up for a few minutes, and then turn off before the target temperature in your home is reached. If it is just rattling, tighten all the screws in the cabinet around the furnace in case that's what rattles when the blower turns on. I tested the bottom sequencer but afaik it is good. gas furnace fan keeps. A thermostat is nothing but a switch. Heating Operation—Single-Stage Furnace W/W1 causes furnace to operate. Blower Motor - A failing blower motor draws too much power and may cause a short. I can turn the A/C switch off at the thermostat and wait a while (about an hour, then turn it on again and the blower will work again. There are many common issues that arise from furnaces and a furnace cycling off and on is one of them. Also, turn on the fan connected at the thermostat to check the condition of the furnace blower motor. When you raise the thermostat to a warmer temperature, the furnace blower will turn on after about 30 seconds. The flame does not start again until the blower motor turns off. The thermostat is a Lux 500 programmable, and seems to work fine - turning on and off at the appropriate room temperature. After a few minutes, the furnace shuts down (to pilot light only). Next, turn on the furnace and try setting the thermostat’s activation temperature below the current air temperature. Usually, when you set your thermostat to "Auto," or Causes for Furnace Not Working With Thermostat Fan Setting on Auto | Hunker. The blower keeps running, I waited 1 hour and it won't stop. In British English, a furnace is an industrial furnace used for many things, such as the extraction of metal from ore or in oil refineries and other chemical plants, for example as the heat source for fractional distillation columns. The way the furnace acts, is when you turn on the furnace from the thermostat, you hear the electronic inducer engages and then it shuts off before the flame sensor picks up. Louis, and we guarantee your. Check your ignition to make sure it’s on. 4 Steps To Troubleshoot Furnace Blower Motor Fan And Repair Replacement Guide When it comes to the cooler months of the year, heating becomes essential and if, after not being used for some time, you go to turn on your furnace heater, only to find that no heat or air comes through the vents, then, as explained in the HVAC Blower Motor Guide. Re: hydro flame rv furnace troubleshooting web site: Greg Jones: 1-23-11 : I have a hydro flame by Atwood furnace in my trailer and when I turn on the heater, the fan runs but I am not getting power to my ignitor or my gas valve. When your furnace isn’t actually heating, though, your furnace blower shouldn’t be running at all. If no click, check all wires (both at the thermostat end and inside the furnace). Find furnace installation and replacement costs by heating system size (BTS, tons & per home sqft) and more. Call a professional. It is a "blow" furnace I'm guessing, one vertically-designed box inside the house with a blower motor, one that typically "warms up" before turning on or "cooling down" before shutting off (when it's working properly that is). Now the blower runs constantly, and though the draft inducer has 120 vac going to it, it will not turn on. The blower keeps running, I waited 1 hour and it won't stop. If your furnace overheats, this sensor will trip, causing the heat to turn off. To help keep your furnace from constantly turning on and off, make sure that you change the air filter at the start of each new season and check it monthly. Right now, it is quite the opposite. Air conditioner is turned off but fan keeps running.