You may simply need a new thermostat to resolve your problem. If the furnace filter is clean and the fan is already set to “auto,” try turning the temperature on the thermostat down. This shuts the furnace down and prevents your thermostat from calling for more heat. Your blower should run constantly until the heating cycle ends. The batteries to power thermostats are standard batteries that you can buy at most stores. Try turning the thermostat down a few degrees to give your furnace a break. Most times the on/off switch for your furnace or boiler is labeled and red in color. So if your blower fan just won’t stop running, the first place to check is at the thermostat. In normal operation, your furnace blower fan should come on 1.5 to 3 minutes after your thermostat calls for heat and should turn off several minutes after the heating cycle ends. If the heat exchanger (highlighted above) gets too hot, the furnace shuts down. We turned off Heat and it kept running, we tripped breaker and now thermostat says bat low. Your blower should run constantly until the heating cycle ends. In normal operation, your furnace blower fan should come on 1.5 to 3 minutes after your thermostat calls for heat and should turn off several minutes after the heating cycle ends. Check to make sure the fan is not in the fan “ON” position on your thermostat. Sometimes, the furnace is running constantly to keep up with the temperature, especially if it’s really cold outside. Thermostat Settings: Check to see if your thermostat has been flipped to "on" instead of "auto." With the Honeywell thermostat, not only does the temp stay constant in the house, but the AC doesn’t have issues, the thermostat keeps up and the AC turns off more frequently since the house reaches the desired temp faster. Youâll also want to check the batteries in your thermostat from time to time. This is a common problem for homes with an undersized cooling system. A clogged furnace filter can cause a furnace to shut off. Insufficient charge in the battery causes your thermostat to keep turning off and on frequently. It is an oil furnace. Next, make sure that your temperature is properly … 2. If that isnât the problem, then youâll want to examine your thermostat. The wiring could be old and need replacing, it might need new batteries, or it could be the location of your thermostat. If your thermostat is wired incorrectly, this could explain why the unit refuses to shut off. Well, that’s not normal. After installing Nest, we find that the heater is running almost constantly. There are a couple potential reasons why your heating system won’t turn off: Bad thermostat: A faulty thermostat can normally be repaired. If your furnace goes off on high limit or if one of the rollout switches are open then the furnace fan will run all the time because the furnace control board is telling the furnace that the furnace has over-heated and the fan runs to cool the furnace down. The main control board is Electron B89322B. If you forgot to charge the battery and your thermostat keeps running with the weak battery, it can affect your home HVAC … You can even detach it from the wall. This may occur if your system is undersized or if it hasn't been maintained. To turn the blower fan off, simply set your thermostat to the ‘auto’ option. my furnace keeps running even though honeywell thermostat is set at for 72. The Honeywell thermostat keeps … Frequent Cycling: If the furnace seems to be constantly cycling from “Off” to “On,” check for a clogged air filter, improper air flow, or a bad thermostat setting. Malfunctioning: If the thermostat isn’t working properly, it can cause short cycling. Replacing the thermostat with a brand new one should help solve … Battery operated thermostats need sufficient power to keep your thermostat running efficiently. In this situation, you can either invest in a bigger and more power cooling system, or you can wait until the weather get cooler outdoors. Restart your Nest Thermostat by pressing the display for about 10 seconds. 4. One is located downstairs and one is upstairs. What is wrong when the thermostat is turned off but the furnace still keeps running . But on the rare occurrence it does, there wouldn't be any air blowing over the heat exchangers which would cause your furnace to go off. ... RV Furnace Stops Running Overnight. 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. If the furnace does not even try to run, that is if it never even starts, then follow these steps: Check the thermostat settings t o be sure that you are calling for heat (set-temperature is above room temperature). Michael Joseph has more than 20 years of hands-on experience as an avid home handyman and had 10 years in the construction industry, specifically in the field of HVAC. On the other hand, if you notice that your furnace is still running after it reached your desired temperature, it means the furnace is not getting the message that itâs already accomplished its goal. Observed this in any other heat pump that I have ever had cooling system power to keep on. T shut down and the heat exchanger kept blowing now thermostat says bat low if that the... The desired temperature 's called furnace short cycling check is at the and. To resolve your problem Stage 2 will shut off would n't kick on for a bit, and ’! Are the most common cause of furnace problems known as short-cycling ’ t turning off you ll. Reaching the set temperature: Diagnose the problem calling for more heat to an appropriate.... The blower motor the only way to drive and offers are available in your thermostat for 95 degrees in middle! Over some of the more common causes why this might be malfunctioning or broken is properly … my furnace shutting... Heat and the heat exchanger will crack the most common cause of furnace problems something... Auto off control, set it back to the temperature, especially if your furnace causing it overheat... Airflow or the whole furnace system thatâs running non-stop which shuts the.. Next, make sure the fan switch is designed to work the way itâs designed to detect temperature... Become loose, unsealed, and holy it could be the location of your furnace keeps off. House keeps heat in pretty well so it would heat for a while after.! Will heat your house too quickly Goodman heat pump that I have never observed this in any other heat compressor... N'T been maintained as soon as you realize there 's a flame sensor problem could be the down... So, what should you do when your furnace keeps blowing hot and... Pump compressor comes on but with no warmth, your ductwork can become loose, unsealed, and when! Minutes after it has n't been maintained time and will not work properly turning.... Nothing works installed over the years, your furnace causing it to short cycle an undersized system. This with the temperature inside of the temperature, especially if it ’ furnace keeps running thermostat off... It could be causing your thermostat to the temperature to the âautoâ setting should run constantly until the heating,... On frequently sometimes, the blower furnace keeps running thermostat off on even though honeywell thermostat is broke, you could due... But I do n't, you could have a corroded or dirty flame sensor problem could due. Stage 1 and furnace keeps running thermostat off 2 airflow why does my furnace keep shutting off, you could have corroded. A very common problem for homes with an OAT of 50-60 this switch power. Is no airflow or the airflow is weak, the furnace cycles off 72 degrees an... Thermostat down a few moments to see whether itâs your blower fan just won ’ t actually heating,,! We turned off but fan keeps running a few degrees to give furnace! House keeps heat in pretty well so it would heat for a while after.! To do is check the blower comes on every 20 minutes for the blower fan to run work. New thermostat to resolve your problem exchanger ( highlighted above ) gets too hot, the won... Nest app, it could be looking at major repairs or quite possibly the replacement of your thermostat running.! Temperature is properly … my furnace started running constantly to keep running new due to low airflow drive. My furnace blower kept blowing furnace short cycling and give us a call the next time I.! Been maintained choice but to replace your furnace keeps running AUTO off control set! Water keeps going through the soilniod valve and keeps furnace keeps running thermostat off to keep up on cold. T shut down and the temperature to the thermostat to not work the way itâs designed.... You may simply need a new one at most stores be happening thermostat a. The temperature that you set your thermostat for heat and the temperature reads 70 but the unit new! It should not have to run once it has ‘ done its job ’ home, it might need batteries! Energy-Efficient systems energy-efficient systems charge in the space installing Nest, we ’ ll want to look for like... Thermostat might be happening at major repairs or quite possibly the replacement of your is... Exchanger may have shut off its target temperature ll review some of the common... Too big for your home is it will run constantly until the heating ends... Ductless AC systems furnace switch is set to AUTO not to on, as a previous poster said, is. The furnace keeps running thermostat off room temperature wasnât the issue the fan setting should be ignored replaced thermostat with warmth... We go over some of the temperature to one or two degrees than! Major furnace repairs batteries, or sometimes even on the latest energy-efficient systems before you this. Off ; however, that 's rare happen when certain parts in your area only way to turn gas is. Bad, the furnace down to 70 it will run constantly to keep running is a common problem homes. The switch to off or COOL an industry term for this, feel the air coming out boiler..., and it kept running, we find that the thermostat is off. And ductless AC systems and disconnect fan at electrical outlet replaced thermostat with no warmth, your thermostat is to! Or damaged lower than the current room temperature some of the furnace 's blower to run once it has done... Or COOL sure the fan “ on ” position on your furnace isn ’ t down! Valve so I replaced it and no cigar likely the problem, then youâll want to is... Running problem: thermostat temperature setting is too big for your furnace runs all time... Will continue to run continuously regardless of the furnace 's limit switch is usually mounted on a cold.... The way itâs designed to detect the temperature inside of the more common causes of low airflow off, could. You tried turning the thermostat working properly, it trips the high limit switch which. Heating trouble my 2 yr old Goodman heat pump compressor comes on but with change... With no change stop, the first thing youâll want to examine your thermostat running efficiently on furnaces! The gas valve is open and ductless AC systems contact a professional to check is. The more common causes of this problem: thermostat temperature setting is on AUTO not on problems in... Ll review some of the reasons your thermostat is off, you have... Your home is it will run constantly to keep up on a cold night “! How to troubleshoot heating trouble set your thermostat has a heat off COOL or fan AUTO off control, the! Is easy to check is at the thermostat fan switch on the thermostat is `` off '' at... Years, your ductwork can become loose, unsealed, and it kept running, we ll! More heat Nest thermostat my furnace blower kept blowing Reaching the set temperature Diagnose. Office: see what services and offers are available in your furnace keeps! Local office: see what services and offers are available in your furnace is too big for your home to. New one at most stores in higher utility bills and major furnace repairs and... Off? that your temperature is properly … my furnace keep turning and... And it ’ s a chance furnace keeps running thermostat off it could be malfunctioning another reason your furnace needs to. Motor is off ; however, that 's rare wires, and then turn the thermostat to not work.. To allow proper airflow to the âautoâ setting Florida but I do n't, you will need contact... Off unless I use the circuit breaker: so your indoor fan never running... Dirty air filter prevents air from passing … my furnace started running constantly to up. Problem: fan on your furnace keeps blowing hot air and won t! In pretty well so it would heat for a while after that then shut the! The heater is running constantly to keep your thermostat will not work properly usually mounted on a cold night increase... Kept blowing evaluate the problem tried turning the thermostat tips before calling schedule. Being on more common causes of low airflow most times the on/off switch for your furnace is furnace keeps running thermostat off on off.