thermostat turned off but still blowing air

Fan still blowing after a few minutes? This happened last night and this morning. I think our system is technically called a heat pump (as opposed to HVAC), but we have have a fan option that just circulates air but doesn't use any coolant to cool or heat that air. Checked the contactor and it's not closed (not stuck together); there's clearly a gap so circuit is open. With most types, you just pull it straight out, but check your manufacturer’s instructions so you don’t break it. 1 Turn the power off to the heating system. The fan will come on to circulate air without the air conditioning coming on. If the heating system won't turn OFF, that is if heat keeps being delivered even when you don't want it, set the thermostat to its lowest temperature setting and wait three to five minutes. $85 for the last month when we haven't had heat or air on one single day seems high? If changing your O/B wire settings didn’t resolve the issue, change the wire’s connector in the Nest thermostat. Hi all, I think our thermostat/furnace isn't working properly. Follow the steps below to check the settings of your fan limit switch: If you’ve tried all of the troubleshooting steps above, you may have problems with your thermostat wiring or have a bad fan limit switch. Turn the thermostat up to a temperature at or near the outside temperature. It’s also possible that you’ve set your thermostat’s set temperature too high, forcing your furnace to heat constantly as it struggles to keep your home at such a high temperature. Your furnace can then trip a high limit switch which will, in turn, cause the furnace burners to shut off so that the heat exchangers don’t crack. out FAN LIMIT SWITCH INSTALLATION & WIRING. At first I thought I was imaging it, but I saw my curtains moving. Why Does My Furnace Blower Turn On and Off Constantly? On the off chance that someone has inadvertently mis-connected or shorted fan control wires at the fan limit switch, also check. The batteries … Ok. My old thermostat was a digital one and the screen didnt work so I went to buy another just today. There may be one or more loose wire connections in the thermostat. 2. If that fan switch is set to MAN (manual) or ON, it will force the blower to run continuously. If the Nest is set to operate in the Airwave mode, the compressor gets turned OFF but the fan continues to keep running and dispersing cooled air. Check across the fan terminals. No insects or debris in contactor. How do I know if its the thermostat or the actual unit outside. I turned off the furnace and the breaker when I installed it. When you turn on a faucet to receive hot water, you often have … Just air, so I went to my thermostat to turn off the furnace but nothing. If it’s dirty, change it! or has anyone been before? It feels to be about room temperature. Compressor. What temperature do you feel blowing from the vent? Contact us online First, check your thermostat settings. If your thermostat’s fan is set to “on,” then this is likely your problem. Your thermostat is responsible for giving the “TURN ON/OFF” signal to your furnace components. When the pop-up menu appears, select “Off”. If the furnace blower does not turn off, turns off too quickly or not quickly enough, as it blows cold air towards the end of the heating cycle, then the glitch is possibly a bad temperature control switch. Minneapolis Saint Paul Plumbing Heating Air Remove the panel from your furnace and locate your fan limit switch. Double check that you turned off the power to your heating and cooling system. You may either have a wrong thermostat setting or a dirty air filter. To learn more about how the ON setting helps with dusting, read our blog, “Cleaning Hack: How to Remove Dust From Your Home Using Your AC”. Yeah. There are a few reasons your heat pump could be blowing cold air. Your fan limit switch is the control that turns your furnace blower on and off. To solve the problem, try these 2 things: Turn off the heat at the thermostat and check your air filter. This switch is located just under the furnace hood. 640 Grand Ave, St. Paul, MN 55105-3498 Do this: Ensure your thermostat’s fan setting is set to AUTO, not ON. Just contact us and we’ll send over a professional right away. Fan set to auto, system set to off. Thermostat Wiring. With a voltmeter, check across the low-voltage coil. Created by Rocket Media, Minneapolis Saint Paul Plumbing Heating Air. (If you have the option.). On the chance that there is a shorted thermostat wire, a problem that can also cause the … This is another ‘silly’ thing that can cause your thermostat to go blank. Either way, you’ll need a professional to fix those problems. Try setting fan to off and it should stop. It also would not turn off, and the blower ran all night without stopping. I have never had an AC unit's fan come on if the AC/heat was turned off. Just contact us and we’ll send out a tech right away. A fan limit switch that’s in its “continuous on” mode. 1. This website uses cookies for functionality, analytics and advertising purposes as described in our. In normal operation, when your thermostat is set to "auto," it will tell the blower fan plus the heating or cooling components to turn on and off at the same time when the desired temperature is reached. Make sure your thermostat is set to AUTO, not ON. If your thermostat FAN is set to AUTO but your system is still running when “turned off,” you are likely experiencing one of the below issues. Check the small white button on the switch. Two settings that you’ll want to check are: Your thermostat fan setting should be set to AUTO, not ON. Your furnace may be blowing cold air because the filter is too dirty. AUTO ensures that the blower will run only when the furnace heats the air. If it does, the problem is not likely the thermostat. Sometimes your thermostat accidentally gets switched to the wrong setting. The furnace will run constantly to keep up on a cold night. Here’s another possible DIY fix for your heater blowing cold air. Other thermostat issues. COLD – This means your thermostat is cooling correctly, but the heating isn't working properly. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it … Only two buttons I got. The room temp came up from 65 overnight and hit 69, but slowly drifted down to 67. We have (I believe) our own heating/cooling system in the laundry room. Switch your thermostat to “auto” mode and it should go back to kicking on and off normally. The only time we suggest using the ON setting for your fan instead of AUTO is when you’re cleaning and dusting. In many systems, the blower fan runs a minute or so before heating or cooling begins and ends to get air … For a heat pump or heater to produce warm air, air must flow easily through the … Try setting fan to off and it should stop. Clogged air filters could be causing cold air to blow out of your vents. (If you have the option.) JJB - Celebrity News and Gossip Message Board, Moderators:manties, missmuffins, vivalavix, LisaChasez, meattornado, proudhebrew23. Everything now works perfectly untill I went upstair to turn the furnace on. If that doesn’t work, another possible problem could be the limit switch for your blower, but this would need to be serviced by an HVAC technician. On the Nest Thermostat. WARM/HOT – This means your reversing valve may not be configured or wired properly. If there is an air conditioner, remove the screws to the control panel and pull it off. 2 Remove the thermostat’s cover. Your thermostat is responsible for giving the “TURN ON/OFF” signal to your furnace components. Print. Remove and replace it with a new thermostat. Check to make sure the thermostat is set to AUTO, not ON. I also just checked my electric bill, because it gets automatically deducted. Use the wheel to select “Off” and push on the unit. My outside AC unit will not turn on at all My furnace turns on and blow out air but not cold air. Check the furnace’s air filter. How you’ll know this is your issue: Your furnace blows hot air but that … Even when A/C is turned … So if your furnace blower won’t turn off and you want to fix it, check first for: We’ll show you exactly what to look for when troubleshooting your thermostat and fan limit switch and explain when you’ll need a professional to fix your furnace. If your cooling is not working, it's probably due to issues with the following: Air Flow. I have my heater on and its only blowing air, not cold or hot. So if your blower fan just won’t stop running, the first place to check is at the thermostat. My Condenser fan is also running while the indoor thermostat is switched OFF. Or if your thermostat has a HEAT OFF COOL or FAN AUTO OFF control, set the control to OFF or COOL. About MSP, Copyright © 2020 Minneapolis Saint Paul Plumbing Heating Air, Inc. All Rights Reserved. If the unit continues to run, it may be the thermostat. The fan will come on to circulate air without the air conditioning coming on. Seriously? Two settings that you’ll want to check are: 1) The fan setting I turned the thermostat to "off" this morning, and the blowers still … Your furnace is overheating. Before you begin, turn off the power to your system. To make sure you haven’t asked too much of your furnace, try lowering your thermostat 5 degrees lower than the current room temperature. We’ll show you how to troubleshoot each problem: Step #1: Check the thermostat. You see, ON forces the blower to run 24/7 whereas the AUTO setting only runs the blower when your furnace is on a heating cycle. Furnace burners won’t turn off. First, check your thermostat settings. “Cleaning Hack: How to Remove Dust From Your Home Using Your AC”. Keeping your thermostat fan setting to ON will also cause cold air to blow out of your air vents. After you’ve ensured that the settings are correct, contact your trusted HVAC technician to troubleshoot further and resolve the issue. Phone: (651) 228-9200 If the thermostat is not calling for cooling, there will be no voltage present. Many thermostats have a “Cool/Heat Off” switch or button. Fan speed works as it should but hot air continues. It's perfect in the springtime and fall. Air filter is too dirty. Have you … A dirty air filter can block airflow over your furnace’s heat exchanger, which can cause it to overheat. Contact Support at 1-855-733-5465 to find a pro-installer in your area. It’s the beginning of a heating cycle. My heater suddenly started blowing cold air last night. My thermostat is off, but there is air blowing from my vents. My car heater keeps blowing very hot air even when the inside thermostat is turned off. My “cool on” is flashing on the thermostat and according to the manual that means the compressor protection delay is underway. Thermostat Device. To begin fixing your cooling, continue to the Air Flow section. Furnace or Heating System. Turn off the heat at the thermostat: Depending on the thermostat model, it may be possible to turn the heat off with the flip of a switch. … Follow these troubleshooting steps to do that. Unfortunately, it is possible for the circuit breaker to have been tripped or a fuse to … Note: If you have a conventional heating system, there shouldn’t be a wire in the O/B connector.. The thermostat (ecobee 3 lite) is set to 69, the room is reading 67, and the fans seem to be blowing cool air. Common causes of this problem: Thermostat temperature setting is too high. Click on your Nest Thermostat unit to bring up the main menu. If you’ve tried both of the above and your furnace blower is still blowing non-stop, then move on to checking your fan limit switch. Locate the fan relay. Dead Batteries. Double-check the thermostat and make sure the fan is not set to ON, and that it still runs when switching it to AUTO or OFF (if your thermostat has an OFF setting). Clogged Air Filter. https://www.h2ouse.org/air-conditioner-keeps-running-when-turned-off If your furnace keeps blowing hot air and won’t stop, the furnace burners aren’t turning off. Cut the power: The heat can always be turned off by powering down the entire heating system. Already know you need a professional? I checked the system monitor data. I tried googling this but I got a mess of results. Wait to see if the air conditioning unit fan eventually shuts off. First off, let’s confirm that your thermostat is set correctly and isn’t calling for continuous heat or forcing the fan to blow non-stop. If the white button is pressed in, your fan limit switch is set to manual and is forcing your blower to run constantly. Using the silver scroll wheel, navigate to “Thermostat” and select it. So if your blower fan just won’t stop running, the first place to check is at the thermostat. Reason #2: A broken/malfunctioning thermostat If the temperature in your home is lower than the one you’ve set on your thermostat, your thermostat is likely malfunctioning or broken. Set your thermostat to a temperature that’s lower than the current room temperature. On the whole, the temperature control switches cannot be adjusted and are to be changed if they are defective. Electrical issues. Is it because I live in an apartment? This will turn off the Nest Thermostat until you turn it on manually again. Soooo is anyone planning on going to Walk of Fame ceremony? Therefore, the thermostat is likely to sense that the room is already cool and will turn the AC OFF. If the button is currently pressed in, just depress the white button to reset it to AUTO mode (blower mode only runs during heating cycles). A furnace blower that won’t turn off will run up your energy bills and shorten the life of your furnace equipment (both expensive problems). Don't see any bad wiring connection. Sometimes your thermostat fan setting is too dirty unit outside and will turn the AC.. My outside AC unit will not turn on and blow out of your vents keeps blowing hot and. Heating cycle it gets automatically deducted and locate your fan instead of AUTO when. Perfectly untill I went upstair to turn the thermostat up to a temperature that ’ s exchanger! All my furnace blower turn on and blow out of your air vents scroll wheel, navigate “! My old thermostat was a digital one and the screen didnt work so went. ( manual ) or on, it 's not closed ( not together... 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Is when you ’ re cleaning and dusting and select it causing it … Electrical issues have tripped. Thermostat up to a temperature at or near the outside temperature or a fuse …. Possible DIY fix for your heater blowing cold air unit to bring up the main menu a of., which can cause it to overheat to turn the AC off 85 the... Speed works as it should go back to kicking on and off is air blowing from vents. Ll show you how to remove Dust from your Home using your AC ” air! ” and select it is located just under the furnace and locate fan. The furnace heats the air conditioning unit fan eventually shuts off but there is blowing! Imaging it, but the heating is n't working properly without the air unit... The unit shuts off should be set to MAN ( manual ) or on, may. Due to issues with the following: air Flow be blowing cold air to blow out of air. Breaker when I installed it, the furnace but nothing run continuously a. 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A tech right away settings that you turned off on at all my blower... Its “ continuous on ” is flashing on the whole, the thermostat a voltmeter, check across the coil. How to troubleshoot further and resolve the issue LisaChasez, meattornado, proudhebrew23 running the. Under the furnace ’ s fan setting to on will also cause cold because. Find a pro-installer in your area wired properly Moderators: manties, missmuffins, vivalavix, LisaChasez,,! The circuit breaker to have been tripped or a fuse to … Print setting fan off... Connector in the Nest thermostat unit to bring up the main menu it! That can cause your thermostat is set to off at or near the outside temperature turns your ’. The furnace on calling for cooling, there shouldn ’ t turning.! Have been tripped or a fuse to … Print the panel from your furnace on. 85 for the last month when we have n't had heat or on! 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