The old thermostat blows hot air when in heat mode. I followed the instructions to the tee, took pictures and went back an rechecked my work. UPDATE: So the complex maintenance guy was nice enough to come out on his day off to check it out. How to Troubleshoot an Air Conditioner That Blows Warm Air. If light barely passes through the filter when you hold it up to the light, you should replace it with a fresh one. If your system starts to blow cool air when your Nest thermostat is in Heat mode (or if it blows warm air when its in Cool mode), change the settings for orientation of your heat pump. Now that you have checked the thermostat setting, we will continue on to the next issue for you to troubleshoot. I sincerely hope that you, your families, friends and loved ones are staying safe and healthy during this time. Service Champions is the Northern California air conditioning company for homeowners who want industry leading technicians and a 100% money-back guarantee. step-by-step how to clean your outdoor condenser unit, professional air conditioning tune-up and cleaning, 8 Tips for Saving on Water Heating this Summer. It happens more often than you’d think (usually from an accidental bump or finger nudge). Keep doors and windows closed when running the air conditioner. Color is not always indicative of proper terminal. Update amazon now offers a free smart home consultation After two not helpful calls with Honeywell, I have the unit set on Cooling and it is blowing hot air. We serve Concord, Livermore, Pleasanton, Sacramento, San Jose, and surrounding areas. First, a heating source may not be present. Homeowners who need furnace repair, maintenance, or installation of a brand-new heating system love that we stand behind our work on EVERY job. Simply flip the thermostat setting back to “cool” and see if the air conditioner begins to blow cool air again. If you just added coolant after replacing the water pump and thermostat, but did not use the purge points to expel trapped air, that in itself could be the cause. If you change this setting on the thermostat and you still feel lukewarm air blowing through your vents then you may have to address some other issues. Low coolent light comes on at least once a week. “ON” means the fan is always blowing air through your vents, even when your system isn’t working to cool the air it blows. (2003 Mazda Tribute) He changed thermostat again & said it needed a new waterpump to stop overheating & needed to blow the air though the inlet of the heatercore to unclog it. The air conditioner unit humming when it attempts to start. Your Thermostat Setting Is Wrong. Continue to the Thermostat Wiring section. If your thermostat is battery-powered, try replacing the batteries. If you’ve been asking yourself, “Why is my air conditioner blowing warm air?” Service Champions wants to help. If you have a blown fuse, you will need to replace it. On many thermostats, you’ll see a small lever that moves along a calibrated scale (not the heat temperature lever) and may be marked “longer.”. The sooner you respond to under or overcharged refrigerant the better. Before I changed my thermostat my furnace would build up heat, and then the blower would start blowing hot air. If your thermostat has a R and Rc, then there has to be a physical wire (jumper) connecting the R and Rc, along with the red wire going into the R slot. Remember to schedule a professional air conditioning tune-up and cleaning at the start of every cooling season. ? now my motor is good but my heat for the cab is very low unless i rev it up then it gets good and hot..thank you for this post now i am going to bleed off the air i had no clue i needed to do this! The coolant level may drop as the thermostat opens. If it's not blowing hot air check the following: Coolant/air lock ... there may not be sufficient temperature in the coolant to provide sufficient hot air. Try bleeding air out at thermostat bleeder.. let it run for about 30 seconds till it runs constant at bleeder then give it a try. "2003 mercury sable. If so, then check our thermostat wiring colors page to make sure they wired it properly. The reason your furnace is not blowing hot air could be a setting on the thermostat, a circuit breaker, or a clogged air filter. When I sit at red lights the truck blows cool air My car has 179000 miles. Same with my 05 Impala. Unfortunately, it is possible for the circuit breaker to have been tripped or a fuse to … The Fix: Refrigerant (aka coolant) is highly dangerous. Gas furnace not blowing hot [ 2 Answers ] We have a gas furnace with 110 blower and it is not blowing hot air. Thanks for everyone's help, I learned a lot about today. Dangerous to you and the environment, refrigeration adjustment should always be left to a professional. There are many different reasons why your AC is blowing warm air. NO – Contact Support at 1-855-733-5465 to find a pro-installer in your area. While i agree and get that the color doesn't always match, I labeled each wire as i removed them from the old tstat. No improvement. The instructions depend on which thermostat you have. Adjust the heat-anticipator lever one calibration mark closer to the … If you need air conditioning maintenance, repair or a brand-new system, we've got the best-trained and most-skilled technicians in the industry. Causing your air conditioning tune-ups before the cooling season begins a little puff smoke. Lot about today n't noticed any noises temperature is not blowing hot air now that you have the! That W means white and Y means yellow day off to check the condition of your air conditioner blowing air! 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