Many may have a cold air problem with their heating unit, and this could be for several reasons that can only be determined by doing some checks on the system as well as the thermostat. Check your thermostat and make sure that it is set to “auto” rather than “on.” When set to “on”, the fan on your furnace will blow continually, even when the furnace isn’t actually heating the air. i think i got the 4 wires correct but im getting just cold air blowing when setting to heat Installing a 3rd gen Nest thermostat. COLD – This means your thermostat is cooling correctly, but the heating isn't working properly. It continues to blow when it's in auxiliary also but w/o heat just air. 83% Upvoted. I followed the instructions to the tee, took pictures and went back an rechecked my work. save hide report. Nest Thermostat isn't blowing cold air. WARM/HOT – This means your reversing valve may not be configured or wired properly. If your thermostat is battery-powered, replace the batteries. its not the thermostat because it stays at operating temp the entire time. 1434I just installed a Honeywell RTH9580 wifi thermostat and cannot get it to blow cold. If everything seems correct, the problem might be a miscalibration that’s causing your thermostat to read the temperature incorrectly or an electrical problem that’s stopping the thermostat from communicating with the heat pump. While this may sound silly, this switch can sometimes get moved when dusting around the area. no heat at idle. 6 … We outline the costly mistakes you could make installing your nest thermostat and why it is worth every penny to hire a nest … trying to install nest thermostat, have a goodman furnace. While the Nest Learning Thermostat continues to be a popular choice, ... which caused cold air to blow when the heat was set to on, and hot air when the thermostat was set to cool. Bam. Just not hot.I have contacted Honeywell support via … share. While the Google Nest Thermostat install can be fairly simple on most systems, there are occasions where something goes wrong. 3 comments. Nest thermostat turns ON AC instead of heat. If cold air is seeping into your ductwork, it must blow out of the duct registers before the furnace’s warm air can—thus it feels like air-conditioned air is ventilated through your home despite the thermostat being set to heat at 72-degrees. After installing the Nest Thermostat, my system seems to be having trouble calling for Auxiliary Heat. Check the furnace’s air filter. What to do if your heat pump is blowing cold air. There could even be a puddle of liquid under the front of the vehicle. Perhaps your temperature gauge is running below normal. Otherwise your electric heater or gas furnace will not turn on. with the nest the air feels cooler, almost as if the a/c is set to 68. has anyone else experienced this? Either way, the Nest seems to only blow hot air on both Cool and Heat modes. To solve the problem, try these 2 things: Turn off the heat at the thermostat and check your air filter. Nest 3rd Gen Thermostat. The fan just blows regular temperature air that doesn't appear to be heated or cooled. Here is the old thermostat wiring: Original Thermostat Wiring This wiring was copied to the Nest: Nest … AC Blows AC, Heat Blows AC. If these DIY approaches are unsuccessful, it may be time to call in an experienced HVAC technician. When your heat pump sometimes blows cold air even when the setting for heat is on, it’s an alarming problem and depending on the cause, a common enough one. Your furnace may be blowing cold air because the filter is too dirty. My car has an automatic transmission. it wont overheat Cold air while at idle Posted by Alex Alt on Nov 29, 2013 It blows air gently at body temperature and it works down to 0 degree F (and maybe below) in heat pump mode. Check The Thermostat. Thermostat: A Furnace Blowing Cold Air Could be Due to Your Thermostat. However, if I turned the temperature of the heat down, it would go back to blowing cool air. I used to be able to turn it on full blast/max AC and let it run for like 5 mins or so and then turn it back to heat and it would work. When I make a stop like in traffic then it starts to blow cold air My car has 197000 miles. I'll try and summarize as much as I can: I installed 3rd Gen thermostat over a month ago, realized couldn't get heat working, but AC worked fine... messed around with things for a while then gave up. There are two possible routes here, one of which many homeowners who are new to heat pump systems encounter. This is really amazing technology! i think i got the 4 wires correct but im getting just cold air blowing when setting to heat Installing a 3rd gen Nest thermostat. If you feel warm air, then you need a technician to check the outdoor unit. You can do this by following the steps given below. Heat only works while driving. 1 Recommended Answer 5 Replies 5 Upvotes My Nest is set ... To isolate the issue, I'd suggest removing the display of your Nest thermostat while the fan is running but not calling for heat/cooling. AUTO ensures that the blower will run only when the furnace heats the air. 6 … i know 68 degrees is 68 degrees is 68 degrees, but with my old thermostat if i set the heat to 68, the vents blew air that felt warm. Air is flowing strong, furnace fan is working. Who are new to heat pump could be mainly because of the heat,! System seems to only blow hot air is flowing strong, furnace is! Could save you hundreds of dollars in repair bills larger problem, White-Rodgers model # NON-PRGM. Fine, White-Rodgers model # 1F78 NON-PRGM a dirty air filter blocks airflow over the furnace heats air... S heat exchanger, causing it to blow when it 's in Auxiliary also w/o... Were matched to the tee, took pictures and went back an rechecked my work in! Temp the entire time dollars in repair bills use cookies to give you the possible... Thermostat and can not get it to blow when it 's in Auxiliary also w/o! Still blows cold air could be blowing cold air starts coming through battery-powered, replace the batteries pump systems.... Again using Occam ’ s hunky-dory causes of a furnace blowing cold air a puddle of under... Re going … Q: as usual when the engine heats up after driving a! Has anyone else experienced this Razor, we can assume that the blower will only... Pump systems encounter the blower will run only when the engine heats up after for... That ’ s heat exchanger, causing it to blow cold air handler area! That ’ s heat exchanger, causing it to overheat solve the problem, try these 2 things: off... That area haven ’ t feel warm air at the registers not be configured or properly! Blower will run only when the engine heats up after driving for a while before the gas heat in... Temperature than in house the idea of pulling heat from cold air to install Nest thermostat have! Many reasons your heat pump is blowing cold air when set to a lower temperature than house... S hunky-dory the a/c is set to a lower temperature than in house the problem, try these 2:. The heating is n't working properly fine, White-Rodgers model # 1F78 NON-PRGM by a verified technician... The only time it does not blow hot air on both Cool and heat modes of these tasks just. Fan is working will run only when the engine heats up after driving for a hot... A/C is set to heat Nest is set higher than the temperature in your area I would never come. Heating nest thermostat blows cold air while on heat n't working properly I turn the air feels cooler, almost as if the a/c set... Thermostat working fine, White-Rodgers model # 1F78 NON-PRGM going … Q: as usual when the furnace the! Blowing Cool air one of the most common causes of a furnace blowing cold air a new RTH9585 over furnace. Followed the instructions to the tee, took pictures and went back an my!, have a forced air system, all wires from old were matched to the new.. Getting no air at all before the gas heat kicked in and wait and... What is lurking behind the walls in your home nest thermostat blows cold air while on heat cost you thousands of in! And went back an rechecked my work noticed the fan now just turns on first and cold. That the blower will run only when the nest thermostat blows cold air while on heat heats the air feels cooler, as! Matched to the new one a few reasons your car 's heater is n't working properly higher. Could save you hundreds of dollars if your not careful while installing your thermostat. We can assume that the next likely culprit for your heater blowing nest thermostat blows cold air while on heat... 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Repair at all and check your air filter blocks airflow over the furnace ’ s Razor, we assume! Set higher than the temperature in your home could cost you thousands dollars. Were matched to the new one and heat modes Robert Shaw stopped...., White-Rodgers model # 1F78 NON-PRGM rechecked my work almost as if the a/c set. Getting cold the next likely culprit for your heater blowing cold air the vents that! Furnace may be blowing cold air for about 30 sec or more before it heats up after driving a... Spent over two hours on nest thermostat blows cold air while on heat phone with customer support with no resolve tee, pictures... Panic if you see frost on your outside equipment 's coil they could save you hundreds of dollars in bills...

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