Heat Pump Blowing Cold Air | Refrigeration Heating Troubleshooting. If you have a Nest learning thermostat that blows cool air when it’s set in heating mode, you have to adjust the settings of the O/B wire orientation of the heat pump. The pump is not leaking or making noise. 7 Possible Reasons Your Home Heater/Furnace Is Blowing Cold Air. I followed the instructions to the tee, took pictures and went back an rechecked my work. RTH9585 blowing cold air when set to heat I installed a new RTH9585 over the summer, our old Robert Shaw stopped working. Auixiliary Heat will turn on automatically when heat can no longer efficiently transfer heat from the outside air to heat pump. We tried to replace this thermostat with a programmable one. Nest Thermostat isn't blowing cold air. The only wires my husband removed before I took photo was the red and green. Any Heat Pump Repair. Just now I set the heat to 74 the heat turned on heated the room to 76 and then left the fan on after the “heating element” turned off so it was just blowing cold air at my face half the night. You can do this by following the steps given below. When his inspector looked at his HVAC system (a heat pump, meaning it both heats and cools the house), a few big problems immediately made themselves known. Thermostat Screen . If your furnace’s blower fan is set to run continuously, it runs even when the system is not working to produce heat. I installed a new thermostat in our new house and like i said, it's blowing air, but the air is not cold. Otherwise your electric heater or gas furnace will not turn on. 3,216 satisfied customers. Ensure that your thermostat is set higher than the temperature in your home. Go to your thermostat and take a look at the fan setting. Active 3 years, 7 months ago. Claim Offer More Offers. I live with my roommate who has a Nest thermostat. So, how do you know which problem is causing your furnace to blow cool air? Mark Henley. Will a badly worn impeller on the water pump be my problem. No problem, or so I thought. Note that auxiliary heating is not the same thing emergency heating (displayed as “EM HEAT” or “EMER” on most thermostats). Conclusion: Heat Not Working Chevy S10. Does the thermostat show any of the following icons or messages? Furnace Blowing Cold Air : 11 Common Reasons Why And How to Fix It 1. What am I missing. This time of year, especially when it gets cold outside in the evenings, we get many calls from homeowners concerned that there is cold air blowing out of the duct registers in their home when their heat is running. I checked and the Best said it was 78 degrees inside when I had it set to 68. NO – My heating isn't working, but I'm still feeling air flow. Schedule Service. Ask Question Asked 3 years, 7 months ago. I have been told to try and replace the water pump. my furnace starts up blows hot air and then after a minute. AUTO ensures that the blower will run only when the furnace heats the air. The heater was on last night, and working fine. We have a forced air system, all wires from old were matched to the new one. If there is anything you would like to add, please feel free to leave a comment below. Almost magically, it can also pull heat from the cold outside and push it indoors to heat! The temperature drops to 68 degrees inside. The Thermostat Fan Is Turned Incorrectly. I reinstalled the old unit due to the house getting too hot with my daughter here. No warm/hot air coming out of vents. The new thermostat blows cold air when the heat is on. Thermostat: A Furnace Blowing Cold Air Could be Due to Your Thermostat. The vents are blowing cold air. Ensure that there is actually a problem when your heat pump is blowing cold air . Nest thermostat turns ON AC instead of heat. I swapped it with a White-Rodgers Sensi thermostat. Air coming out flat, not cold or hot, regardless of whether it is set to heat … If you think that your heat pump is blowing out cold air, first you want to make sure that it actually is in fact blowing out cold air. Furnace not working. The problem is if it’s 30 degrees or lower out it’s just blowing in freezing cold air. The auxiliary heat would kick in at this point to help maintain the temperature in the space. YES – Continue to the next step. Brice Heat Pump Repair: Heat Pump Blowing Cold Air in Winter. off. Temperature on thermostat always shows between 68-70 max. I bought my Nest Thermostat in December and about 3 days ago I noticed that it wasn't as cool as usual in my apartment. While conventional gas or electric furnaces blow hot air, from 130 to 140 degrees for short periods of time, a heat pump will gently blow warm air, from 110 to 115 degrees and stay on longer to circulate it. Unfortunately I have to look into this myself as my roommate is never around or doesn t care to help. 2. Reasons Why Your Furnace Might Be Blowing Cold Air The Thermostat is Set Incorrectly Symptoms. But, using the info above about how and why a heater would fail can make it a lot easier. Proudly serving Columbus, Ohio since 1983. Silly me thought it would be as easy as changing a light switch or ceiling fan. Your System Was Just Turned On. When the thermostat is on, it might set the air to the room temperature. or Request Estimate. We turned the heat off and the vents are still blowing cold air. Your furnace may be blowing cold air because the filter is too dirty. The Sensi Thermostat is not able to control the 2nd thermostat. I went to Home Depot and bought the closest model to the one I had. I have a 1998 Ford Expedition 5.4 V8 engine, It is blowing cold air, no heat. If you just turned on the heat, hot air may not yet be flowing through your air ducts. Troubleshooting why cold air blows when the thermostat is set to heating mode. The thermostat is set to 70 degrees. I used the same wiring as the thermostat before it and now it is only blowing warm air. Well, if your furnace is blowing cold air, it’s most likely due to one of these problems: Your thermostat settings need to be adjusted; You have leaky air ducts; Your fan limit switch settings need to be adjusted; Your furnace is overheating ; Yeah, that’s a lot of possibilities. It can be tough to find why your S10’s heater is blowing cold. Troubleshooting a Heater Blowing Cold Air. Again using Occam’s Razor, we can assume that the next likely culprit for your heater blowing cold air is your thermostat. The furnace no longer blows hot air. Answer: Several possible things could be the cause of your home heat blowing cold air only. Photo was the red and green new thermostat worked flawless with the A.C. and i tested... 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