my furnace starts up blows hot air and then after a minute. The heat pump mode is operating but can not keep up. Go to your thermostat and take a look at the fan setting. Answer: Several possible things could be the cause of your home heat blowing cold air only. This problem could be mainly because of the wrong wiring connection. Nest thermostat turns ON AC instead of heat. Brice Heat Pump Repair: Heat Pump Blowing Cold Air in Winter. 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. 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. Note that auxiliary heating is not the same thing emergency heating (displayed as “EM HEAT” or “EMER” on most thermostats). If your furnace is blowing cold air some of the time, but working otherwise, there are a few possible reasons for the problem. I installed an Emerson Sensi wifi thermostat. If you cannot access the site, check your smart phone or tablet Wi-Fi settings. The old thermostat blows hot air when in heat mode. If a thermostat is set incorrectly, you might notice your furnace blowing cold air from the heat registers, a lower than expected temperature reading on the thermostat, or you may even hear your air conditioner running outside. I went to Home Depot and bought the closest model to the one I had. Any help would be nice. Does the thermostat show any of the following icons or messages? It can be tough to find why your S10’s heater is blowing cold. All these concurrences leading to the problem of car heater blowing cold air. Your Sensi thermostat will continue to heat and cool your home during this time. Outside of a heating cycle, the furnace could be blowing cold air because of a settings mistake. But, using the info above about how and why a heater would fail can make it a lot easier. If your pilot light continues to go out, your thermostat has power but doesn’t seem to work properly, or you can’t locate the reason for why your furnace is blowing cold air, it is time to call the professionals to help you get your warm air back on and working. Why is my home heat blowing cold air only? No problem, or so I thought. 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. 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. If the Wi-Fi connection is still unsuccessful, we recommend contacting your cellular or Internet service provider to reestablish service. There are several types of heaters, but many use central air to heat their home, and when it’s turned on, the home should get warm after the heating system has been running for a while. It still required me to rewire it. Your furnace may be blowing cold air because the filter is too dirty. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it … Called a “dual-fuel system”, the gas furnace kicks on when the heat pump can no longer efficiently pull heat from the cold air outside. The problem is if it’s 30 degrees or lower out it’s just blowing in freezing cold air. RTH9585 blowing cold air when set to heat I installed a new RTH9585 over the summer, our old Robert Shaw stopped working. I have been told to try and replace the water pump. If your furnace’s blower fan is set to run continuously, it runs even when the system is not working to produce heat. If there is anything you would like to add, please feel free to leave a comment below. Troubleshooting why cold air blows when the thermostat is set to heating mode. 1434I just installed a Honeywell RTH9580 wifi thermostat and cannot get it to blow cold. Conclusion: Heat Not Working Chevy S10. Auixiliary Heat will turn on automatically when heat can no longer efficiently transfer heat from the outside air to heat pump. There are other reasons your heat pump could be blowing cold air instead of heat, but those are the basics. Claim Offer More Offers. So, how do you know which problem is causing your furnace to blow cool air? I followed the instructions to the tee, took pictures and went back an rechecked my work. We have a forced air system, all wires from old were matched to the new one. 7 Possible Reasons Your Home Heater/Furnace Is Blowing Cold Air. Continue to the Thermostat Screen section. Active 3 years, 7 months ago. Nest Thermostat isn't blowing cold air. Details. (I'm thinking job well done right now) Once the home reached it's target temperature, I felt cold air blowing. This video will show you where you should start with your furnace troubleshooting. The thermostat is what determines when the auxiliary heat is energized. The heater was on last night, and working fine. Call 614.262.1818 for details. Will a badly worn impeller on the water pump be my problem. What am I missing. We put the r … read more. We turned the heat off and the vents are still blowing cold air. Air coming out flat, not cold or hot, regardless of whether it is set to heat … Again using Occam’s Razor, we can assume that the next likely culprit for your heater blowing cold air is your thermostat. Your System Was Just Turned On. 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. Your cellular data service may be interrupted, off, or out of range. Do this: Ensure your thermostat’s fan setting is set to AUTO, not ON. 4 Recommended Answers 76 Replies 0 Upvotes. My husband said the unit in the basement is cold and he couldn't see a flame. 3000 digital thermostat - heat pump installation. Ensure that there is actually a problem when your heat pump is blowing cold air . Schedule Service. or Request Estimate. 2. Check the Thermostat Fan Setting. I installed a new thermostat in our new house and like i said, it's blowing air, but the air is not cold. HVAC Controls DDC. New thermostat worked flawless with the A.C. and I never tested the heat mode until now that is getting cold. Heat Pump Blowing Cold Air | Refrigeration Heating Troubleshooting. One of the most impressive things about a heat pump is that it can both cool and heat your home. The auxiliary heat would kick in at this point to help maintain the temperature in the space. It is unusually cold outside. The Sensi Thermostat is not able to control the 2nd thermostat. I swapped it with a White-Rodgers Sensi thermostat. Thermostat: A Furnace Blowing Cold Air Could be Due to Your Thermostat. Almost magically, it can also pull heat from the cold outside and push it indoors to heat! Viewed 1k times 1. Furnace Blowing Cold Air : 11 Common Reasons Why And How to Fix It 1. The vents are blowing cold air. When you notice that you have a furnace blowing cold air, the first thing you should check is the thermostat. YES – Continue to the next step. I reinstalled the old unit due to the house getting too hot with my daughter here. One: The thermostat could be faulty. The thermostat is set to 70 degrees. AUTO ensures that the blower will run only when the furnace heats the air. Is your furnace blowing cold air or not turning on? 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. You can do this by following the steps given below. The LCD screen on my old thermostat kicked the bucket. Rebecca, if I were close to where you live, I would come out and take a look at your system and tell you what was wrong and repair it for you. We have replaced thermostat, radiator cap, blew out the heater core, attempted to get any air in the system, out. I live with my roommate who has a Nest thermostat. Go to your thermostat 10. Check the furnace’s air filter. Ask Question Asked 3 years, 7 months ago. Otherwise your electric heater or gas furnace will not turn on. NO – My heating isn't working, but I'm still feeling air flow. When a thermostat gets stuck to the ‘open’ position, the engine takes a much longer time to warm up. When the thermostat is on, it might set the air to the room temperature. I have switched the thermostat to heat now that winter is here, but only cold air will blow from the vents, even though it is set to heat to 72 degrees (Fahrenheit). Mark Henley. The temperature drops to 68 degrees inside. Troubleshooting a Heater Blowing Cold Air. We tried to replace this thermostat with a programmable one. Once I replaced the thermostat, the furnace turned immediately upon adjusting the thermostat to do so. Dual-fuel systems are much more efficient and keep you more comfortable than electric resistance heating. Unfortunately I have to look into this myself as my roommate is never around or doesn t care to help. Ensure that your thermostat is set higher than the temperature in your home. $25. I checked my wiring, which does have a C wire, and that seemed fine. This morning it was freezing in the house. Proudly serving Columbus, Ohio since 1983. When the heater blows slightly warm instead of cold air, a thermostat with stuck open valves is to be blamed for. If you just turned on the heat, hot air may not yet be flowing through your air ducts. I used the same wiring as the thermostat before it and now it is only blowing warm air. Some conditions may apply. A friend of ours bought a new house recently. Installed new Sensi Thermostat, Everything Works Except No Cold Air . The thermostat was set at 72 and the inside air registered 64. This is when the outside is around 35-40 degrees and the indoor temperature is around three degrees cooler than the thermostat setting. 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. I checked and the Best said it was 78 degrees inside when I had it set to 68. The pump is not leaking or making noise. The new thermostat blows cold air when the heat is on. Silly me thought it would be as easy as changing a light switch or ceiling fan. Furnace not working. Air trapped in the heater core. The only wires my husband removed before I took photo was the red and green. 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. 3,216 satisfied customers. Any Heat Pump Repair. Temperature on thermostat always shows between 68-70 max. The furnace no longer blows hot air. off. "Heat" "Heat On" Fire Icon; Sun Icon . No warm/hot air coming out of vents. I have a 1998 Ford Expedition 5.4 V8 engine, It is blowing cold air, no heat. When your heat pump blowing cold air, take advantage of these useful tips, and save yourself a little trouble. 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 Thermostat Fan Is Turned Incorrectly. I recently replaced the Emerson 1F97-12377 Programmable Thermostat with an Emerson Sensi Thermostat. Thermostat Screen . The new thermostat works on Zone 1, but the Zone 2 2nd floor thermostat is no longer able to open the dampers to bring heat to the 2nd Floor. Air is flowing strong, furnace fan is working. If your fan motor is not coming on when the thermostat is on the call for heat with the fan setting on auto, this could be caused by several issues. Reasons Why Your Furnace Might Be Blowing Cold Air The Thermostat is Set Incorrectly Symptoms. Rechecked my work gets stuck to the tee, took pictures and went back rechecked... Heater was on last night, and working fine with the A.C. and i never tested the heat pump Reasons... 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