I was having a problem where my thermostat / AC was blowing out hot air when I wanted it to be Cooling. Similar to when you turn on the faucet before you get into the shower, you may need to wait for a bit for that air to heat up. 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. Go to System. 1. Check this easy fix first, ensuring the thermostat is set to cool, and the temperature optimally adjusted. When I first installed it, it was only blowing hot air. Sometimes people bump into the thermostat and change the setting from “cool” to “heat”. If so, your blower may … This is why you hear the term “forced-air” associated with heaters. If your furnace keeps blowing cold air, you may notice that your air filter is too dirty. Another important thing to check is your thermostat setting. With the new Nest Thermostat installed, my A/C is only blowing cold air. The instructions depend on which thermostat you have. Three D-I-Y Fixes for A/C Blowing Hot Air . 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. Hi all, I think our thermostat/furnace isn't working properly. One of the reasons as to why your air conditioning system may be blowing warm air is due to the way that your thermostat is set. Is It A Problem With The Fan? If you just turned on the heat, hot air may not yet be flowing through your air ducts. We’re not sure … Yeah it's here but I think, after reading and reading I know where I may have fucked up---I chose "forced air" instead of heat pump during the setup portion of installing the thermostat. First, the thermostat must be set to "heat," especially if it can both cool and heat the home. I checked the system monitor data. If your electric furnace is not blowing hot air, there might be some issues with the thermostat. I reset it again and rewired it to only have one white wire installed into the o/b slot. I followed the instructions to the tea with the exception of turning the power to the unit off. So the old thermostat was working properly correct? Incorrect thermostat settings... a wave of cool air from your heat vent before the warm air arrives ... Reasons Why Your Furnace Might Be Blowing Cold Air The Thermostat is Set Incorrectly Symptoms. They heat up air using a flame or heating coil and then a fan pushes that air through your home. It’s not uncommon that an improperly set thermostat is to blame for your air conditioner blowing hot air. Sometimes homeowners forget to turn the thermostat from “warm” to “cool” in the summer. Make sure that you have your thermostat set to “Cool” instead of … With the new Nest Thermostat installed, my A/C is only blowing cold air. Clogged Air Filter. I then reset it and added the second white wire (s1 wire) into the o/b wire slot to see if that changes anything. So, I bought a new one (Honeywell Lyric T5). Contractor's Assistant: Did you double-check the thermostat's settings? Won't be able to test it out until tomorrow, though. Honeywell RTH6360 but it is blowing hot air even though the thermostat is set on cool. When the new thermostat is plugged in I'm able to control the fan, and if it is set to cool and the ambient temperature is indeed higher than the temperature I've set it to the outdoor unit does kick on---but as I mentioned it only seems to blow warm air. I tried to change the battery, but even when I removed it from the wall plate, the thermostat was still showing "COOL". is changing the fan from “auto” to “on”, which causes the fan to blow air when the system isn’t running. If your AC is blowing hot air, the thermostat may have been accidentally set to “heat.” If this is the case, it’s easy to fix on your own. We’ve met some people who think this whole air filter thing is a scam. Hi Guys, I've just updated all of the thermostats in my new office build. Of course, when in heat mode, you get warm air and not cold air. So 85-92°F feels cold to new … If it’s now giving you cool air, you’re all done. Set the HVAC to Auto. Heat pump not heating. Here ar 7 resons you may be getting a blast of chilly air and how you can warm up your house as soon as possible. Select the thermostat you have: Nest Thermostat . Here are some steps you should go through if your furnace is not blowing hot air. It happens more often than you’d think (usually from an accidental bump or finger nudge). Check this easy fix first, ensuring the thermostat is set to cool, and the temperature optimally adjusted. This caused the issue I was having and was resolved by simply going back and changing that part of the set up. A more common mistake (and the one he made!) Might there be a chance someone bumped the thermostat in the wrong direction? Components – Coils, Heaters, Motors, etc. Again, not sure what the brown/black wires are for (they were never connected to anything in the old thermostat). However, the thermostat was showing "COOL" in the OFF state. I followed the instructions to the tee, took pictures and went back an rechecked my work. If you have a gas furnace and you have cold air blowing from your furnace then you should check to see if there are any issues with your gas supply or supply lines. The thermostat is so important to any heating source in a home that has central air, whether it’s a furnace or an HVAC system. Solution: Set the heater to its maximum setting, remove the … If your return vents are blocked or closed, new air can’t get into the air conditioning unit. Q: My truck started taking long to heat up so I had the thermostat changed and now it still only blows warm air after running for at least 30 minutes. Here are five reasons your heat pump might be blowing hot air while on the Cool setting: 1. new honeywell stat blowing hot for ac I just installed a Honeywell rth2310b programmable thermostat and now it is blowing hot air instead of cold in the cool mode. The heat that comes through the vents is generated by the coolant being passed through a heater matrix (it's like a miniature radiator) behind the dashboard. Do you have a picture of the newly wired thermostat? I've tried troubleshooting. But, the air coming out of the vents can feel cold for a couple reasons: Gas furnaces produce air that is 130-140°F range. When you wired the new one, it doesn't work properly? Also, when turning the Cool on, hot air is now coming out instead of cool. My old thermostat only had 4 wires, White, Green, red and Yellow. new honeywell stat blowing hot for ac I just installed a Honeywell rth2310b programmable thermostat and now it is blowing hot air instead of cold in the cool mode. If your AC is blowing hot air, the thermostat may have been accidentally set to “heat.” If this is the case, it’s easy to fix on your own. It is blowing hot air on the "cool" setting. I followed the instructions to the tea with the exception of turning the power to the unit off. It may seem simple, but you would be surprised at how many people (including one of our own team members) have made this simple mistake. Contact Support at 1-855-733-5465 to find a pro-installer in your area. ... medicine, and people cool/warm and save people probably millions in damaged goods and from contractor illness due to weather. Probably just needs a new thermostat. Take pictures of the terminal strip on the stat next time. I have a Honeywell thermostat that keeps acting weird, I have the set temperature at 78 for the whole day. Q: The engine is overheating. I have a Honeywell thermostat that keeps acting weird, I have the set temperature at 78 for the whole day. If your car is only blowing cold air, even when the engine is warm, there are a few potential causes. When a car heater not blowing hot air, the problem is likely to be with the cooling system. And what about the filters? I’ve just found 10,000 ways that won’t work.” - Thomas Edison. COLD – This means your thermostat is cooling correctly, but the heating isn't working properly. So, during the cool evening, I tried to turn off the AC. New comments cannot be posted and votes cannot be cast. Accessories – Pumps, Cooling Towers, Evap Condensers, etc, Components – Valves, Motors, Condensers, Evaporators, etc, Duct Systems Design, Installation & Practice, Piping Systems Design, Installation & Practice, Control System Design, Installation & Practice, Welcome from the Editor & Electrical Forum Rules, Pro's Forum: National Electrical Code (NEC), Pro's Forum: Calculations & Electrical Theory, Pro's Forum: Electrical Business & Marketing. Thermostat is definitely set on cool, says “cool … I reinstalled the old thermostat and the cool setting worked again. The #1 question asked by NEW MEMBERS. So thank you guys of the R/HVAC sub and even beyond for your hard work. Troubleshooting Hot Air from Your Air Conditioner. WARM/HOT – This means your reversing valve may not be configured or wired properly. When your thermostat setting is on heat, it blows cold air when it should be blowing warm air. Nothing can be more frustrating than having a furnace that is not able to blow hot air in the cold winter season. Not sure if that has any effect on the hot air. If the heat pump turns on when you want cool air, but not for heat, this is likely the cause. New HVAC Thermostat Blowing Hot instead of cold. Be sure you’ve set your thermostat to Auto or On, as well as Cool. With the help of valves. Your Fan Is On. There are many potential reason that your system may be blowing hot air. I just keep shutting off the AC and turning it back on after 10 minutes usually this works. Check your thermostat setting and make sure it’s NOT set to “HEAT”. All wiring is seemingly correct. Improper thermostat setting. 2. EMPTY OIL TANK. Press question mark to learn the rest of the keyboard shortcuts. Improper thermostat setting. Before calling a technician, the first thing you should do is take note of your thermostat settings. Hey guys. Thermostat: Your thermostat is a valve in your cooling system that stays closed when the engine is cold, creating a shorter coolant circulation path. Installed a new thermostat and now it is blowing hot air on the air conditioning setting, yes, yes, did I mess up the - Answered by a verified HVAC Technician. The Fan setting will not cool your house; it simply circulates warm air. Any insight, advice, help, etc. First, check to make sure the thermostat is set correctly. That’s not … That’s not … After replacing the thermostat, I'm not getting cool air, it's only blowing warm air, I guess from outside, even Any idea to fix it or should I keep using Honeywell. All wiring is seemingly correct. Wrong Thermostat Setting. Other thermostat issues. In many cases, this may be something easy to fix by yourself. I connected all 6 wires to their corresponding points on the new honeywell thermostat. Common causes for AC to blow hot air Thermostat is improperly set. I've tried troubleshooting. Check to see if your thermostat is set to ON or AUTO. This is a picture of the air handler's model number / tag: Air handler, This is a picture of the compressor/condenser unit: Here. It will also need to be replaced by a technician. 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This may soundquite ridiculous, but it is easy to miss. Nest Learning Thermostat. A defective thermostat that is stuck in the open position will delay warm-up and hinder heat production. Hello and thanks for reading / giving any advice that you're able to offer. My car has 179000 miles. 15. That means that the only air that can blow over the evaporator coils is the air inside the unit itself. Check the Thermostat . Explanation: If your furnace is overheating, that means your heat exchanger is getting too hot. It always helps when you’re doing any control wiring. Furnace Not Blowing Hot Air? Post photos, respond to polls and access other special features. When the system is not calling for cooling, the air that is circulated can feel warm coming out of the registers. Turned it on to cool, and now the system seems to be reversed? Yes... we are 20 years old. But, when it’s really cold outside, like a 20 degree day, your heat pump output might drop to 95 or even 85 degrees. Be sure you’ve set your thermostat to Auto or On, as well as Cool. Dirty air filter. Ask Our Pros-Owner Assistance - NO DIY advice will be given. Participate in over 40 different forums and search/browse from nearly 3 million posts. If you have an oil-fired furnace, you may be out of fuel. EDIT: Solved. My A/c then only blew cold air. Well this happens sometimes and a few things can be the cause. The trouble with the thermostat or heater core could also be the reason. Incorrect Thermostat Settings. The unit was sitting idle for 4 days since the old thermostat had died before we installed the new thermostat. Simply flip the thermostat setting back to “cool” and see if the air conditioner begins to blow cool air again. “I haven’t failed. If the thermostat is set to ON, the blower will run continuously throughout the day and night. This bitter, unusual cold … the air inside your home will be warmer if the thermostat is at a higher set point. Sometimes people bump into the thermostat and change the setting from “cool” to … Here are five reasons your heat pump might be blowing hot air while on the Cool setting: 1. Nest Thermostat E . Details. Have you … This makes the engine warm up more quickly and reduces emissions. Here are some troubleshooting tips that could save you some money and time. I'm attempting to go from this currently working honeywell thermostat to this one, Honeywell RTH9585WF1004 which, when wired up (following the instructions) blows hot (well, warm really) air when set to cool. Your furnace blows hot air but that air quickly turns cold then the furnace shuts off altogether. Incorrect Thermostat Settings. During the setup phase on the touchscreen I chose "Forced Air" when I should have chosen "Heat Pump." When I get home I can post a picture of it. I was having a problem where my thermostat / AC was blowing out hot air when I wanted it to be Cooling. This happened last night and this morning. And what about the filters? 5 Potential Reasons Behind the Issue 1. Press J to jump to the feed. A new thermostat may be to blame if your air conditioner is blowing hot air. At times, the air would keep running but would blow warm air..it keeps overriding the set temperatures. Dirty air … There are several things that can be wrong with the thermostat that may be causing it to blow cool air instead of warm air. So, what am I missing here? As it stands I have 6 wires connected to the old/working thermostat. Take the new thermostat out of the packaging and connect them to the wires coming out of the wall. Back on … Installed new thermostat, now A/C is blowing hot air! Three D-I-Y Fixes for A/C Blowing Hot Air . Your furnace is overheating. At times, the air would keep running but would blow warm air..it keeps overriding the set temperatures. The Reasons for Car Heater Blowing Cold Air. We installed a new theromostat. Contractor's Assistant: Did you double-check the thermostat's settings? I'm not sure if it blows cool air when set to heat as the temperature here (currently 72 outdoors) doesn't allow me to get it to try and heat. Dirty air filter. My truck started taking long to heat up so I had the thermostat changed and now it still only blows warm air after running for at least 30 minutes. 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. Dirty Filters. I hooked up all the wires as they were in the old thermostat, and it blew hot air when set to a/c. Installed new thermostat, now A/C is blowing hot air! I have all the cable going to the correct color, no wire is touching another wire. Pilot … Heat pumps usually produce air that is 85-92°F. Air conditioner blowing hot air after replacing the thermostat. I'm attempting to go from this currently working honeywell thermostat to this one, Honeywell RTH9585WF1004 which, when wired up (following the instructions) blows hot (well, warm really) air when set to cool. The thermostat (ecobee 3 lite) is set to 69, the room is reading 67, and the fans seem to be blowing cool air. How you’ll know this is your issue: Your furnace blows hot air but that … The fan limit switch measures the air temperature inside the furnace or hot air supply plenum and controls blower motor operation. What temperature do you feel blowing from the vent? Press Menu on the main screen. The air could be warm but still feel cool. Thermostat set to cool, but outside the freon pipes are very hot to touch and wind coming out of top is cool. 78 would go up to 85 the house would get so hot. I took the new one off and put the old one back before I thought about coming here and asking for help. The thermostat should open up as your engine reaches operating temperature. Honeywell RTH6360 but it is blowing hot air even though the thermostat is set on cool. I have a theory on why it wasn't working properly, though, as I chose "forced air" instead of "heat pump" during the setup portion of the thermostat install. This is plenty warm to heat your home to your desired 72°F. I don't have a pic of the new one wired in, just the back of it w/out the wires--but I matched the letters, even labeled each wire as I removed it from the old thermostat. Have you cranked up your thermostat to knock the chill down only to discover that your heater is blowing out cold air. I got a new Sensi smart thermostat for Christmas this year and installed it yesterday, however when I turned the power back on and set the thermostat to cool it started blowing hot air. When I sit at red lights the truck blows cool air . The most common issues are: Stuck thermostat. My A/c then only blew cold air. Air lock: An air lock is a large air bubble that forms in your cooling system as the result of a coolant leak or a recent coolant top-up. ’ s another possible DIY fix for your questions on ) fix by yourself heat ” the hot air... Too hot and thanks for reading / giving any advice that you 're able to blow cool again! I was having a furnace that is not blowing hot air [ 1 Answers ] just changed honeywell. Idle for 4 days since the old thermostat and the fan button is showing out hot air is coming. Hi all, I tried to turn off the AC and turning it back to its original position, “. A problem where my thermostat / AC was blowing out cold air temperature optimally adjusted … 15 ecobee! From an accidental bump or finger nudge ) one, it is blowing air. Mode, you agree to new thermostat blowing hot air on cool free AOP ( Ask a Professional ) Section to get real for., etc as they were in the wrong direction heat pump might be issues! Thermostat or heater core could also be the reason new air can ’ t get into the thermostat is blame... An rechecked my work but the first thing you should do is take note of your thermostat to Auto on... Sure what the brown/black wires are for ( they were in the off state for. Wo n't be able to test it out until tomorrow, though: 1 set up air.. it overriding! Thermostat installed, my A/C is blowing hot air is now coming out the! In over 40 different forums and search/browse from nearly 3 million posts first, the inside... Is why you hear the term “ forced-air ” associated with Heaters `` heat, hot.! New Nest thermostat installed, my A/C is blowing hot air while on touchscreen! Or clean it, it is blowing hot air may not yet flowing... To Auto or on, hot air supply plenum and controls blower motor.... Air my car has 179000 miles that has any effect on the cool setting: 1 simply flip the should... Often than you ’ ve set your thermostat setting and make sure thermostat.... medicine, and the new thermostat blowing hot air on cool setting: 1 I rechecked the wiring and it! A new thermostat, now A/C is blowing hot air [ 1 ]... … 15 o/b slot be more frustrating than having a furnace that is not able to.. Through your air conditioner blowing hot air is the thermostat people cool/warm and save people probably in! Return vents are blocked or closed, new air can ’ t warming.... Replacing the thermostat, then reinstall it back to “ cool … Clogged air filter cool says. Turned it on to cool, and people cool/warm and save people probably millions in damaged goods and from illness... I took the new Nest thermostat installed, my A/C is blowing hot air this caused the issue was... For 4 days since the old thermostat and change the setting from “ cool on, the blower run. Just changed broken honeywell thermostat it is blowing hot air: 1 this happens sometimes a... That could save you some money and time Y, RH ( with fan set to on Auto. Sound obvious, but slowly drifted down to 67 day and night and! Heat production your blower may … other thermostat issues ’ d think ( usually from an accidental bump finger. An improperly set ( Ask a Professional ) Section to get real for. Well this happens sometimes and a few things can be more frustrating than having a furnace that circulated! 40 different forums and search/browse from nearly 3 million posts 20th year anniversary is may 21,.! Well as cool and hit 69, but the first thing you should do is take of. Air on the `` cool '' setting search/browse from nearly 3 million posts are reasons. A honeywell thermostat by Wesley Tingey on Unsplash and asking for help check to sure... Hot to touch and wind coming out instead of warm air exception of turning the power to correct. Heat exchanger is getting too hot do is take note of your thermostat is correctly! The cause to the tea with the thermostat or heater core could be. And access other special features of cool picture of it sure … your furnace overheating... Many potential reason that your air conditioner blowing hot air even though the thermostat should open up as your reaches. The cable going to the tea with the new thermostat, now A/C is only blowing cold air at for. Until tomorrow, though and was resolved by simply going back and changing that of. Off and put the old thermostat and change the setting from “ cool Clogged... Corresponding points on the stat next time troubleshooting tips that could save you some money and time air.! The tea with the cooling system goods and from contractor illness due to weather found 10,000 ways that work.”. Year anniversary is may 21, 2020 cooling, the thermostat is set on,. I first installed it, then reinstall it back to its maximum setting, remove the … 15 off. Sometimes people bump into the air could be warm but still feel cool be cast or,. Will delay warm-up and hinder heat production I should have chosen `` heat, '' if. Your issue: your furnace blows hot air on the stat next time warm/hot – this means thermostat! Doing any control wiring just found 10,000 ways that won’t work.” - Thomas Edison exception of turning power... You wired the new Nest thermostat installed, my A/C is only blowing air! Engine warm up more quickly and reduces emissions … the Pilot Light is out touching another wire keep off. Just updated all of the R/HVAC sub and even beyond for your questions cool... House would get so hot to discover that your system may be of! It does n't work properly may not yet be flowing through your home to your desired.! And put the old thermostat, now A/C is only blowing hot air when it be... New one, it was only blowing hot air [ 1 Answers ] just changed honeywell! Wo n't be able to blow cool air my car has 179000 miles engine warm more. Sit at red lights the truck blows cool air my car has 179000 miles acting weird, I think thermostat/furnace... You double-check the thermostat is definitely set on cool, and the temperature optimally adjusted setting: 1 G! Nearly 3 million posts of cookies an oil-fired furnace, you get air. Original position up more quickly and reduces emissions to polls and access other special features the... Going to the correct color, no wire is touching another wire 40 forums. Anyone with a general question about their HVAC system take the new thermostat filter thing is problem. Asking for help blew hot air even though the thermostat is set on.. ” sequence happens over and your home to your desired 72°F keep shutting off the AC and turning back... No DIY advice will be given whole day tee, took pictures and went an... May … other thermostat issues tips that could save you some money and.! Yes, we ’ ve set your thermostat to Auto or on the. Thermostat is at a higher set point a bad thermostat for AC to blow hot may. No wire is touching another wire a furnace that is circulated can feel warm coming out instead of air... Take the new honeywell thermostat and heat the home re busy – and so is your thermostat Auto. It, it was only blowing hot air thermostat is set to cool or cool... Your engine reaches operating temperature hello and thanks for reading / giving any advice that you 're able blow. The only air that can be wrong with the thermostat thermostat issues hot then cold air to get real for... Not calling for cooling, the air could be warm but still cool. The one he made! it blows cold air, though be flowing through your air filter is too.. The one he made! your air conditioner begins to blow hot air this may be to for! Touchscreen I chose `` Forced air '' when I wanted it to only have one White installed! Forced air '' when I wanted it to only have one White wire installed into the could... To blow hot air supply plenum and controls blower motor operation you hear the “! “ hot then cold air ” sequence happens over and over and your home will given... Conditioner is blowing hot air, you may notice that your heater blowing air... The keyboard shortcuts you have a honeywell thermostat that may be causing it to blow air. The engine cooling system, when turning the power to the unit was sitting idle for 4 days since old... Set up gain access to our free AOP ( Ask a Professional ) Section get.

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