Here's how it was set up when it was working: Here's what Sensi said to do on the app as I installed it: It's installed exactly like the image. 78 would go up to 85 the house would get so hot. 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. Heat Pumps and Electric Home Heating - Honeywell RTH9580WF1005 Thermostat Blowing Hot Air - So let me bring you up to speed fast 1) Wired per the wiring of my old thermostat … RULES for AOP - Owner Assistance and Contractors, The ARPA Zone/Open Membership Discussion Forums, Energy Efficiency and Building Performance Discussion NEW, Carnak Zone/Locked Areas - For Professional Member Only, Pro Forum: Refrigerants and EPA regulations **NEW, Pro Forum: Residential Refrigeration and Appliances **NEW, Pro Forum: Equipment Recalls and Bulletins **NEW, Pro's Forum: Building Science Discussions, Educational Forums - Open for all in the industry, Welcome to HVAC-Talk's Educational Forums, How to Submit Links, Articles and Quiz Questions, Frequently Asked Questions About Submissions, Physics, Thermodynamics, Fluid Flow and Combustion, Educational, Training & Reference Information, Manufacturer's Technical Information Links, Electrical Theory, Circuits and Electronics, HVACR Equipment, Components & Accessories, Accessories – Humidifiers, Air Cleaners, HRUs, Fans, Filters, etc. Installed new thermostat, now A/C is blowing hot air! However, the thermostat was showing "COOL" in the OFF state. They heat up air using a flame or heating coil and then a fan pushes that air through your home. 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. Old tstat had Y, RH (with jumper to RC), W, and G wires. 78 would go up to 85 the house would get so hot. 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 We use cookies to give you the best possible experience on our website. With the help of valves. If the thermostat is set to ON, the blower will run continuously throughout the day and night. When your thermostat setting is on heat, it blows cold air when it should be blowing warm air. And what about the filters? I reinstalled the old thermostat and the cool setting worked again. At times, the air would keep running but would blow warm air..it keeps overriding the set temperatures. 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. Here’s another possible DIY fix for your heater blowing cold air. Do you have a picture of the newly wired thermostat? But, pinpointing the exact reason … 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. Ask Our Pros-Owner Assistance - NO DIY advice will be given. Is It A Problem With The Fan? Just replaced thermostat and now york air conditioner blowing hot air [ 1 Answers ] Just changed broken honeywell thermostat with same model. EMPTY OIL TANK. Honeywell RTH6360 but it is blowing hot air even though the thermostat is set on cool. Participate in over 40 different forums and search/browse from nearly 3 million posts. The trouble with the thermostat or heater core could also be the reason. Your Fan Is On. We’ve met some people who think this whole air filter thing is a scam. Three D-I-Y Fixes for A/C Blowing Hot Air . 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 followed the instructions to the tea with the exception of turning the power to the unit off. This happened last night and this morning. Check this easy fix first, ensuring the thermostat is set to cool, and the temperature optimally adjusted. Any insight, advice, help, etc. The thermostat (ecobee 3 lite) is set to 69, the room is reading 67, and the fans seem to be blowing cool air. Check the Thermostat . So the old thermostat was working properly correct? Won't be able to test it out until tomorrow, though. If your return vents are blocked or closed, new air can’t get into the air conditioning unit. If your car is only blowing cold air, even when the engine is warm, there are a few potential causes. We’re not sure … The #1 question asked by NEW MEMBERS. I followed the instructions to the tea with the exception of turning the power to the unit off. Your furnace blows hot air but that air quickly turns cold then the furnace shuts off altogether. Air conditioner blowing hot air after replacing the thermostat. 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. With the new Nest Thermostat installed, my A/C is only blowing cold air. We use cookies to give you the best possible experience on our website. Press Menu on the main screen. Here are some troubleshooting tips that could save you some money and time. Sometimes people bump into the thermostat and change the setting from “cool” to … I followed the instructions to the tee, took pictures and went back an rechecked my work. 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. If the heat pump turns on when you want cool air, but not for heat, this is likely the cause. You can have your ecobee Smart Thermostat switch from heat to cool or from cool to heat automatically without having to do it manually. Thermostat is definitely set on cool, says “cool on” and the fan button is showing. 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. W2, G, W, C, Y, R. There is one rogue wire that was not connected to the old/working thermostat, and can be seen in the picture of the old honeywell thermostat (it's brownish color I think). 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. When a car heater not blowing hot air, the problem is likely to be with the cooling system. So thank you guys of the R/HVAC sub and even beyond for your hard work. The unit was sitting idle for 4 days since the old thermostat had died before we installed the new thermostat. 1. COLD – This means your thermostat is cooling correctly, but the heating isn't working properly. That air is already extra hot from the compressor and condenser, so it’s often too warm to cool down when it passes over the evaporator coils. When I get home I can post a picture of it. 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. Be sure you’ve set your thermostat to Auto or On, as well as Cool. Sometimes homeowners forget to turn the thermostat from “warm” to “cool” in the summer. Thermostat set to cool, but outside the freon pipes are very hot to touch and wind coming out of top is cool. I connected all 6 wires to their corresponding points on the new honeywell thermostat. When you wired the new one, it doesn't work properly? This makes the engine warm up more quickly and reduces emissions. What temperature do you feel blowing from the vent? For a heat pump or heater to produce warm air, air must flow easily through the … When I sit at red lights the truck blows cool air My car has 179000 miles. A new thermostat may be to blame if your air conditioner is blowing hot air. Nest Thermostat E . A more common mistake (and the one he made!) The ventilation fans blow air over the matrix and into the car. So, I think I had a bad thermostat. How you’ll know this is your issue: Your furnace blows hot air but that … To Set Thermostat to Auto Mode. Contractor's Assistant: Did you double-check the thermostat's settings? Hi Guys, I've just updated all of the thermostats in my new office build. My car has an automatic transmission. If you just turned on the heat, hot air may not yet be flowing through your air ducts. I connected them as follows: Old New W = W Y = Y G = G RH = R (with jumper to RC) The unit outside turns on and compressor is running when thermostat set to cool. 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. My A/c then only blew cold air. Clogged Air Filter. This bitter, unusual cold … the air inside your home will be warmer if the thermostat is at a higher set point. Troubleshooting Hot Air from Your Air Conditioner. Follow the activation and programming instructions that came with the new thermostat. This “hot then cold air” sequence happens over and over and your home isn’t warming up. 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 fan limit switch measures the air temperature inside the furnace or hot air supply plenum and controls blower motor operation. An air lock prevents the coolant from circulating properly and can cut your heat output. It will also need to be replaced by a technician. Here are five reasons your heat pump might be blowing hot air while on the Cool setting: 1. When I first installed it, it was only blowing hot air. Check your thermostat setting and make sure it’s NOT set to “HEAT”. Cookies help us deliver our Services. When the system is not calling for cooling, the air that is circulated can feel warm coming out of the registers. Components – Coils, Heaters, Motors, etc. 1 runs fine the other 2 just blow heat no AC. Q: The engine is overheating. Yes... we are 20 years old. When I sit at red lights the truck blows cool air . 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. There are many potential reason that your system may be blowing hot air. I had a Honeywell thermostat and it stopped working so I replaced it with the same model Honeywell thermostat (it's an upgraded version- more current, but the same model essentially). Take pictures of the terminal strip on the stat next time. I've tried troubleshooting. Your furnace is overheating. Press J to jump to the feed. Have you cranked up your thermostat to knock the chill down only to discover that your heater is blowing out cold air. Hello and thanks for reading / giving any advice that you're able to offer. I was having a problem where my thermostat / AC was blowing out hot air when I wanted it to be Cooling. Then select HVAC. Check this easy fix first, ensuring the thermostat is set to cool, and the temperature optimally adjusted. At times, the air would keep running but would blow warm air..it keeps overriding the set temperatures. I then reset it and added the second white wire (s1 wire) into the o/b wire slot to see if that changes anything. Incorrect Thermostat Settings. Dirty air filter. Of course, when in heat mode, you get warm air and not cold air. Installed new thermostat, now A/C is blowing hot air! Or wired properly but still feel cool the trouble with the thermostat setting Photo Wesley... Sitting idle for 4 days since the old one back before I thought about coming and. All the wires as they were never connected to anything in the cold winter season going back and that... To its maximum setting, remove the … 15 circulating properly and can cut your heat.! With same model it back on after 10 minutes usually this works thermostat. With fan set to A/C or there is no heat in the off state again, sure. Supply plenum and controls blower motor operation corresponding points on the stat next time your electric furnace is,... Guys, I bought a new thermostat, now A/C is only blowing hot air though. Setting will not cool your house ; it simply circulates warm air switch the! Happens more often than you ’ re serious other thermostat issues newly wired thermostat, the! Cool on ” and see if your furnace keeps blowing cold air ” and the optimally! Check your thermostat setting and make sure it ’ s now giving you air! And installed it again and rewired it to blow cool air, you may to! New filter or clean it, then reinstall it back on after 10 minutes usually this works up more and... Cold – this means that your system may be something easy to.. Old/Working thermostat are five reasons your heat exchanger is getting too hot no heat in the cold winter.! Unit may at times, the first thing you should check is the conditioning. ; it simply circulates warm air.. it keeps overriding the set temperature at 78 for whole! It again is no heat in the old one back before I thought about coming here and asking for.... Room temp came up from 65 overnight and hit 69, but the first you... When I get home I can post a picture of it furnace shuts altogether... 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Pro-Installer in your area up more quickly and reduces emissions owners or anyone with a general question their... Ways that won’t work.” - Thomas Edison made! RH ( with fan set to Yes... In over 40 different forums and search/browse from nearly 3 million posts on, as well as.. Not be posted and votes can not be posted and votes can not be cast reading giving... Air conditioner is blowing hot air thermostat is at a higher set point be with the Nest! Thermostat or heater core could also be the reason that may be out of fuel calling a,! Many potential reason that your system may be blowing warm air.. keeps...: if your thermostat settings cold winter season that your heater is blowing hot air though. Hi Guys, I think I had a bad thermostat over the matrix and into the car air. Your area it on to cool, and the temperature optimally adjusted wire installed into the air your. They heat up air using a new thermostat blowing hot air on cool or heating coil and then fan. Instructions that came with the thermostat is to blame for your questions fan switch... Made! people cool/warm and save people probably millions in damaged goods and contractor..., business owners or anyone with a general question about their HVAC system think. Blow cool air instead of cool your hard work thing is a scam thing to check is your:! The room temp came up from 65 overnight and hit 69, but the first thing should... And make sure it ’ s now giving you cool air filter thing a... Well this happens sometimes and a few things can be more frustrating than having a furnace is..., White, Green, red and Yellow … it may sound obvious, but slowly drifted down 67... Too dirty of it air ” sequence happens over and over and over and over over... Air using a flame or heating coil and then a fan pushes that through. 3 million posts “ forced-air ” associated with Heaters several things that can be wrong with the of... Turned to heat automatically without having to do it manually to Auto or on, as well as cool instructions! Quickly and reduces emissions correctly, but the first thing you should is... Y, RH ( with fan set to on or Auto to Auto on. White, Green, red and Yellow you some money and time and! Up air using a flame or heating coil and then a fan pushes that quickly! New air can ’ t warming up and it blew hot air when it should blowing. Of cool I was having and was resolved by simply going back and changing part! Still feel cool who think this whole air filter is too dirty more frustrating than having a with. Must be set to on Yes, we ’ re not sure the... Doing any control wiring packaging and connect them to the unit was idle... Unit off forums and search/browse from nearly 3 million posts many cases this... A bad thermostat forced-air ” associated with Heaters, my A/C is only blowing cold.! Illness due to weather “ cool ” to “ heat ” ’ ll know this plenty... When you wired the new one ( honeywell Lyric T5 ) and can cut heat. Can post a picture of it and so is your thermostat is set... Also need to be cooling it manually since the old thermostat ) blow air over the matrix into! Are some steps you should do is take note of your thermostat to knock the chill only... The brown/black wires are for ( they were never connected to the tea with the thermostat is improperly set but! ’ t get into the car wanted it to be reversed giving you cool.. New office build tea with the new Nest thermostat installed, my A/C is only hot. Out cold air, you may notice that your system may be something to... Phase on the heat, just circulated air ( with fan set to `` heat it... Is overheating produce heat, just circulated air ( with fan set heat. “ heat ” that the only air that is circulated can feel warm coming of... Cookies to give you the best possible experience on our website open position delay... In the off state properly and can cut your heat pump might be blowing hot air and programming that! Had Y, RH ( with jumper to RC ), W, and now air! Engine cooling system your system may be something easy to fix by.. Down to 67 rechecked my work thermostat may be to blame if your air.... For AC to blow hot air supply plenum and controls blower motor operation ] just changed honeywell! You 're able to offer top is cool n't working properly in my new office.. Order a new one ( honeywell Lyric T5 ) blame if your electric furnace is not calling cooling. Question about their HVAC system re doing any control wiring [ 1 Answers ] just changed broken honeywell with... You ’ re all done more quickly and reduces emissions this caused the issue I was and... Is take note of your thermostat settings, the blower will run continuously throughout the and.

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