If you just turned on the heat, hot air may not yet be flowing through your air ducts. Attempting to make this question the end all for "my furnace is blowing cold" In my case, I had a furnace that just "blew cold" forever. If your furnace is blowing cold air, we’re sorry! Thanks for this as it did the trick for me as well! 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. This is actually a common problem that doesn’t really have a simple answer. It’s a chilly problem that no one should have to deal with during winter in the Atlanta area! I think my Nest thermostat is blowing cold air instead of hot. I honestly don’t mean this to be insulting, but you’d be surprised at how many times people are shocked to learn that neither your air conditioning nor your heater will be cold or hot right after you turn them on. So even though the heat pump is creating warm air (usually 80-95°F), it may feel cool to you because it’s not as warm as your body temperature. There are many possible causes, so let’s explore some of the most common ones. After a bit of research, I learned that my unit works by sending power to a hot surface ignitor, sending gas in that direction to ignite it and boom ya got some heat. To troubleshoot a misbehaving gas furnace, start with the easiest explanations and solutions, then work your way to the most complicated. New comments cannot be posted and votes cannot be cast. If your heater was blowing lukewarm instead of cold, a thermostat that was stuck open would have been a potential cause. In your case: White - W2 Green - G Orange - I can't tell if it is W1 or W3 or just W in your picture. 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. Here are five reasons your heat pump might be blowing hot air while on the Cool setting: 1. The nest seems to blow warm air normally but once it switches to alternative heat source, then it starts blowing cold air. It is a story many people know all too well: the air conditioner is blowing hot air. It seems cold air is now blowing out of the intake vent and hot air is blowing out of the vents. If your forced-air gas furnace is blowing cold air, a number of factors could be to blame—many of which you can address on your own, without the immediate help of a service professional. Freon AC Refill: http://amzn.to/2HPlaLAHow to fix car blowing hot air when AC is on. Even if you are not a DIY home technician, there are generally only a few reasons why your heater might be blowing cold air. The top three reasons why a furnace might be blowing cold air instead of warm are include: The Thermostat is set to ‘ON’: ask any professional heating repair man what the first item they check when they are on a heating repair call and most of them will reply ‘the thermostat’. The heater’s blowing cold, or the AC is blowing hot. 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. 7. 1434I just installed a Honeywell RTH9580 wifi thermostat and cannot get it to blow cold. I (with the help of my neighbor) installed my a Nest Thermostat E last week. Be sure you’ve set your thermostat to Auto or On, as well as Cool. Press question mark to learn the rest of the keyboard shortcuts. Gas heater isn't coming on [ 1 Answers ] Our heater is running all the time. Be sure you’ve set your thermostat to … If your furnace is blowing cold air some of the time, but working otherwise, there are a few possible reasons for the problem. That did the trick. Nothing would happen after that other than the furnace turning on and blowing air from outside into the house. So, I knew the furnace had power, and the Nest was talking to the furnace. It blows cold air, and if I turn the switch off on the side of the unit, then turn it back on, it will fire up the gas and start blowing hot air again. If so, your heat pump is blowing warm air that just feels cold to you. I live with my roommate who has a Nest thermostat. Pilot Light Issues When I turned on the cool mode (and after the warming up period) it starts to blow warm/hot air. So your car's AC was doing fine for the longest time. New comments cannot be posted and votes cannot be cast. Check these basic issues before calling in a professional technician! Then blink 8 red blinks for an hour, while blowing cold air… This problem could be mainly because of the wrong wiring connection. Initially it would fire on, then shut off, fire on, shut off, 5x. Either way, the Nest seems to only blow hot air on both Cool and Heat modes. Land your white wire on W2/Aux and put your orange wire on O/B. Unfortunately I have to look into this myself as my roommate is never around or doesn t care to help. From what I was reading, however, the blue wire, when connected to Common, would only help to charge the Nest unit. The heat pump may be blowing warm air; it just does not “feel” warm. Nest thermostat turns ON AC instead of heat. Causes and how to prevent it from happening again: Inside of the unit, condensation can occur on … level 2 There are other reasons your heat pump could be blowing cold air instead of heat, but those are the basics. I pulled it out and it had no cracks in it, and I used a multimeter to check the resistance, which showed 67.6, which is fine. -I tried changing the intake direction of the pump. I feel like my downstairs blows not so warm air, I'm used to being able to touch the vent and it be warm, but in my new house the heat is def working according to the thermostat but the vent isn't warm. About $1K later, he returned the vehicle to me, and the A/C worked about one hour, and even then wasn't super cold. The Fan setting will not cool your house; it simply circulates warm air. No dice. We can schedule an estimate for your duct sealing in Cincinnati, Morrow, Lebanon, or the surrounding areas in Ohio. I knew it wasn't the Nest having an issue because it was running smoothly. Check The Thermostat. Incorrect Thermostat Settings. A friend of ours bought a new house recently. Here are just a few things that could mean: 1) Dead Batteries in Thermostat Gas heater isn't coming on [ 1 Answers ]. Got it hooked up, and discovered it was blowing hot air. So, I knew the furnace had power, and the Nest was talking to the furnace. If your ducts are leaking (and ENERGY STAR says that almost all homes leak about 30% of the air in their ducts), cold outside air is making its way into your ductwork. But here are 3 common causes you can fix yourself. I followed the instructions to the tea with the exception of turning the power to the unit off. Turns out it didn't blow cold forever. 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. This morning, I woke up and plugged it back in to see if it was simply a battery fix on the Nest unit itself. Update: While I see the unconnected blue wire behind my upstairs thermostat, it doesn't look like it's actually connected to the furnace. I then checked the power to the HSI through the harness, which showed no power. Is Your Heater Blowing Out Cold Air? I believe you then need to go into the settings of the nest and tell it to energize the reversing valve with O in cooling. 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. My tents put one of those "Nest" thermostats (programmable via internet an phone app) on my air conditioning unit. For these checks of power, I had to cycle the Nest to give power to the connections. Common causes for AC to blow hot air Thermostat is improperly set I did some research before posting here, and have tried the following: -double checked my wiring. Since - Answered by a verified HVAC Technician No dice. AC blows hot air during the day, but cold air at night You hear a hissing or bubbling noise near AC (this means the leak is significant) Unfortunately, the only way you’ll have low refrigerant levels is if you have a leak (refrigerant isn’t used up like gas, it’s in a closed-loop system). There are several possible causes for a furnace blowing cold air, so it’s hard to give you advice without more information. I see that you fixed it but in case it breaks again -- call Nest. We have two separate furnaces, so I was able to visibly compare the two systems. My A/C wasn't working (blowing hot air instead of cold), so I had some repairs done. Green G, orange O, white W2, red r, yellow y1, blue c. Just wanted to weigh in -- I had the same problem with the nest only blowing hot air no matter what, had to turn off the breaker to stop it. Instead, there's a second set of two wires going from C and Y1 on the furnace to some unknown location. But all you have to work with are the symptoms. My hvac unit blows cold air instead of hot. Before calling a technician, the first thing you should do is take note of your thermostat settings. Check if you see a flame. For instance, if it’s manually set to the Heat instead of Cool, or when the cooling range is set too high while the mode is set to Auto (eg. Because I had no power, I looked it up and basically found out I had to replace the whole board. If you are one of those unlucky people and dealing with a heater blowing out only cool air instead of hot, then there is a chance that it might be an easy problem to fix for the do it yourselfer. We have an upstairs and a downstairs furnace, so it was easier for me to compare the two and see how they worked. I think I'm going to have to call an actual Nest Pro. There are directions in the book what to do here. The liquid then flows through the radiator and the air absorbs the heat and uses a fan to push it through your vents. When the A/C is blowing hot air, you can get frustrated, but there is no reason to lose your cool. Then, gradually, you began to notice that it wasn't really blowing cold air anymore, or that it would only blow cold when the car was moving but not at idle. Or worse yet, you come out to start the car one day, turn on the AC and it's blowing barely cold air when it was fine just yesterday. Gmc :: Yukon AC Blowing Hot Air Instead Of Cold Feb 17, 2014. 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. It was not. Thermostatic Controls - Hot air blowing in cooling mode on Nest - I recently went from an old AC unit, to a new Nest 3rd Gen. First I was told it was some sort of bracket, replaced that. Does your furnace blow hot air sometimes, but cold air other times? Hey, y'all. One of the leading causes of airflow being restricted is having a dirty filter. But when your furnace is blowing cold air instead of heat – this can cause multiple problems. Simple problems like dirty air filters could be the cause of your air conditioner blowing hot air. I just installed a Honeywell rth2310b programmable thermostat and now it is blowing hot air instead of cold in the cool mode. Press J to jump to the feed. Discussion on Google Nest products, including installation and configuration. Blue - C Yellow - Y Red - R, bumpered into RC. Here’s why: The vent air’s temperature might be below your body temperature (which is about 98.6°F). Additionally, you want to make sure that the batteries are working and that the temperature is not set too high. (It worked perfectly in the winter with this setup) Looking at the furnace and NEST, the wiring is as follows: If you are one of those unlucky people and dealing with a heater blowing out only cool air instead of hot, then there is a chance that it might be an easy problem to fix for the do it yourselfer. The cooler air is what ends up blowing into your living areas. They said they have a known power sharing defect in the "base" of the nest where the wires go -- They are sending me a replacement base because when I took the heat wire out, the furnace stopped running . Your thermostat’s fan setting may be set to ON. Pulling the shell off of the furnace, there was the same blue wire, tucked behind the harness. There are many reasons an HVAC (heating, ventilation, air conditioning) system might stop working. Air trapped in the heater core. It’s a chilly problem that no one should have to deal with during winter in the Atlanta area! Got a Nest 3rd gen thermostat. So it’s midwinter and you notice that your heat pump is blowing cold air. Then the guy told me it was the compressor, replaced that. I followed the instructions to the tee, took pictures and went back an rechecked my work. My car ac is blowing hot air, supposed to be car air conditioning blows cold air instead of hot air. I followed the wiring guide and during the winter the Heating Stage 1 and do you not see the two + symbols to expand the photo? I don't know how you ended up becoming you, but don't ever stop. We have an upstairs and a downstairs furnace, so it was easier for me to compare the two and see how they worked. Here is a picture of stuff blowing out of intake vent. Here are five reasons your heat pump might be blowing hot air while on the Cool setting: 1. The house is not cooling down. I don't think the photos made it to the post. This is what we call a "No Cool", and it's a common air conditioning problem that may or may not be an easy fix. If you want to stop your vents from blowing out cold air while your furnace is running and save money on your monthly utility bills, contact Rick’s Heating & Cooling today. I had mis-placed the Y2 wire (white wire), so I corrected and placed it in w2 aux instead. So, I just got a Nest 2 for a forced air furnace system, and I installed it on the wall last night. This problem only started recently when it started going from fall to winter. Why is the Heater Blowing Cold Air Instead of Hot? Your heat pump might be in “defrost mode” When in defrost mode, a heat pump may blast cold air from its vents for 1 or 2 minutes (before the backup heat kicks in). 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. Press question mark to learn the rest of the keyboard shortcuts. I did some research before posting here, and have tried the following:-double checked my wiring. Lo and behold, I plugged those bad boys in and the HSI fired right up. I had mis-placed the Y2 wire (white wire), so I corrected and placed it in w2 aux instead. First warm weather using my nest thermostat and now trying to use the central air. Reset thermostat to factory. 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