Haven’t had any issues with it until the past few weeks. Furnaces tend to put out about 130 to 140 degree air. Similarly, air conditioners can blow air as cold as 55 degrees, which is a lower temperature than the cool air from a heat pump. You might have a failed heat strip kit as heat strips are a common emergency heat source for heat pumps. A furnace typically puts out air at around 130 degrees, whereas warm air from a heat pump is only a little over 90 degrees on a moderately cold day. Problems that will cause your heat pump to blow cold air in the winter include: Your heat pump condenser tripped the breaker, so its blowing cold air. If the heat pump isn’t working at all but the air handler and blower are working fine, then the device will simply blow cold air from outside or possibly even just recycled cold air from inside. I hired a hvac guy to inspect it. If the heat pump turns on when you want cool air, but not for heat, this is likely the cause. Broken reversing valve: As the name suggests, the reversing valve allows the heat pump to work as both a heater and an air conditioner by reversing the direction of the refrigerant. It will also need to be replaced by a technician. When set to AUTO, your heat pump will only blow air when it’s heated. This kicks on if your heat pump can’t handle things in its usual way. Did you find this article helpful? Luckily, almost all of them are an easy fix for a certified heat pump repair team. Heat pumps have one drawback: They lose efficiency as the temperature drops. For now you could pull the Nest off of its base and disconnect the wires going to W1 and W2. https://nest.com/support/article/How-does-Nest-manage-different-stages-of-heating-and-cooling. May be something as simple as a switch or breaker is turned off. Hi, Heat pumps will only give heat above 32 degrees and will blow cold air it temp is below that. The air coming from your supply vent should be anywhere from 15-30 degrees hotter than the air near your return vent (depending on how cold it is outside). some systems have the wires 'crossed'. This transfer of warm air to your outdoor unit helps to melt any ice on your outdoor unit. If it gets too cold outside, your heat pump’s outdoor unit may freeze, causing your system to go into defrost mode. In contrast, a heat pump running by itself (with no supplemental backup heat) on a 35 degree day, depending on indoor house temperature might only put out 92 degree air. If you want to learn more about the heat pump defrost cycle, check out our blog, “Heat Pump Defrost Cycle”. The furnace has a difficult time generating heat if there isn’t enough airflow into the unit. Probably a stupid question but is it a fan setting? Check It’s Size. Your heat pump might be marathoning due to these reasons: We’re having a cold winter. Like say it out loud to yourself while you’re doing it. Well, heat pumps actually heat your home by absorbing heat from the air outside, drawing that heat inside, and using that heat to warm up your home’s air. Came home to a house at 108 degrees after a weekend visiting friends. As we mentioned above, your heat pump heats your home by drawing in warm air from outside. Make sure the thermostat is set to “AUTO”, not “ON”. Get up-to-date current news, promotions and industry tips. To find out if your heat pump is actually blowing cold air, hold a thermometer up to the supply vent (the ones that blow out air) then hold it up to a return vent (the ones that suck air in). After installing the Nest Thermostat, my system seems to be having trouble calling for Auxiliary Heat. This problem only started recently when it started going from fall to winter. Not sure the - Answered by a verified HVAC Technician We use cookies to give you the best possible experience on our website. This is above my head but this article may help: https://nest.com/support/article/How-does-Nest-manage-different-stages-of-heating-and-cooling. Possible Conclusion 2: There’s a Problem that Needs Repair. But when the winter weather drops to 40 degrees, that means your system will blow air … Set the thermostat to cool mode, a few degrees below your room’s temperature, so the thermostat calls for cooling. New comments cannot be posted and votes cannot be cast. Generally speaking, a heat pump will produce air that is about 55 degrees warmer than the outside air. By using our Services or clicking I agree, you agree to our use of cookies. Off topic here, but did you drop your Nest thermostat? Refrigerant circulates in a closed-loop system, so if your system is low on refrigerant, there's a leak. Sign up now. Heat pumps work much more gradually, and maintain comfort by keeping a steady flow of warm air … Emergency Heat is typically triggered when it is 35°F and below outside. Here’s why: The average body temperature is around 98.6 °F. That includes electrical problems such as bad compressor contactor. And, in cold weather, heat pumps tend to blow warm air out at 95°F. If your heat pump is blowing some cold air, there are a few things that may be going wrong. Here our experts at M&M Heating & Air Conditioning explain why this happens and whether or not it’s a cause for concern. Heat Pump Troubleshooting Problem #3: BLOWING COLD IN HEAT MODE First of all, just check and make sure your unit was not accidentally switched to a/c mode. This setting should be set to AUTO, not ON. If your compressor is dirty or clogged with debris, it's time to get it professionally cleaned. What you might have is heat strips in your AC unit rather than a heat pump and in that case you would get heat. To protect the outdoor coils from freezing up in the winter, heat pumps go through a defrosting period every hour or so in which they are truly blowing out cold air. There … Is the Pilot Light lit? Be sure the indoor vents aren’t blocked. It blows cold air when the heat is on. But, when it’s really cold outside, like a 20 degree day, your heat pump output might drop to 95 or even 85 degrees. When in defrost mode, your heat pump starts transferring heat out of your home (towards your outdoor unit) instead of transferring heat inside your home. Do you use propane for back up heat? The reversing valve not shifting properly. IE. When set to “ON” the fan will stay on even when your heat pump isn’t actually heating. If gas supply is interrupted for any reason, the gas furnace pilot light will go out. Below freezing, your heat pump simply can’t draw enough heat from the cold air outside and will kick on its auxiliary heat mode to generate heat for your home. If your heat pump is blowing cold air, look outside and see if your outdoor unit is frozen or has frost on it. So what’s defrost mode? It's all part of the process of heating your home with a heat pump! After installing the Nest, during the heat pump test, my system blows warm air just fine.BUT, for the aux heat test, the air is not warm, and feels like room temp or slightly colder.. This could be one of the simplest reasons why your thermostat clicks, but you have no heat or air. I am troubleshooting a nest thermostat that is blowing cool/cold air when it's supposed to be heating. Literally a wire was in the wrong hole. To solve the problem, try these 2 things: Turn off the heat at the thermostat and check your air filter. Do you know what setting it is to change? Arizona doesn’t get cold very often. 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. This problem only started recently when it started going from fall to winter. If your thermostat looks like this, make sure you change it to HEAT. My Heat Pump is Blowing Cold Air in “Heat” Mode! Blowing hot air means you probably wired it according to the conventional row on your old thermostat instead of the heat pump row. A pro will need to repair the leak as well as refill your refrigerant. If there is a leak in your refrigerant line, there won’t be enough refrigerant to draw in the proper amount of heat to warm up your home’s air. Moved into a new house a few months ago and it has a nest thermostat. Press J to jump to the feed. The reversing valve is the mechanical valve that switches your heat pump from cooling mode to heating mode. A heat pump puts out much cooler air than a gas or oil furnace does, which most customers are used to. 2) If you test your home’s air supply and find that your heat pump is blowing cold air, call and schedule an appointment with a professional who can fix your heat pump. There are a few reasons your heat pump could be blowing cold air. This should run the heat pump only. The “HEAT” setting will cause your heat pump to operate in heating mode and blow warm air instead, but only if there is a call from the thermostat. Your FAN setting should be set to AUTO, not ON. YOUR. Don’t worry, it happens more often than you think. Home; Plus, the colder it gets outside, the lower the temperature of the air a heat pump can produce. If the air from the supply vent is around 90 degrees, your heat pump is working fine. In either case, the heat pump isn’t running to heat the air and therefore, you’re getting whatever temperature it is outside. But when it does, having your heat pump blow cold air is the last thing you need. We’re not calling you crazy, but hear us out. If so, your heat pump is blowing warm air that just feels cold to you. I’m renting the house and it came with the nest. Alt heat means the heat pump is turned off and the other source (usually gas furnace) is asked to heat. It blows cold air when the heat is on. Cookies help us deliver our Services. If so, your heat pump is likely in defrost mode and you don’t need to call a technician. If this is your issue, you’ll need to contact a professional to come to check out your heat pump. Refrigerant is the substance that absorbs heat from the air outside and draws that heat into your home. This isn’t a problem when it’s 55 degrees outside—your system will expel air that’s a toasty warm 110 degrees or so. George Brazil Air Conditioning and Heating provides the Phoenix area with, body’s average temperature is around 98 degrees, Your heat pump is fine, you just think your heat pump is blowing “cold” air, Your heat pump is actually blowing cold air, in which case there is likely an issue with your system, Thermostat accidentally set to “cool” mode. Size is not a matter of preference. Next, check your outdoor unit is not iced over (see Heat Pump Troubleshooting Problem #1). However, your heat pump will struggle to absorb warmth from outside if the coils on the outdoor unit are dirty, clogged or blocked with debris (resulting in less heated air to your home). Another setting on your thermostat is your FAN setting. Check that shit 10 times. This happened to me. While this may seem like an issue, your heat pump can usually heat your home just fine, but when it’s extremely cold out (below 30 degrees), it just takes your system a little longer to do so. Learn more about the heat pump repair services we offer or…. If you recently turned your heat on, this could be the issue. 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). Check your thermostat and make sure that its set to HEAT, not COOL. So, even when a heat pump is working just fine, the air a heat pump circulates may feel “cold” compared to your body heat. If it was, it would have a spinning fan icon on the display. Think you may have an issue with your heat pump and want a skilled professional to take a look? Schedule your appointment (770) 421-8400 (770) 421-8400. Invest a few dollars in new high-quality air filters before you try anything else. However, if your heat pump doesn’t return to heating mode and you’re noticing cool air for a long period of time, you should reach out to a professional. Another reason why the air coming from your heat pump might feel chilly could be due to the fact that your body temperature is around 98.6°F and heat pumps blow air that is a temperature below that. theres a setting you can change to fix this. Run fan every hour for x mins.. The nest seems to blow warm air normally but once it switches to alternative heat source, then it starts blowing cold air. In this video we discuss a common question we get in the winter which is: Why is my heat pump not blowing hot air? The nest seems to blow warm air normally but once it switches to alternative heat source, then it starts blowing cold air. Heat pumps vary in this aspect, some energise the reversing valve in cool mode, some de-energize it in cooling mode... if the factory nest programming has the heat pump operating in heat when it should be in cool... they ask you to manually reverse that function (page 22 last item, its a set up operation, after that it will be automatic) If there is an issue with your reversing valve, your heat pump may actually be in cooling mode, in which case the air coming from your vents will be cold, not warm. Your heat pump may be working fine, but the air just feels cool to lukewarm. Ask our experts . The reversing valve is a vital component in heat pump … WIRING. Don't panic if steam comes out of the top of the outside equipment. Clean the pilot ignitor Save 10% when you book service online. If it looks like the one pictured above, it’s time to enlist a professional to come and clean it. Are you out of backup heat? If you’re trying to determine whether the cold air you’re feeling is a legitimate heat pump issue or not, we suggest you do the following... 1) Test your heat pump’s supply and return air with a thermometer. What to do if your heat pump is blowing cold air. Your body’s average temperature is around 98 degrees, whereas the air that heat pumps produce is typically cooler than that. When set to on, your heat pump will blow air whether it’s heated air or not. and temp is down to 29 degrees and heat pumps will not give any heat. … If it’s dirty, change it! It seems pretty warm, but 80 degrees is much cooler than the average body temperature (98.6 degrees Fahrenheit) and could feel like cold air blowing into the home. Damaged Ducts. Here is the old thermostat wiring: Original Thermostat Wiring This wiring was copied to the Nest: Nest Wiring Don't panic if you see frost on your outside equipment's coil. Below, we’ll go into each of these possibilities in more detail, to give you a better idea of why your heat pump is blowing cold air. It seems like an odd answer, but some homeowners just aren’t used to how a heat pump operates. We are Arizona’s most trusted HVAC pros and we’d be happy to help you repair any heat pump issues you’re facing. To make sure that your heat pump is actually blowing cold air, … The optimal heat pump temperature range is above 25-30 degrees Fahrenheit. If your heat pump continues to blow cold air for more than a few minutes, and your home’s thermostat indicates the temperature is dropping, first try a little troubleshooting: Check the air filter to be sure it’s clear. The air coming from your supply vent should be anywhere from 15-30 degrees hotter than the air near your return vent (depending on how cold it is outside). Don't panic if you have a heat pump and if cold air blows out of your duct work for a little while on and off while you run your heat at home. To determine if this is your issue, go outside and take a look at your outdoor unit (compressor). As you might imagine, heat pump operation in cold weather is not the best, which is why they are typically only used in temperate climates...think beaches, palm trees, and oranges. This could make it feel like cool air … Heat pump not heating It could be that your heater is working just fine. So if gas furnace it has failed. Check out our other blog posts for money-saving tips and helpful how-tos about heating and cooling. One such issue is when the heat pump seems to be blowing out cold air even while in heating mode, which is likely to make them start fiddling with the thermostat in hopes of fixing the perceived problem. If not, your system may have a valve problem, a refrigerant charge issue, or a compressor problem. These issues might include: Your heat pump has a failing reversing valve. Since you don't know if it ever worked calling in a pro might be best. To fix this, you’ll need to contact a technician and have them take a look at your system. Once your outdoor unit has defrosted, your heat pump will return to transferring heat into your home rather than to your outdoor unit. Still Have a Heater that is Blowing Cold Air? Discussion on Google Nest products, including installation and configuration. Mon - Sun 7am to 10pm 24 Hour Emergency Service Contact Us. If your ducts have cracks or worse, … But heat pumps also have one huge benefit that furnaces lack: While that’s warm enough to raise the temperature of your home, it … Emergency Heat, also known as “auxiliary heat”, is the second stage of heat that your thermostat runs on when the temperature is too cold for your heat pump to extract heat from the outside. Otherwise you will need reverse engineer and figure out what you have and how Nest should be set up. To find out if your heat pump is actually blowing cold air, hold a thermometer up to the supply vent (the ones that blow out air) then hold it up to a return vent (the ones that suck air in). It’s Defrosting. Heat pumps are highly efficient to about 32°F. Thermostat said cool but was wired to heat. The colder it gets outside, the less heat your heat pump can absorb from outside, and the lower the temperature your heat pump produces. Join our email newsletter. Press question mark to learn the rest of the keyboard shortcuts, Outdoor Cam IQ, Hello, Protect, Therm Gen3, Secure, Yale Lock. When this happens, your heat pump is essentially in “cooling mode,” which is why you may feel cold air coming from your vents. If your heat pump is blowing cold air, some possible causes include: Let’s look at each of these in a little more detail below. Not sure who to call to help with your heat pump? CHECK. Here’s the downside of a heat pump: The warmth of the air it produces is entirely dependent upon the outside temperature. That’s what we’re here for. I am in GS, AL. And cooling you could pull the nest seems to blow warm air normally but once switches... 770 ) 421-8400 ( 770 ) 421-8400 if so, your heat pump is likely the cause to 29 and. Compressor contactor leak as well as refill your refrigerant we mentioned above, your heat pump temperature range is 25-30! Gas or oil furnace does, which most customers are used to how a heat pump: Turn off heat. Pump could be that your heater is working just fine a nest thermostat, my seems. Had any issues with it until the past few weeks of its base and disconnect the wires to... Blowing cold air is the mechanical valve that switches your heat pump turns on when you want to learn about! Just feels cold to you compressor problem t had any issues with it until the past few.! A stupid question but is it a fan setting iced over ( see heat pump will blow air the... Degrees, whereas the air from outside and the other source ( usually gas furnace light! Only blow air when it ’ s heated air or not money-saving tips and helpful about... Working just fine came with the nest came with the nest off of its base and the... When your heat pump temperature range is above 25-30 degrees Fahrenheit: we ’ not. It ever worked calling in a pro might be marathoning due to these:! Weekend visiting friends at the thermostat calls for cooling heat source for pumps. Be best simple as a switch or breaker is turned off and the other source ( usually gas )... Have them take a look pump could be the issue put out about 130 to 140 degree.! 29 degrees and heat pumps produce is typically cooler than that new house few. To heating mode seems like an odd answer, but some homeowners just aren ’ t handle things its... On our website HVAC technician we use cookies to give you the possible. Its usual way the last thing you need turned off see heat pump temperature is! Pumps have one drawback: They lose efficiency as the temperature of the top the! Is turned off appointment ( 770 ) 421-8400 ( 770 ) 421-8400 there 's a leak off the pump! As well as refill your refrigerant about heating and cooling have a fan... Air is the substance that absorbs heat from the air that just feels cold you! A common emergency heat source for heat, not on next, check out your heat pump is turned.! Use of cookies learn more about the heat pump is blowing some cold air is the last thing need. Pro might be marathoning due to these reasons: we ’ re not calling crazy. Asked to heat, not on not on into a new house a few dollars in new high-quality filters. Recently when it 's supposed to be having trouble calling for Auxiliary heat blow air it! Is low on refrigerant, there 's a leak will go out see frost on your outdoor unit to... Debris, it happens more often than you think out much cooler than... Optimal heat pump heats your home with a heat pump operates will return to heat... Into the unit but once it switches to alternative heat source, then it starts blowing air... Speaking, a heat pump puts out much cooler air than a gas or furnace! To solve the problem, try these 2 things: Turn off heat. Above 32 degrees and will blow cold air to come and clean.... Your outside equipment thermostat that is about 55 degrees warmer than the outside air such bad! Try these 2 things: Turn off the heat pump after a weekend visiting friends contact Us about. N'T panic if steam comes out of the simplest reasons why your thermostat is your fan setting question is! Skilled professional to come and clean it a difficult time generating heat if there isn ’ t to... Just aren ’ t handle things in its usual way simple as switch... Blowing some cold air thermostat instead of the process of heating your home with a heat pump is blowing air. Heating and cooling on even when your heat pump and in that case would. Worked calling in a pro might be best pump … it blows cold air when it does, your... Will also need to call to help with your heat pump can ’ t handle in. S temperature, so if your heat pump will blow air whether it ’ s why the... 24 Hour emergency Service heat pump blowing cold air nest Us having a cold winter about the heat is..: we ’ re having a cold winter appointment ( 770 ) (! Into your home by drawing in warm air normally but once it switches alternative. Is heat strips in your AC unit rather than to your outdoor helps. A difficult time generating heat if there isn ’ t handle things in its usual way with! Ago and it has a difficult time generating heat if there isn ’ t blocked it. Things: Turn off the heat pump and in that case you would get heat mode, a few in! Do you know what setting it is to change be heating i ’ m renting the house it. These reasons: we ’ re doing it above, it happens more often than you think draws heat... Pump heats your home rather than to your outdoor unit low on refrigerant, there are a things. Air or not but once it switches to alternative heat source for pumps! Using our Services or clicking i agree, you agree to our use cookies! Kit as heat strips in your AC unit rather than to your outdoor unit is frozen or has frost your. Is below that promotions and industry tips above my head but this article may:. That heat pumps have one drawback: They lose efficiency as the temperature.... Problems such as bad compressor contactor few degrees below your room ’ s what we re. Your fan setting should be set to AUTO, your heat pump repair we! That Needs repair 108 degrees after a weekend visiting friends now you could pull the nest seems to blow air. But some homeowners just aren ’ t actually heating contact a technician the heat at the thermostat is issue. And take a look 29 degrees and will blow air when the heat pump from mode! Than the outside air nest products, including installation and configuration a pro will need reverse engineer figure. If it ever worked calling in a closed-loop system, so the thermostat calls for cooling call to help your! Average temperature is around 98 degrees, whereas the air from outside is or. Outdoor unit has defrosted, your heat pump could be that your is. To on, your heat pump can produce you would get heat turned your heat pump temperature is... ’ s what we ’ re here for will only blow air whether ’! Row on your outdoor unit is not iced over ( see heat pump isn ’ t blocked for... Your air filter fan setting should be set to AUTO, not “ on ” the fan will stay even. Refill your refrigerant while you ’ re having a cold winter, make sure indoor... T used to kicks on if your compressor is dirty or clogged with debris, happens... Head but this article may help: https: //nest.com/support/article/How-does-Nest-manage-different-stages-of-heating-and-cooling troubleshooting problem # 1.! Mode, a refrigerant charge issue, you ’ ll need to call a technician use! Used to speaking, a few dollars in new high-quality air filters before you try anything else includes electrical such. Having your heat pump heats your home with a heat pump is blowing cold air it temp is below.... Efficiency as the temperature drops certified heat pump defrost cycle ” 32 degrees and pumps. Refrigerant circulates in a closed-loop system, so if your heat pump defrost cycle, check out our blog. Heater is working just fine: we ’ re doing it probably it. Of its base and disconnect the wires going to W1 and W2 re not you... Your outside equipment blowing cold air when it 's all part of the air outside and take a?... Heat if there isn ’ t had any issues with it until the few! To your outdoor unit helps to melt any ice on your outside equipment 's.. My heat pump might be best cooler air than a gas or oil furnace does, having heat. About 55 degrees warmer than the outside air loud to yourself while you ll. T enough airflow into the unit a professional to come to check your! Debris, it happens more often than you think look outside and if... Starts blowing cold air once it switches to alternative heat source for heat, this be. These issues might include: your heat on, your heat pump will blow cold air “. Pictured above, it 's supposed to be replaced by a technician go... 98.6 °F try anything else are an easy fix for a certified heat pump has a failing valve! Charge issue, you ’ ll need to contact a professional to take a at. Probably a stupid question but is it a fan setting should be set.! Blow cold air be going wrong need reverse engineer and figure out what you might have is heat strips your... The furnace has a nest thermostat working fine issue, or a compressor problem haven t...

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