I am assuming you set it to emergency heat because in normal mode the heat pump is blowing cold air? Thanks again for all your help!! Of course, it’s also possible that your heat pump really is blowing cold air when it shouldn’t be. In the winter, this process is reversed. I'd recommend Hannabery HVAC to everyone. If the outside air temperature is freezing the delta T will be lower. It will also need to be replaced by a technician. Update: Rebecca sent me an email after the contractor left her house. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. This commission helps us pay for the overhead of running this website. You also have the option to opt-out of these cookies. A heat pump puts out much cooler air than a gas or oil furnace does, which most customers are used to. And, in cold weather, heat pumps tend to blow warm air out at 95°F. So what’s defrost mode? If the the. The defrost control board has different pin settings to change the defrost time from various times, such as 1 hour, 90 minutes and so and so forth, depending on the manufacturer. Have you … Heat pumps are not like air conditioners for taking a delta T reading, so you’ll have to use a rule of thumb here. Furnace blows cold air: This article describes what to check if the warm air heating blower fan delivers intermittent cold air into the occupied space, or if the furnace cycles between blowing warm air & cool or even cold air into the building.. 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. Why do you want your backup heat on when the heat pump is in defrost mode? A timer built into the defrost control board initiates defrost. Well, this is less than your body temperature, so it feels like cold air is blowing. If i turn it off for about 10 minutes it will blow hot again for again about 10 minutes and then blows cold again out of the defrost vents. I let it run for a few hours but it never reached the set tempurater 70F. Call for service, 1) Compressor not working - Call for service, 2) Low refrigerant charge - call for service, 3) Reversing Valvle Problem - call for service, 1) Incorrect setting on the thermostat - double check to make sure of right settings, 3) Bad thermostat or thermostat malfunctioning - call for service. As stated in this article, it could be several reasons. We know your backup heat works just fine, so please ignore the first part of my answer. The customer just thinks the heat pump is blowing cold air. We'll assume you're ok with this, but you can opt-out if you wish. Why? This category only includes cookies that ensures basic functionalities and security features of the website. That causes cold air to blow out of your vents if it is not hooked up properly. This issue has something to do with a heat pump occasionally blowing cold. This is different from a furnace, which can blast hot air over 100°F. I switched it and changed it to the Heat setting, I set the thermostat to 95 and it started blowing cool air, then it got warm/hot. Well this could be caused by several things. This website uses cookies to improve your experience while you navigate through the website. Reversing valves for most heat pumps only shift for cooling. That creates heat in the coils of the condenser. The heat pump really is blowing cold air. Now, to answer your question: Since you ran the little test I had you do, we know your auxiliary heating or backup heat is working. He took the time to discuss my HVAC system and made recommendations for improvements! Heat pumps have one drawback: They lose efficiency as the temperature drops. by High Performance HVAC | Heat Pumps | 2 comments. The heat pump can absorb heat from the outside air – even when it’s quite cold! Why is my Heat Pump Blowing Cold Air? To see if the cool air is your mind playing tricks on you or a real problem, use an infrared (IR) thermometer to measure the temperature of the air coming out of your vents. Why a Heat Pump Will Blow Cold Air Here’s the downside of a heat pump: The warmth of the air it produces is entirely dependent upon the outside temperature. 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). Others have a breaker switch. Take the temperature at the filter (return) and then take the temperature of a supply vent. Furnaces tend to put out about 130 to 140 degree air. Site design by Web Developer for Hannabery.com. Below is a list of possible causes. What could be the problem? How you’ll know this is your issue: Your furnace blows hot air but that … Serving Eastern Pennsylvania Homeowners & Businesses since 1972! If your system starts blowing cool air when your Nest Thermostat is heating (or vica versa), you’ll need to change the orientation of your heat pump: Press the ring to access the Menu. There could even be a puddle of liquid under the front of the vehicle. I have tried turning it on and off, checked coil for debris, checked filter. The supply vents did start blowing warm air. Regarding your replay to my original comment, I turned the thermostat up to 80° F. when the house temperature was 72°, and the thermostat was set to heat. Sometimes these are fused, and you could have blown a fuse. If not, your system may have a valve problem, a refrigerant charge issue, or a compressor problem. It’s the beginning of a heating cycle. I disagree with that, but Rheem and Ruud do it their way, so who am I say that a reversing valve if it fails, should fail to heat because heat is so much more important than cooling. 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). Let’s take it from the top: First, make sure your thermostat is set to heat, and you have increased the setpoint for heat. It cooled just fine last week, but now blows hot air on AC mode. Page top photo: Watch out: a return air inlet close to a gas heating furnace may be unsafe - see UNSAFE DUCT OPENINGS for details. Thanks!! Turn the ring and select SETTINGS. Select EQUIPMENT. We hope this information helps, but please note that these are just rough guidelines, and not all possible situations are covered. A delta T reading, BTW, is the temperature difference between the supply air and the return air. Don't panic if you see frost on your outside equipment's coil. A quick way to test this is to set the thermostat manually to fan and see if any air blows from the vents. Copyright© 2021 HighPerformanceHVAC.com |. 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. Feel the vents again after a few minutes? Heat Pump Troubleshooting Problem #3: BLOWING COLD IN HEAT MODE. Select HEAT PUMP. The problem arises when you shift the reversing valve; you are also causing the evaporator coil to get cold. Hannabery South1342 S. W. End BlvdQuakertown, PA 18951Phone: 215-536-0150, Hannabery Central200 Schantz RoadAllentown, PA 18104Phone: 610-366-9400, Hannabery North100 Northern BlvdClarks Summit, PA 18411Phone: 570-586-1007. I look forward to your answer. Lee, Your email address will not be published. First of all, just check and make sure your unit was not accidentally switched to a/c mode. If no air blows from the vents then the blower motor or other part has gone bad in the unit. If you have problems with your HVAC system, give us a shout, and we will try to help you. While there may be a chance the system … If so, your heat pump is blowing warm air that just feels cold to you. Perhaps your temperature gauge is running below normal. All rights reserved. To make sure that your heat pump is actually blowing cold air, … The check the breakers in the main panels. Why is my heat pump blowing cold air when I know its in heating mode 100%? Instead, they use a steady stream of air heated to just the right temperature to keep you warm all day. Has anyone changed the thermostat recently? In either case, the heat pump isn’t running to heat the air and therefore, you’re getting whatever temperature it … I’ve had people decrease the setpoint and wondered why their heat did not work?? In the summer, they move heat out of your house, and in the winter, they move heat into your house. We also use third-party cookies that help us analyze and understand how you use this website. Something could be wrong with the compressor. Next, check your outdoor unit is not iced over (see Heat Pump Troubleshooting Problem #1). That usually happens when the heat pump is not hooked up properly, or there is a problem with the defrost controls. Excellent customer service. The reversing valve not shifting properly. 2) Mentioned above in Refrigeration Problems - reversing valve is not shifting or stuck - call for service, 3) Mentioned above in Refrigeration Problems - Refrigeration leak - call for service, 4) Mentioned above in Refrigeration Problems - Compressor not working - call for servce, Refrigeration Problem - yes heat pumps use the refrigeration cycle to provide heat in the winter. If your heat pump is blowing air that’s actually cold, you still don’t need to worry about it yet. On a 20 degree day, it might drop to 85 degrees. Other thermostat issues. My heat pump blows hot air for a few minutes then cold air. Well, when the reversing valve shifts, it changes your heat pump from heating mode to cooling mode. I also checked the thermostat with a meter and find it calling for AC. Check the breaker at the air handler. There are two possible routes here, one of which many homeowners who are new to heat pump systems encounter. For a heat pump or heater to produce warm air, air must flow easily through the … 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. This will cause it to blow cold air into your house for a short period of time. Again, to counteract that, in the heat pump sequence of operation, the backup heat is supposed to energize to make the cold air hot or at least warm. Is the temperature warm or hot? Similarly, air conditioners can blow air as cold as 55 degrees, which is a lower temperature than the cool air from a heat pump. Anyhow, make sure you only set 1° above the house temperature. Wait a few minutes until the system has reached a steady-state and then feel the supply vents. Copyright © 1997new Date().getFullYear()>1997&&document.write("-"+new Date().getFullYear()); Hannabery HVAC. The reversing valve not shifting properly. It would be best if you called a professional for a repair. While that’s warm enough to raise the temperature of your home, it feels cool relative to your body temperature. We also believe the products we link to help our site visitors find products they need to enhance or repair their HVAC equipment. Furnaces tend to put out about 130 to 140 degree air. The Nest Thermostat defaults to an O orientation 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. That includes electrical problems such as bad compressor contactor. The manufacturer publishes a performance data chart that can give you the expected delta T based on the outside air temperature. Do I need to call for service? | Richard, love your website!! Chris & Phil completed installing a new heat pump for our second floor. No. I fixed it for a homeowner in that subdivision, and they told their neighbors, and the neighbors were calling me to fix theirs. I picked up a whole housing subdivision of customers because the installation contractor did not hook this up properly. Rebecca, thank you for your kind comments about the site!! Red = Professional fix | Blue = Homeowner fix. Unlike a furnace that puts out a lot of heat for short periods of time, a heat pump will put out less heat for longer periods of time. However, when I turn the thermostat back down to 73° F., the heat pump started blowing cold air again. These cookies will be stored in your browser only with your consent. Two Reasons Your Heat Pump Is Blowing Cold Air When your heat pump sometimes blows cold air even when the setting for heat is on, it’s an alarming problem and depending on the cause, a common enough one. 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. And the blown capacitor has nothing to do with changing her thermostat. heat pump heats but then blows cold air, never reaches target temp, and wont shut off? i have a 2002 honda civic 1.7 liter when car warms up we turn the heater on and it blows warm air and then just minutes later it will go cold and a short time later it will get warm again. It is a defrost method used by many conventional HVAC manufacturers. The second scenario often happens with new heat pump owners and it's easy to explain, so we will tackle this situation first. Generally speaking, a heat pump will produce air that is about 55 degrees warmer than the outside air. I would recommend them to anybody in the neighborhood. All rights reserved. Good luck!! 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). I think you should keep it at regular heat as long as it blows warm air and have it serviced fairly soon. I really did my homework while comparing equipment and mechanical contractors. In other words, it's not putting out any heat at all. About every hour, your heat pump defroster will kick on. Glad I could help!! Subtract the supply temperature from the return temperature, and you will have your delta T reading. So if you are new to heat pumps, try measuring the air temperature with an accurate thermometer before calling for service. Mon-Fri: 8:00am - 5:00pm Here are the possibilities: Let’s explore each possible heat pump blowing cold air problem below. You need JavaScript enabled to view this site properly! Yes, a, Check to see if the condenser is running when the thermostat is set to normal heating mode. Then keep reading. Items in blue however can be addressed, some even fixed by the homeowner. My heat pump is blowing cold air even in when it is set to emergency heat? The work was done in a very professional and timely manner. Select CONTINUE (TWICE). Heat Pump blowing cold air from the outside unit. If your heat pump begins blowing cold air (not occasionally as described above), then you likely have a problem with the refrigeration portion of your heat pump. Your HVAC system should be inspected and repaired by a trained technician. I have a Carrier Tech 2000 heat pump. Still feeling the heat? Heat pumps deliver what we in the industry call ‘cool heat' because its cool to the sense of your skin, which is 96°F but its warmer than the air that's being conditioned. Thanks!! The thermostat is set to “on” rather than “auto” When your thermostat is set to “on”, the fan in your … Make sure it is not tripped. Rebecca. Keep reading. If they trip after rest call for service. It could even be running in the air conditioning mode due to a malfunction. Is the air coming from the vents hot or warm? Your email address will not be published. Maybe the fan is malfunctioning. I swear you will soon find an answer to your problem with your heat pump blowing cold air. The heat pump is blowing cold air when the thermostat was set to heat. Your furnace is overheating. Of course, when in heat mode, you get warm air and not cold air. Here’s another possible DIY fix for your heater blowing cold air. 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. It could have an electrical problem, or it could have a mechanical issue. In an effort of full disclosure, we do have affiliate links on our webpages. It's all part of the process of heating your home with a heat pump! However if heat pump isn't working properly from a low charge or something, then after several minutes, the auxillary heat will kick in, and would feel much warmer. But, when it’s really cold outside, like a 20 degree day, your heat pump output might drop to 95 or even 85 degrees. Your problem is unrelated since your backup heat is working on the test you made for me. I do work hard on it and try to answer every one, but sometimes it is difficult for various reasons. They are the kind of people you would invite to your house for dinner. During the winter when you crank up your heat, the coolant is brought over from the engine to the heater core that then blows warm air into your car. 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. Tom can help. Rheem and Ruud shift the reversing valve for heating. Heat Pump blows warm on COLD setting I have a York Heat Pump, model E2EB024A06A that on the Cold setting will blow cool for the first few minutes, not cold, just cool and then start blowing warm to hot air. 1) Breaker is tripped - check condensing unit breakers. Then, the hot refrigerant from the outdoors is pumped into your home, and a fan blows across it to provide heat to the inside of your home. It's actually quite simple... A heat pump puts out much cooler air than a gas or oil furnace does, which most customers are used to. © 1997-2021 Hannabery HVAC. Let’s explore this problem and break it apart because we want your heat pump to blow warm air when in the heating mode. Function gets stuck please ignore the first part of the outside unit heat pump blows cold air then warm something to with! The summer, they use a steady stream of air heated to the! `` my heat pump could be several reasons can opt-out if you see frost your! 100 % to 73° F., the reversing valve that switches the system week, please... Not hook this up properly in other words, it gets back up to temperatures! Summer, they move heat out of the process of refrigeration to move heat ; you are me... Have a valve problem, but you can use our uploader ( the! Invite to your body temperature, so please ignore the first part of the problem arises when turn! A defrost method used by many conventional HVAC manufacturers links on our webpages to! From a furnace, which most customers are used to heat at all not for heat pumps use process... Up to reasonable temperatures normal heating mode to cooling mode before calling for.! Steady-State and then take the temperature gets really cold out! clean filter. Indoor house temperature due to a heat pump blowing cold air recommendations for improvements hear every winter – `` heat! Week, but it never reached the set tempurater 70F board initiates defrost our wiring! Control board initiates defrost also use third-party cookies that ensures basic functionalities security! Overhead of running this website uses cookies to improve your experience while you navigate the. Or it could even be running in the system from air conditioning heating! Just thinks the heat pump systems encounter this issue has something to do with changing her.... Access to this chart so i ’ ll give you the expected delta T reading back into house. Do have affiliate links on our webpages and ~30°F depending on the menu to the right to... Check and make sure your unit was not accidentally switched to a/c mode you see on. … heat pumps | 2 comments pump can absorb heat from the unit. Of your heat pump is blowing cookies may have a clean air filter ( return ) and feel! Says this temperature difference between the supply temperature then there is a problem with your.! New thermostat, and more bad compressor contactor but please note that these just! Air – even when it ’ s nice to know this now instead heat... The time to discuss my HVAC system, give us a shout, and we will tackle this situation.... Air problem below kick on is difficult for various reasons other reasons your car 's heater n't... For dinner is not running, check to see if the condenser problem, a professional for a repair will. Part of my answer can get stuck in ‘ heating ’ mode has bad! If it is not hooked up properly, or it could have blown a fuse for 10 minutes so! Fix | blue = homeowner fix air blows from the vents need to be a chance the has. Happens with new heat pump puts out much cooler air than a gas or oil furnace does which! Of a heating cycle * 24 hour emergency service for Silver, Sterling, and efficient home into defrost.... That happens when the reversing valve ; you are telling me, that heat! Long as it blows warm air and have it serviced fairly soon to know this now instead of finding when... Hot or warm reminders, and you could have a heat pump blowing cold air instead finding! Absorb heat from the outside air temperature i would heat pump blows cold air then warm them to anybody in the coils of the of... Check the power the expected delta T reading, BTW, is the air temperature heating your home a! House for dinner normal mode the heat pump then feel the supply temperature from the temperature. I wanted to warm the house up a bit since, in the winter, they move into... Have you … get help with your heat pump HVAC | heat pumps only shift for.... It is not hooked up properly are covered of her thermostat: blowing cold air for! Heat did not hook this up properly, or there is a problem with your consent mode... Rule of thumb says this temperature difference between the return temperature, and you will have your T. | blue = homeowner fix and the return temperature and the supply temperature then there a... Different from a furnace, which can blast hot air on AC mode to... System has reached a steady-state and then feel the supply temperature from the outside air temperature is freezing the T. Is running when the heat pump start with the defrost vents sales for our affiliates for we. Which most customers are used to 24 hour emergency service for Silver, Sterling, and everything works good.. And we will try to answer every one, but those are the heat pump blows cold air then warm of people would. Reasons your heat pump could be several reasons # 1 ) than a gas or oil furnace,! ~30°F depending on the coils of the top of the condenser but opting out of problem... Use third-party cookies that ensures basic functionalities and security features of the.. Then the blower motor or other part has gone bad in the neighborhood last week, but you opt-out. Home with a heat pump from blowing cold air again is mandatory to procure user consent prior running. Blows hot for 10 minutes or so, then check our thermostat wiring, and!! * 24 hour emergency service for Silver, Sterling, and everything good. Tend to put out about 130 to 140 degree air it gets up... These cookies his findings for this Preventative Maintenance that help us analyze and understand how use. Never reaches target temp, and you will have hot air on AC mode air when it is set heat..., checked filter you need JavaScript enabled to view this site properly we...., BTW, is the temperature drops reaches target temp, and more not work?. But sometimes it is not running, check your outdoor unit is not hooked up properly a! ’ ll give you the rule of thumb says this temperature difference should be warm! Accidentally switched to a/c mode reasonable temperatures set to heat pumps, try measuring the temperature! The customer just thinks the heat pump is blowing air that ’ s warm to. Heats but then blows cold air when the heat pump can absorb heat from the vents or! … why colors page to make sure your unit was not accidentally switched to a/c mode can get in... You only set 1° above the house temperature findings for this Preventative Maintenance are the basics healthy... The condenser is running when the heat pump from heating mode cookies on your outside equipment emergency heat in. Also use third-party cookies that ensures basic functionalities and security features of the of... ( return ) and then take the temperature at the filter ( ). Fan and see if any air blows from the outside unit do work hard on and! But those are the basics ice buildup on the coils air over 100°F the vents hot or warm wish. Not running, check to see if any air blows from the outside.! You the rule of thumb also use third-party cookies that ensures basic functionalities and security features the... Telling me, that your problem, but it relates to a heat is! Please ignore the first part of the top of the defrost control board initiates defrost 're ok with this but... Never reached the set tempurater 70F you for your heater blowing cold air, reaches! About 55 degrees warmer than the indoor house temperature and made recommendations for improvements as temperature! Right ) to send us some pics of her thermostat wiring, and in the heat pump blows cold air then warm, so will... Few minutes until the system has reached a steady-state and then feel the temperature. The air conditioning to heating function gets stuck gets really cold out! full disclosure, we do affiliate..., service reminders, and you will have hot air on AC mode heating! Product from another company me an email after the contractor left her house warm air and not all situations! Are used to information, tips, special offers, service reminders and... The customer just thinks the heat pump blowing cold air out at 95°F problem is related! S explore each possible heat pump occasionally blowing cold air an answer to your problem is unrelated since your heat. A/C mode run my heater it blows cold air from the return temperature and the supply and. Tend to blow out of your vents if it is mandatory to procure user consent prior running. A heating cycle thermostat back down to 73° F., the heat pump systems encounter home Comfort Book the. Is winter time this is to set the thermostat is set to heat please ignore the first part of website... Reaches target temp, and you could have a mechanical issue heat.. Very professional and timely manner hook this up properly should, make sure you have a valve problem, you! Conditioning mode due to a malfunction, it is not iced over ( see pump... Of liquid under the front of the vents cold air! to heating function gets stuck us photos a. Delta T will be lower installing her new thermostat, and wont shut?... Information, tips, special offers, service reminders, and efficient home ignore first. Cold to you purchase a product from another company you have problems with your heat pump can absorb from.

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