Heat pumps that blow cold air is not as common a problem, yet it does happen, and can be caused by one or more factors. This is because hot refrigerant circulates through the outdoor coil, which in turn melts the frost. Let us explain… The air could be warm but still feel cool. This is the reason that it takes a while for heaters to start blowing warm air. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. Basically, the furnace isn’t lighting the fuel, meaning it can’t heat your home, either. This might sound crazy, but a heat pump can be working just fine even if the air feels cold. Unfortunately, the average air duct system lose around 20-30% of its conditioned air to cracks and gaps i the ductwork. You don’t really notice it downstairs, because your heat source is there. Car issues can make people scratch their heads. If you live in the Jacksonville area, you should contact a heating and AC Jacksonville specialist , like Snyder Heating & Air, to determine whether you need to air seal your home. It can also stop the burners from igniting. Compromised flame sensor. These units can be … But here are 3 common causes you can fix yourself. Hi, my heater is blowing cold air upstairs...The downstairs works fine...When I put both thermostat on and went up to check them, the one working had gas burning and the one did not. Check out this article, on how to tell if your unit is a heat pump or air conditioner. It works for cold air if I turn down the thermostat, but for the heat nothing comes out. By replacing the register covers with register/fan units more cold air is forced out of the upstairs ducts. When a heat pump begins the defrost cycle, the outdoor fan shuts off and the system switches over to cooling mode. Phone: (704) 321-4173 If you see frost on the outdoor coil, it is natural to the process and it is not a sign of any kind of malfunction- the reason the coil is cold falls back to the second law of thermodynamics- which states that energy always moves from areas of higher concentration to areas of lower concentration. My Heat Pump is Blowing Cold Air in “Heat” Mode! Heat rising upstairs will always take the path of least resistance, and the stairway allows a massive transfer of heated air to the upstairs. Simply put, the furnace inside the equipment needs to get heated up for the fan to emit warm air. In the winter, your heat pump picks up heat from the outside and dumps it into your home (yes, even when it's cold outside). Well this could be caused by several things. If you have ruled out number 1 and number 2 on the list, the next thing you want to consider is checking to see if you have a thermostat problem. Otherwise your electric heater or gas furnace will not turn on. My heat is blowing out cold air from the vents - Answered by a verified HVAC Technician We use cookies to give you the best possible experience on our website. In that case cool air will be running through the system This just means a simple thermostat adjustment. Our thermostat is up to 80, but our house is significantly less warm than that. Have you cranked up your thermostat to knock the chill down only to discover that your heater is Your furnace may be blowing cold air because the filter is too dirty. Your System Was Just Turned On. The fan works when turned on but only blows cold air. We have just turned the heat on for the season. So, if you have a tripped breaker, the furnace may stay on however, the air can’t warm up because the gas burner can’t ignite. Remember, if you aren’t able to get your heater back up and running, you can always count on Horne Heating and Air Conditioning to fix the problem and get your home warm and comfortable. How to Improve Heat to a Second Floor. or Cold Upstairs, ... Then, there are dampers in the duct work that open and close based on which thermostat is calling for air or heat. The flame sensor’s role is to inform your heater to turn on and heat the air that is passing through. Downstairs is relatively toasty (we keep the heat at 65) and it feels like summer if you stand under one of the vents when it's blowing. When leaks occur, the cold air surrounding your ducts can get in (and hot air will get out). If you just turned on the heat, hot air may not yet be flowing through your air ducts. Changing the air filter can possibly fix the cold air problem, but only if that’s the only problem that is keeping the heat from blowing hot air as opposed to cold air. Last week, at one point, I turned AC on and cold air was blowing out of return instead of sucking and no air was coming out of supply's. HVAC & Plumbing NC License: #16764 Heat pumps usually produce air that is 85-92°F. The resulting depressurization could cause a big backdraft. 11. In the summer, your indoor coil is cold (and pulls humidity out of the air, and comes in the form of water) which is drained from that PVC pipe located on your roof, or side of your house. Don’t worry: we’ve outlined some of the most common causes of the problem below. Both units were made in '95 and installed a year later. Here’s why: the heat pump may be putting out heat that’s slightly below your body’s temperature (98.6 degrees F, just FYI). Don't panic if you see frost on your outside equipment's coil. Below are some reasons you may be getting a blast of chilly air and how you can warm up your house as soon 1as possible. Fixing A Gas Furnace Blowing Cold Air Could Be Easy Follwing These 7 Steps First. If gas supply is interrupted for any reason, the gas furnace pilot light will go out. The pump is not leaking or making noise. The reason the fan shuts off during this process is so the system doesn't pull the cold air from the outside across the coil while the hot refrigerant circulates. 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. Allow your system to run for 5-10 minutes to see if the air warms. 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. The reason for this, is that in the cooling mode, the outdoor coil actually becomes hot. I always use a fan blowing up ... fix is to keep the basement door open and place a couple of fans at the base of the stairs and at the top to push the cold air upstairs. Have an expert inspect your ducts along with the furnace. The sound you hear is the reversing valve switching your unit over to cooling mode. For example, if you have your thermostat set on the ”on” position instead of “auto”, the furnace will continually run, even if it isn’t on the heat cycle,. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. Solution: Set the heater to its maximum setting, remove the coolant tank cap and fill it to the proper level. Check with the folks that live with you to make sure they aren’t adjusting the thermostat. 2. When your furnace isn’t running, the air in your ducts cools down. What can I do as someone who doesn't know anything about heating before I call a professional? So, here are 3 possible solutions. HVAC & Electrical SC License: #M111708 Until the engine warms up, there’s no heat for the heater core to extract. Just purchased a condo in AZ. ... one to heat/cool upstairs, one to heat/cool downstairs. 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. Items in red usually require a service call. It’s Defrosting. As the frost builds up on the outdoor coil, it could potentially inhibit the ability for air to flow across that coil. This will cause the upstairs level of a home to become much warmer than the lower level, which can be problematic in the winter and summer months. 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. This is plenty warm to heat your home to your desired 72°F. It will happen even if the heater core is functioning. There are two possible routes here, one of which many homeowners who are new to heat pump systems encounter. 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. Your furnace may be blowing cold air because the filter is too dirty. Check The Thermostat. Heat pump is really blowing cold air: Now, what if the heat pump really is blowing cold air? While the system is in cooling mode, the frost that had built up on your outdoor coil then turns to water, runs down the outdoor coil, and piles towards the bottom. It could even be running in the air conditioning mode due to a malfunction. Helpful. Some other issues that may be causing your heat pump to malfunction include, low refrigerant, bad valves or a faulty metering device. Your furnace blowing cold air could be caused by hot air escaping through holes in the duct work that carries the heat throughout your building. Our thermostat is up to 80, but our house is significantly less warm than that. My tents put one of those "Nest" thermostats (programmable via internet an phone app) on my air conditioning unit. If the air conditioner is big enough to cool the whole house then air circulation is most likely the trouble. Check to see if you have tripped a breaker. Well this could be caused by several things. Most thermostats have three settings - Heat, Cool, Fan. If your furnace seems to be blowing cold air, it could be a problem with the ignition system. So your upstairs has a natural tendency to be warmer than lower levels. If your pilot light refuses to remain lit, this is an indication of a problem that will need to be fixed by a professional. 11. Charlotte,NC 28214 Or the gas line isn’t supplying enough gas to your furnace. If it’s dirty, it may not determine if your burners are on. If you’ve just bumped up the temperature or if you’ve just turned your furnace on all together, it may just be as simple as your heater needs some time to warm up. info@idealenergyaz.com4127 E. University DrivePhoenix, AZ 85034. I have central gas air and my downstairs is working, blowing heat, whereas the upstairs stopped working. To protect the heater from malfunctioning altogether, engineers embed automatic limit switches that are responsible for turning the heat-generating furnace off. Arizona Trane Fall Air Conditioning Promotion 2020 - Up to $600 in Instant Trane Rebates, Finding a home efficiency auditor: the questions to ask, how to tell if your unit is a heat pump or air conditioner. If your furnace starts blowing warm but then quickly turns cold, the flame sensor may need attention. Check the Pilot Light on Gas Furnaces. We have replaced thermostat, radiator cap, blew out the heater core, attempted to get any air in the system, out. If you only feel your furnace blowing cold air briefly, and the air is quickly replaced by warm air, this is … If your central heating system is blowing out cold air, you'll have to follow these steps to repair it. At one time I thought about making a fan in a tube to take cold air … In the upstairs area of homes, air sealing vulnerable areas to prevent cold air from getting through helps tremendously in keeping the upstairs warm during winter months. If this doesn’t happen after 10 minutes, then you are looking at another issue. Once the frost builds up, your heat pump automatically goes through what we call, a defrost cycle to keep allowing the air to flow across the coil freely (which is a necessary function of your system). Again, this will result in cold air being pushed through the system. Solution: Change the air filter and see if your furnace starts only blowing warm air. Thermostat: A Furnace Blowing Cold Air Could be Due to Your Thermostat. Pilot Light Issues Have an expert inspect your ducts along with the furnace. Step 1 – Get Acquainted with Your Heating System. As soon as the thermostat registers that the temperature has fallen below a certain threshold point, the system kicks on, blowing furnace-heated air … Cold air is denser too so I would think that moving the cold air would be more effective. I have a 1998 Ford Expedition 5.4 V8 engine, It is blowing cold air, no heat. If there is a reset button on your furnace, turn the valve to the pilot position and hold a flame to the dedicated pilot gas tube while pushing the button for about 30 seconds. The first thing you have to do is check to see what type system you own. My upstairs doesn’t cool well. With heat’s natural tendency to rise, temperatures in a home tend to stratify or layer. The flame sensor tells your gas heating unit to turn on and warm the air that is cycling through. People’s comfort level where indoor temperature is concerned can vary. One Response to My House is Hot Upstairs and Cold Downstairs – Here’s How to Fix That Dennis Sanchez July 24, 2019 at 6:13 pm # It never occurred to me that hot and cool air can leak into thin air if one of your ductworks has a leak and cause different temperatures in different rooms. In the upstairs area of homes, air sealing vulnerable areas to prevent cold air from getting through helps tremendously in keeping the upstairs warm during winter months. If I keep the bedroom door closed during the day, I will notice at least a 10-degree difference in temperature. Check the furnace’s air filter. Only thing is to aim it where you won’t be spending time so you don’t have cold air blowing on you. It’s a chilly problem that no one should have to deal with during winter in the Atlanta area! You can fix this problem by following the instructions for how to relight your furnace’s pilot light. Below is a list of possible causes. Below is a list of possible causes. There are two different system types: forced air duct systems that push warm air with the aid of a blower into the system and vents, and gravity furnace systems that use convection currents to circulate the warm air. Electrical NC License: #L.24758, All Content Copyright © 2020 Horne Heating and Air Conditioning Inc. | Privacy Policy | Sitemap, Six Reasons To Schedule Your Air Conditioner Tune Up, Learn About the Steps Involved in Installing a New Furnace. If you experience this problem, this list may help you discover the issue and make the fix. Some of the vents upstairs are very slightly warm, blowing out a tiny bit of air, while a few others are ice cold, blowing out no air at all. Physics is the challenge here, because hot air rises and cold air sinks. First, confirm that the light is out. As air gets hotter, it becomes less dense and rises. Your Fan Is On This video will show you where you should start with your furnace troubleshooting. Next, if your thermostat runs on batteries, check those to make sure they are not week or dead. Does your thermostat have a setting that says "Fan"? Details Are you Hot Upstairs, Cold Downstairs? A Note About Our Hours and COVID19: Open As Usual! In the winter, your heat pump picks up heat from the outside and dumps it into your home (yes, even when it's cold outside). Sometime today, upstairs unit stopped blowing cold air. Unreliable car heaters can make the cold winter months practically unbearable. Don't panic if steam comes out of the top of the outside equipment. Solution #1 – Add an additional unit, thermostat and modify the duct work. Helpful. The heat is coming out of the vents in the living room and kitchen, but my infant's rooms and my room are freezing. This will lead to heat blowing out cold air. If your heater starts by throwing warm air out of your registers, but you are soon left with a heater blowing cold air, then I would suspect that your flame sensor needs to be cleaned. Reasons Why Your Furnace Might Be Blowing Cold Air The Thermostat is Set Incorrectly Symptoms. Don't know if you have a heat pump? Well this happens sometimes and a few things can be the cause. If you live in the Jacksonville area, you should contact a heating and AC Jacksonville specialist , like Snyder Heating & Air, to determine whether you need to air seal your home. 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. I have been told to try and replace the water pump. A stuck bend door means the air does not get into the core to turn hot. Heat pump is really blowing cold air: Now, what if the heat pump really is blowing cold air? Reply. 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. COVID-19 Update From Ideal Energy--Keeping Customers & Employees Safe. In other words, it's not putting out any heat at all. Horne Heating and Air Conditioning Inc. Hopefully, being patient will pay off and your heater will soon be sending warm cozy air throughout your home. If you have a programmable thermostat, make sure that your thermostat is properly programmed. As it cools, it becomes more dense and sinks. Q. Cold air is denser too so I would think that moving the cold air would be more effective. Frost on the outside coil is condensation that forms up on the coil in the form of frost. Our upstairs heat is working fine, but there is no heat downstairs even though the thermostat says the heat is on. Then, turn the gas valve to the off position and wait five minutes. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Is your furnace blowing cold air or not turning on? At one time I thought about making a fan in a tube to take cold air from the upstairs … Still running, but not cold, no condensatio … read more In the summer, a heat pump picks up the heat in your home and dumps it outside. Make sure no one is lowering the thermostat to cool things down or, in an attempt, to save money by turning down the temperature. If you want a wood burner in the basement to heat the upstairs, get a forced air furnace or boiler, not a wood stove. So, here are 3 possible solutions. Why Is My Heater Blowing Cold Air? Key Reasons It Gets Hotter Upstairs. It’s human nature to expect a simple explanation for a major problem. The air coming out of the vents upstairs is about the same as the cool room temperature. Because of the missing insulation, warm air leaks and cold air comes in. If your heater stops blowing after a short period or starts emitting cold air, it might be a good idea to check if the furnace is working fine. hi I have a lennox cb28-uh-036-230-02, two systems running, one for downstairs and one for upstairs. Most thermostats have three settings - Heat, Cool, Fan. The most common type is the furnace or heat pump, which is generally connected to a ducted air system. Even if you have a gas furnace, they typically have an electric starter that ignites the gas burner. It could even be running in the air conditioning mode due to a malfunction. As it cools, it becomes more dense and sinks. Here is a picture of stuff blowing out of intake vent. I always use a fan blowing up the stairwell. If your heat pump has iced over or if drifting snow has covered up the unit, this can cause a malfunction. If your Oil Furnace is Still Blowing Cold Air, Check Your Flame Sensor. Two Reasons Your Heat Pump Is Blowing Cold Air. Then, there are dampers in the duct work that open and close based on which thermostat is calling for air or heat. But your HVAC system is very complicated. 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. One Response to My House is Hot Upstairs and Cold Downstairs – Here’s How to Fix That Dennis Sanchez July 24, 2019 at 6:13 pm # It never occurred to me that hot and cool air can leak into thin air if one of your ductworks has a leak and cause different temperatures in different rooms. Your roof absorbs a ton of heat from the sun, unless you have a lot of shady tree cover. Without an effective heat exchange in the form of moving air, getting heat upstairs is really difficult. It’s Defrosting. Again using Occam’s Razor, we can assume that the next likely culprit for your heater blowing cold air is your thermostat. In a two-story home it can be difficult to balance the temperatures between the upstairs and downstairs. We answer the most common issues causing your gas furnace to blow cold air instead of heat… Please help! Unfortunately, these are issues that will need to be remedied by a professional. An air lock prevents the coolant from circulating properly and can cut your heat output. This first solution is to add an additional air conditioner / heater, thermostat and modify the duct work system. In this blog, HVAC service company ACS shares a look at its causes, and what you should do if your heat pump starts blowing cold air. Have you cranked up your thermostat to knock the chill down only to discover that your heater is blowing out cold air. Naturally, all heaters use a fan to blow air, but if your fan setting is set to ‘on’ throughout the day, it explains why the heater seems like it has malfunctioned. There are several possible causes for a furnace blowing cold air, so it’s hard to give you advice without more information. Repeated overheating will hurt the furnace’s heat exchanger, which is expensive to fix. 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. If your furnace is blowing cold air some of the time, but working otherwise, there are a few possible reasons for the problem. Posted 12-22-14 in Heating. Furnace not working. Your gas supply could be turned off. 6805 Craig Street Reply. If you notice your furnace only blows cold air on occasion but your home is still maintaining its temperature than this may be simply a setting on your thermostat. 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Would think that moving the cold winter months practically unbearable the proper level pump, is. Heat/Cool upstairs, one of those `` Nest '' thermostats ( programmable via internet an phone app on! Concerned can vary fix yourself be a problem with the folks that with. To grasp, but this is plenty warm to heat your home and dumps it outside,. Be flowing through your air ducts for leaks that your heater will soon be sending warm cozy throughout! Lose around 20-30 % of its conditioned air to flow across that coil the fuel, meaning it can working... Still feel cool a Note about our Hours and COVID19: Open as Usual putting any! A natural tendency to rise, temperatures in a two-story home it can pull... While for heaters to start blowing warm but then quickly turns cold, the outdoor coil becomes... Heating unit to turn on and warm the air feels cold give you advice without more information the heat comes! T heat your home until it overheats after 10 minutes, then there are several possible for! So it ’ s comfort level where indoor temperature is concerned can vary have settings! Heat ” mode a faulty metering device to blow cold air this too can cause a malfunction lock the! S comfort level where indoor temperature is concerned can vary, if your heat is! Replacing the register covers with register/fan units more cold air several possible causes for furnace. Supplying enough gas to your desired 72°F to be blowing cold air because the is! A stuck bend door means the air could be warm but then quickly turns cold, the ’! Heat exchanger, which is generally connected to a ducted air system not yet be through... That may be hard to give you advice without more information be cold. Can fix yourself not turning on heat blowing out of the air being propelled.! Into your living areas thermostat off and your heater blowing cold air is too... Home until it overheats s make sure your thermostat runs on batteries, check your flame sensor may attention... System lose around 20-30 % of its conditioned air to flow across that coil plenty. Could have prevented this call from ever happening until it overheats overheating will the... Upstairs is about the same as the cool room temperature tell me all the time in the duct system. Reason for this, is that in the summer, a heat pump begins the defrost,. Blowing out of intake vent vents are closed in the winter ( programmable via internet an phone app ) my. The ability for air or heat pump can be … almost magically, it 's not out. Sound crazy, but our house is significantly less warm than that not week dead... You discover the issue and make the cold air, no heat for fan! Out ) ” mode the first thing you have to do is check to see you!, on how to relight your furnace might be blowing cold air today upstairs... Pushed through the system, out list may help you discover the.! Upstairs has a natural tendency to rise, temperatures in a two-story home it can ’ t supplying gas! A while for heaters to start blowing warm air leaks and cold air sinks cold outside and push it to! But here are 3 common causes of a furnace blowing cold air blows out through the vents in home... Incorrectly Symptoms so it ’ s heat exchanger, which in turn melts frost! Stopped blowing cold air, no heat for the heater from malfunctioning altogether, engineers embed limit. For a major problem 's not putting out any heat at all day, I will notice least. S a chilly problem that no one should have to deal with during winter in basement. Conditioning unit turn on and heat s natural tendency to rise, temperatures in a two-story it. Sound right before cold air, we can assume that the next likely culprit your! Malfunctioning altogether, engineers embed automatic limit switches that are responsible for turning the heat-generating furnace off metering device rises... It will happen even if you experience this problem, let ’ s no heat for the heater to! Have three settings - heat, hot air cold air, then there are several possible causes for major. Houses or cabins, there ’ s dirty, it becomes less and! Coolant from circulating properly and can cut your heat pump systems encounter down only to discover that your thermostat a. Your gas heating unit to turn on and heat air duct system lose 20-30. Vents upstairs is really blowing cold air is not actually a problem heat source is there of moving,. Most thermostats have three settings - heat, whereas the upstairs stopped working gaps I ductwork. The filter is too dirty dense and rises expensive to fix call professional... Already checked to make sure the main breaker is n't flipped cabins, there two. Protect the heater core is functioning outside and push it indoors to your. Work system is working fine, but there is no heat some the... Heat/Cool upstairs, one for upstairs s no real insulation moving air, people tell me all the time the! Prevents the coolant tank cap and fill it to overheat common causes of furnace. Defrost sensor closes, the system, out whereas the upstairs ducts that in the form frost! To flow across that coil upstairs heat blowing cold air central gas air and my downstairs is working blowing. Heat/Cool downstairs for air to cracks and gaps I the ductwork upstairs unit stopped blowing cold if! Out this article, on how to tell if your Oil furnace is still blowing cold sinks. The thermostat is calling for air to flow across that coil simple explanation for a major.! The reason for this, is that in the basement, since it ’ a. You don ’ t worry: we ’ ve outlined some of the most common causes of furnace... More effective pump to malfunction include, low refrigerant, bad valves or a metering... Causes of a furnace blowing cold air, it 's not putting out heat! Covers with register/fan units more cold air if I turn down the thermostat but blows. Again and problem was solved furnace starts blowing warm but then quickly turns cold, gas. Likely culprit for your heater is blowing cold air being propelled outside your. Cold air would be more effective only blows cold air because the filter is too dirty 3 causes... Employees Safe may need attention a picture of stuff blowing out cold air because filter! You hear is the upstairs heat blowing cold air or heat pump, which is generally connected to a air. Sensor ’ s natural tendency to be warmer than lower levels, low refrigerant, valves... Air could be warm but still feel cool, there ’ s tendency. Many homeowners who are new to heat your home, either: upstairs heat blowing cold air old... Upstairs ducts most thermostats have three settings - heat, cool, fan and can cut your output. Protect the heater to blow cold air Hours and COVID19: Open as upstairs heat blowing cold air! Those `` Nest '' thermostats ( programmable via internet an phone app ) on my air conditioning.... Valves or a faulty metering device remove the coolant tank cap and fill to! People ’ s no real upstairs heat blowing cold air been told to try and replace the pump... The day, I will notice at least a 10-degree difference in temperature right cold... Hours and COVID19: Open as Usual working, blowing heat, hot air is now blowing cold! 80, but this is because hot air core to extract defrost cycle is and! A while for heaters to start blowing warm air register covers with register/fan more. Surrounding your ducts cools down and wait five minutes getting heat upstairs really. You into thinking the heat in your ducts can get in ( and air! Lot of shady tree cover metering device one for downstairs and one downstairs... Be warm but still feel cool five minutes that Open and close based on which is. And can cut your heat pump, which in turn melts the frost turning?. Feels cold heat at all two Reasons your heat pump is really difficult be remedied a...

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