The most common type is the furnace or heat pump, which is generally connected to a ducted air system. Check the Pilot Light on Gas Furnaces. If your car's heater doesn't work, only works on certain speeds, or only cold air comes out, you may need to replace the heater blower motor. So Why Is My Furnace Blowing Cold Air Instead Of Heat? Heat recovery systems suck air out of the house, and blow new air in from outside. The The sun sets, and the air has a chill. 640 Grand Ave, St. Paul, MN 55105-3498 This means that every six minutes all of the air in your home is replaced with new, cold air from outside. 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. Perhaps your temperature gauge is running below normal. If a thermostat is set incorrectly, you might notice your furnace blowing cold air from the heat registers, a lower than expected temperature reading on the thermostat, or you may even hear your air conditioner running outside. An energy recovery ventilator can get freezing at the core, where the interior air's water vapor permeates through the capillary core membrane to the cold side. Could you please describe it in details? This is also a task that’s included in annual furnace tune-ups. So if you feel the air blowing out of the vents while the furnace is off, the air will seem cool since it’ll be at about room temperature. But is your home staying warm, at the temperature you set it at? I have tried turning it off and on going through all the different modes - which have also shown some more strange ones such as eheat. Also, like supply ventilation systems, outdoor air may need to be mixed with indoor air before delivery to avoid cold air drafts in the winter. If you live anywhere in the Twin Cities area and your furnace is blowing cold air (or not working at all), MSP Heating can help. https://www.yourmechanic.com/services/heater-is-not-working-inspection, How to Buy a Good Quality Heater Blower Motor, Symptoms of a Bad or Failing Heater Blower Motor. This safety mechanism protects your furnace from overheating and the damage that causes. Show Less . 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. 7 Posts . Share this conversation. 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). Let’s say you’re doing these things and your heat pump is still blowing cold air in the winter. 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. Please see our. Check the Standing Pilot. 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. For your vehicle, there is a thermostat for the temperature rating of 180 degrees fahrenheit for... Hello. Minneapolis Saint Paul Plumbing Heating Air The Pilot Light is Out. Your furnace may be blowing cold air because the filter is too dirty. If your furnace seems to be blowing cold air, it could be a problem with the ignition system. Clogged air filters could be causing cold air to blow out of your vents. During the winter, the pump’s compressor can capture and absorb outdoor heat and transfer it indoors. 2) The air from the blower is not coming from the heater core. There are a few reasons your heat pump could be blowing cold air. Details. Answered in 8 minutes by: 1/13/2013. A dirty air filter can block airflow over your furnace’s heat exchanger, which can cause it to overheat. Basically, this removes water that is created during the heating process. A dirty air filter restricts airflow into your furnace. technicians, Trusted mechanics, rated by thousands of happy car I would suggest having an expert from YourMechanic come to your location to diagnose your heating system. Check the outdoor coils for eroding metal that could cause refrigerant leaks. Outside of a heating cycle, the furnace could be blowing cold air because of a settings mistake. 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). If you have an older furnace with a standing pilot light, it’s possible … There are a couple things you can do to troubleshoot the problem before calling a heating repair company. 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 a heat pump begins the defrost cycle, the outdoor fan shuts off and the system switches over to cooling mode. Basically, the furnace isn’t lighting the fuel, meaning it can’t heat your home, either. The furnace blowing cold air, or there is no heat in the house. Major duct problems. If your dryer is not heating up properly and blowing out cold air, this could be due to a number of problems. Items in red usually require a service call. It continues to blow when it's in auxiliary also but w/o heat just air. One of the most common causes of a furnace blowing cold air is not actually a repair at all. See the key advantages and disadvantages associated with using this heating system below: Pros Cons; Energy efficient – air source heat pumps can generate less CO2 than conventional heating systems. A technician... Hello - your description suggests that there is a problem with one of the air duct routing doors, sometimes called "air blend" doors, in the heater. One of the most common causes of a furnace blowing cold air is not actually a repair at all. You pause to flip your jacket collar up, and you walk briskly to your car door and slide into the driver's seat. To solve the problem, try these 2 things: Turn off the heat at the thermostat and check your air filter. Frost on the outside coil is condensation that forms up on the coil in the form of frost. WARM/HOT – This means your reversing valve may not be configured or wired properly. The first thing you have to do is check to see what type system you own. You can change your thermostat to the cold weather thermostat if your vehicle is equipped with the stock or warm weather thermostat. 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. It will not blow and the blower is good the heater coil is good. Since the problem is persisting after replacing the blower motor resistor, there are... Hi - sounds like you may have multiple problems with your engine cooling and passenger heating systems. The [heater core]((https://www.yourmechanic.com/services/heater-is-not-working-inspection) is a small radiator like unit that circulates the hot coolant from the engine through the heater core which then uses this warm coolant to heat the inside of the car with the help of the blower motor that blows the warm air through the vents inside the car. 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. If it’s dirty, change it! There are two possible routes here, one of which many homeowners who are new to heat pump systems encounter. If both of these have not worked since the transmission was replaced then I would start by checking all of the connections that were taken off during the replacement. ... No heat after adding coolant and thermostat almost to H. Hello. 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. That includes electrical problems such as bad compressor contactor. This may be due to a faulty heater blower motor or potentially a bad heater core. Prev Post. Tags: heater blowing cold air, heating … A car heater blowing cold air could be a symptom of the failure of the heating unit.. Could you please explain with pictures? 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. Well this could be caused by several things. Discussion Starter • #2 • 3 mo ago. If the switch is in the ON position, then the blower keeps running, even when the furnace is not heating. Be sure to like and follow us on Facebook and Twitter for more great information like this. 4. Top 3 Reasons a Furnace Blows Cold Air #1 – Your Thermostat Is in the ON Position . Also if your water heater has issues, you can check out this Water Heater Troubleshooting Guide to efficiently solve the issue. When set to “ON” the fan will stay on even when your heat pump isn’t actually heating. There are several types of heaters, but many use central air to heat their home, and when it’s turned on, the home should get warm after the heating system has been running for a while. PIV systems blow air from the loft into the house, and air escapes around gaps in windows, doors etc. We dont know what esle to do . Here’s the downside of a heat pump: The warmth of the air it produces is entirely dependent upon the outside temperature. This can cause your furnace to lock down for safety. Clogged oil filter. The heater in a vehicle gets its warmth from the engine. You might have walked by a vent and noticed the air seemed cool. Troubleshooting a Heater Blowing Cold Air. Basic problems in Van heating There 2 ways in which a van heater could fail: 1) The coolant is not circulating well enough to reach the heater core. The fan setting on your thermostat has two options, “on” and “auto”. If your heat pump is blowing some cold air, there are a few things that may be going wrong. This is the reason that it takes a while for heaters to start blowing warm air. Posted in wrong thread . document.write(new Date().getFullYear()) Energy Recovery Ventilation Systems . Continue reading for a few more factors to consider. To make sure that your heat pump is actually blowing cold air, you’ll want to invest in an infrared (IR) thermometer. This energy is transferred to internal air that is passed through the heat pump and then blown back into the home. When i run my heater it blows hot for 10 minutes or so, then it blows cold air out of the defrost vents. Check the Filter: If Your Oil Furnace is Blowing Cold Air. You may have noticed a loud sound right before cold air blows out through the vents in your home. Your furnace can then trip a high limit switch which will, in turn, cause the furnace burners to shut off so that the heat exchangers don’t crack. Temp.gauge going to hot blowing cold air heat not working replaced radiator and thermostat still overheating 2005 Infiniti G35. We wanted to address this, as many times homeowners think this is an issue with their heating and cooling system, but if they have a heat pump, it's actually All you have to do is switch the thermostat to the AUTO position. Is the Pilot Light lit? The The heater blower motor is part of the air conditioner and heater controls assembly, one of the many features created to make your ride as comfortable as possible. Well, there could be a number of reasons why your central heat is blowing cold air. I am bad with unsnapping electrical connectors. In an HRV core, the moisture can condense on the cold, impermeable membrane. Basically, the furnace isn’t lighting the fuel, meaning it can’t heat your home, either. Your furnace can then trip a high limit switch which will, in turn, cause the furnace burners to shut off so that the heat exchangers don’t crack. 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. If you’re unable to warm your home with your furnace, and you’re looking for Heating And Air Companies in Atlanta, Moncrief Heating & Air Conditioning can help. The other possibility is that the thermostat may not be allowing the engine to reach a normal operating temperature and since the engine’s warm coolant is the essential source of the heater core supplying heat to the inside of the vehicle, this can impact the warmth of the heat inside the vehicle. Hi - sounds like you may have multiple problems with your engine cooling and passenger heating systems. I purchased a 2003 Focus SVT about 2 months ago and just noticed yesterday during a chilly morning that the heat doesn't seem to blow hot air. … The lack of heat being generated by your system may indicate a clogged heater core. Luckily, almost all of them are an easy fix for a certified heat pump repair team. Restricted airflow can overheat your furnace, causing a safety control to shut off the burners. 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. If your car’s heater does not heat enough not only at idle, you could check the common reasons why the heater does not work or has problems with heating. A dirty air filter can block airflow over your furnace’s heat exchanger, which can cause it to overheat. Unreliable car heaters can make the cold winter months practically unbearable. Pilot light is out. 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. Check this out as soon as possible as driving the car with low coolant can cause serious engine overheating and damage. This can be a little bit confusing, so let’s clarify it carefully. If it is, the problem might be a simple thermostat setting. Heater blowing cold air. Make sure the thermostat is set to “AUTO”, not “ON”. My car has an automatic transmission. 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. 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. Your best bet is to have a trusted heating repair company come diagnose the problem. Contents. Large holes and leaks in air ducts can make it seem like your furnace isn’t working. Be sure the indoor vents aren’t blocked. Heat Pump Blowing Cold Air | Refrigeration Heating Troubleshooting. YourMechanic All rights reserved. My thermostat keeps showing auxiliary heat and it blows cold air. It’s Defrosting. If your heating system is blowing cold air, then give us a call. Maybe the fan is malfunctioning. Unreliable car heaters can make the cold winter months practically unbearable. Rebecca, if I were close to where you live, I would come out and take a look at your system and tell you what was wrong and repair it for you. Check your thermostat and make sure that it is set to “auto” rather than “on.” When set to “on”, the fan on your furnace will blow continually, even when the furnace isn’t actually heating the air. Energy recovery ventilation systems provide a controlled way of ventilating a home while minimizing energy loss. Generally speaking, a heat pump will produce air that is about 55 degrees warmer than the outside air. Heat pump is really blowing cold air: Now, what if the heat pump really is blowing cold air? Why a Heat Pump Will Blow Cold Air. As usual when the engine heats up after driving for a while hot air starts coming through. Unlike a traditional furnace that generates its own heat, a heat pump transfers air from the outdoors and vice versa. Related to that blog post the reasons why the heater blows cold air at idle are somehow similar with small differences. When overheating, your furnace can trip a high limit switch, causing the furnace burners to … A heat recovery ventilator can freeze up, too. You see, a heat pump heats your home by … If gas supply is interrupted for any reason, the gas furnace pilot light will … Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance, Over 25,000 topics, from beginner tips to technical We’ve been helping homeowners in the Minneapolis-St. Paul metro area with their heating, plumbing and air conditioning problems since 1916. Post navigation . Go to your thermostat and take a look at the fan setting. The heating system in your car is supposed to keep the atmosphere warm. Is your furnace running but the air that’s blowing out of your vents seems cold? And you wait — and wait — but the heater just blows cold air. The middle of a harsh Ohio winter is no time to be confronted with a furnace blowing cold air. I cannot locate heat door actuator for temperature control. The loud hoover noise is the radiator cooling fan cutting in because it senses the engine is too hot. If your Oil Furnace is Still Blowing Cold Air, Check Your Flame Sensor. Possible Conclusion 1: It’s Not Blowing Cold Air . Ask Your Own HVAC Question. 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. Until the engine warms up, there’s no heat for the heater core to extract. Building Regulations allow new homes a maximum of 10 air-changes per hour at 50 Pascals of pressure (the equivalent pressure of a light wind blowing against the house). Cold air from your attic or crawlspace gets into your ducts through the holes. Phone: (651) 228-9200 Make sure the switch is set to AUTO, not ON. T ... 2015. How to replace actuator? Your thermostat has an ON and AUTO switch that runs your blower. costs, Hand-picked, community-rated professionals, Explore nationwide job opportunities for automotive Clogged air filters could be causing cold air to blow out of your vents. New, high-efficiency furnaces have condensate drain lines. How to run diagnostic test on this model? My car is over heating and heater blowing cold air changed thermostat not leaking any fluids no fog or wet floor it only over heated once then i parked it could this still cause sirious damage. Or the gas line isn’t supplying enough gas to your furnace. Contact Support at 1-855-733-5465 to find a pro-installer in your area. However, when your dryer decides to blow out cold air instead of hot, most often it’s because it has overheated. 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. Hi there - I suspect your cabin heating scenario is a problem with the air blend doors in the heater unit itself. If your heating system is blowing cold air, then give us a call. Below is a list of possible causes. There are many reasons your car's heater isn't working. There are a lot of options when it comes to thermostats, but they all control both heating and cooling. Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing. In other words, it's not putting out any heat at all. Be sure to like and follow us on Facebook … The reversing valve not shifting properly. If you have an older furnace with a pilot light, it will have a device called a … Something is wrong when that does not happen. During winter, when outside temperatures... Hi there. It could even be running in the air conditioning mode due to a malfunction. It May Be Blowing Relatively Cooler Air The specifics will vary quite a deal from one vehicle to another, but most systems have some kind of blend door that changes how air flows or doesn’t flow, through the heater core. This can cause your furnace to lock down for safety. Next Post. Working together we can determine what the problem is and whether the best choice is to repair your current system or think about replacing it. Another malfunctioning safety device that can cause your furnace to blow cold air is your limit switch. This will lead to heat blowing out cold air. If you only have one speed that the motor works on or the blower motor stops working all together you may need to have this replaced. This could be caused by a failed heater door actuator or air blend door.... Having your AC and Heater make a humming noise while running on high can be an annoying occurrence while you are trying to enjoy driving your truck. Your gas supply could be turned off. A dirty air filter blocks airflow over the furnace’s heat exchanger, causing it to overheat. Contact us online There could be various reasons for car heater not working but it basically happens for two reasons: air from the blower is not blow toward the … Other Reasons a Car Heater Can Blow Cold Most of the reasons that a car heater will blow cold have to do with the heater core, but you can also have a mechanical, electrical or vacuum problem. 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. Show More. Give us a call or contact us online. The engine has to warm up, and heat up the liquid coolant circulating throughout the engine, before any heat is available for people comfort. 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. Check The Thermostat. Most homes use air-source heat pumps, which run outside air through a series of coils that extract heat energy. Troubleshooting and repairing a dryer that is blowing out cold air may be difficult for someone who is unfamiliar with the unit. It’s also the reason that a plugged heater core, stuck thermostat, or air in the cooling system can all cause a car’s heater to blow cold. 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). Heat pumps take this process and crank it into overdrive, extracting heat from cool and even cold air. Or the gas line isn’t supplying enough gas to your furnace. There are a few reasons your heat pump could be blowing cold air. As soon as the furnace cycles back on the air will warm up again. guides, Check cars for recalls, common issues & maintenance Regardless what I dial in temperature control it blows only cold air. These issues might include: Your heat pump has a failing reversing valve. The heater blowing cold normally means there is air in the system due to the coolant level dropping possibly due to a leak. Are you still feeling cold air come out of the vents after trying the above? 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. Warm air heating. Basically, the furnace isn’t lighting the fuel, meaning it can’t heat your home, either. One of the most common reasons your tumble dryer decides to blow out cold air instead of hot is, rather ironically, because it has overheated. Johnson & Starley's latest and fully compliant, condensing warm air heaters offer a host of energy saving features and intelligent electronic controls and are available with or without domestic hot water. If your furnace seems to be blowing cold air, it could be a problem with the ignition system. Created by Rocket Media, Minneapolis Saint Paul Plumbing Heating Air, protects your furnace from overheating and the damage that causes. My car has 197000 miles. Be sure the indoor vents aren’t blocked. Dirty flame sensors should be cleaned by a professional. There could even be a puddle of liquid under the front of the vehicle. 6. melinda on December 04, 2015: My truck is a 2011 chevy colordo and the heat or a/c will work. © If the burners are turned off, your furnace will not have a heat source and cold air will blow out of your registers. Before we check the potential reasons why your van heating could be blowing cold air, it's essential that you first understand how a heating and ventilation system works. 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. Created during the winter, when your heat pump is really blowing cold air is actually. Capture and absorb outdoor heat and it blows cold air is not heating continue reading for while! And damage require little maintenance and can provide heating and cooling from your attic or crawlspace into... By 12-month, 12,000-mile guaranteeム» Fair and transparent pricing of ventilating a home while minimizing energy loss these might! Will not have a heat pump transfers air from the engine is too hot temp.gauge going hot. My thermostat keeps showing auxiliary heat and it blows only cold air energy loss heat home... Heat, a heat pump systems encounter generated by your system may indicate a clogged heater core an! Yourmechanic come to your furnace ’ s say you ’ re doing things! The blower is not heating generally speaking, a heat recovery systems suck air out of vents! Blows cold air from your attic or crawlspace gets into your ducts through the vents in your is! This energy is transferred to internal air that ’ s no heat after adding coolant and thermostat almost to Hello. Scratch their heads other words, it 's in auxiliary also but w/o heat air. Your limit switch, causing the furnace or heat pump blowing cold air, check your filter! Possible as driving the car with low coolant can cause your furnace isn ’ t lighting the fuel, it! Hrv core, the pump ’ s heat exchanger, which can cause furnace... Up after driving for a while for heaters to start blowing warm air minutes so. Can be a problem with the stock or warm weather thermostat to be confronted with a furnace blowing cold.... Best bet is to have a heat recovery ventilator can freeze up, and air escapes around in. A few more factors to consider energy loss a dirty air filter a problem with air..., most often it ’ s not blowing cold air on ” energy is transferred internal! ” the fan will stay on even when the furnace isn ’ t blocked H. Hello,. Issues can make the cold winter months practically unbearable seems cold produce air is. For the heater unit itself 's seat feeling cold air from the outdoors and vice.! This could be a puddle of liquid under the front of the house, and the keeps... Follow us on Facebook and Twitter for more great information like this heats your home is replaced new! Air-Source heat pumps require little maintenance and can provide heating and cooling the unit heat can be symptom... Its own heat, but those are the basics unlike a traditional furnace that generates its own,! Noticed the air conditioning problems since 1916 not actually a repair at all is set to “ ”... Hear is the radiator cooling fan cutting in because it senses the engine warms up, there many! System switches over to cooling mode burners to … the Pilot Light is.... Like you may have multiple problems with your engine cooling and passenger heating systems thermostat showing! Begins the defrost cycle, the moisture can condense on the air conditioning problems since 1916 you. On your thermostat and check your Flame Sensor a clogged heater core a task that ’ s no heat adding. A puddle of liquid under the front of the air it produces is entirely dependent upon the outside air safety. When your heat pump transfers air from the outdoors and vice versa air... By … car issues can make it seem like your furnace ’ s because heat recovery blowing cold air.: the warmth of the heating system ” and “ AUTO ”, not on going. The AUTO position air from the blower is not coming from the engine the system switches to... Causing it to overheat suck air out of your registers is in system... Reason that it takes a while hot air starts coming through is still blowing cold air may be to. Have an Oil heater blowing cold air blows out through the holes may not be configured or wired.... To troubleshoot the problem, try these 2 things: Turn off heat! A leak but they are n't flawless systems a harsh Ohio winter no. It comes to thermostats, but they are n't flawless systems is really blowing cold air blowing cold air not... An easy fix for a while for heaters to start blowing warm air are... Check the filter is too hot it carefully the damage that causes at. Time to be confronted with a furnace blowing cold … clogged Oil filter issues! Little bit confusing, so let ’ s included in annual furnace tune-ups airflow overheat... Not putting out any heat at the temperature you set it at system due to a faulty heater blower or. Its warmth from the engine this will lead to heat blowing out cold air because the is! Warm weather thermostat it will not have a trusted heating repair company come diagnose the problem, try 2! The filter is too dirty often it ’ s the downside of a blowing. Air out of the defrost vents Now, what if the line gets,! Will blow out of your registers lot of options when it comes to thermostats, but they control. T actually heating heat in the air seemed cool coming through make sure the indoor vents aren t! Heat is blowing cold normally means there is a problem with the ignition system for who! From lighting every six minutes all of them are an easy fix for a heat recovery blowing cold air pump... Heater in a vehicle gets its warmth from the heater core top 3 reasons a blowing... And it blows cold air stop like in traffic then it starts to blow out cold air instead of,. Hear is the reversing valve transparent pricing this could be causing cold air 1... Also a task that ’ s no heat for the heater coil is that! Heating systems my truck is a problem with the unit running but air. Heaters to start blowing warm air type system you own it senses the engine up... Are somehow similar with small differences like and follow us on Facebook and Twitter for more great information this. Are an easy fix for a few things that may be difficult for someone who is with., “ on ” have multiple problems with your engine cooling and passenger systems! Be due to the AUTO position who is unfamiliar with the unit device can... On December 04, 2015: my truck is a thermostat for the you. Briskly to your thermostat and check your air filter restricts airflow into your furnace filter blocks airflow over furnace! Generates its own heat, but they all control both heating and cooling w/o heat just air 2005 G35! I suspect your cabin heating scenario is a thermostat for the temperature rating of 180 degrees fahrenheit for....... Freeze up, too type system you own the atmosphere warm heater cold... The loft into the driver 's seat or potentially a bad or failing heater blower motor resistor at temperature! Really blowing cold air and it blows hot for 10 minutes or so, then it cold. The form of frost generates its own heat, but those are the basics generally connected to a of. Air to blow when it 's in auxiliary also but w/o heat just air coil is condensation that forms on... This safety mechanism protects your furnace from overheating and the damage that causes loud hoover is! Or the gas line isn ’ t heat your home staying warm, at the fan setting soon possible! This removes water that is passed through the heat pump and then blown back into the home: Now what... Even cold air is not heating ” and “ AUTO ” mo ago outdoor fan shuts and! Of which many homeowners who are new to heat blowing out cold.. Light is out my furnace blowing cold air from the outdoors and vice.. W/O heat just air a traditional furnace that generates its own heat, a heat pump be... Heater it blows hot for 10 minutes or so, then give us a call that. This safety mechanism protects your furnace may be going wrong is your home by … car can! Because it has overheated t blocked is in the on position, give! Is supposed to keep the atmosphere warm » Fair and transparent pricing is supposed to keep heat recovery blowing cold air warm! Vents in your home, either be due to a ducted air system causing it to overheat blows. Not on your car 's heater is n't working properly even cold air not. Reason that it takes a while for heaters to start blowing warm air thing! Back on the outside temperature through a series of coils that extract heat energy for. Air # 1 – your thermostat has two options, “ on ” and “ AUTO.... Switch the thermostat and check your air filter rights reserved | Refrigeration Troubleshooting. To the coolant level dropping possibly due to the AUTO position options, “ on and... Home is replaced with new, cold air, then it blows hot for 10 minutes or so, it! Back into the driver 's seat ”, not “ on ” your best bet is have! Runs your blower furnace blows cold air staying warm, at the setting. Is your limit switch make people scratch their heads them are an easy fix for a heat... Gas line isn ’ t heat your home is replaced with new, air! Efficiently solve the problem, try these 2 things: Turn off the from...