why is my heat blowing cold air in my car

If you see steam coming out of your outdoor coil that is a normal operating procedure for a heat pump system, so don't be alarmed. One of the most popular problems car heaters experience is when the thermostat is not working as it should. This system also can circulate some of that heated coolant through the heater core in the dashboard, sending warm air into the car once you turn on the heater. With the car COLD.. check the coolant reservoir. The Automatic Temperature Control System, is a computerized management system, that is designed to keep the cabin at a selected temperature or even split the settings for the driver and passenger compartments. Get shopping advice from experts, friends and the community! Why is my car heater blowing cold air? Reasons why car heater blows out cold air; What is wrong with my car heater? Replace? Coolant level is good. Despite its chilly name, coolant actually works hard to heat up your vehicle during colder months. Car Heater Blowing Cold Due to Cooling System Issue 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. The fix is that you’ll need to have the air bubbles flushed out. Low coolant level. Why is the Heater Blowing Cold Air Instead of Hot? Bottom line: 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. The heat that comes through the vents is generated by the coolant being passed through a heater matrix (it's like a miniature radiator) behind the dashboard. It could be that your heater is working just fine. I put the heat on and about after driving a couple of miles with the heat on it would randomly blow out cold air. Luckily enough, this is an easy fix. Here’s the downside of a heat pump: The warmth of the air it produces is entirely dependent upon the outside temperature. There are a few reasons why a car heater may be on the fritz—it depends on the nature of the problem. 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. Here are a few things that you can check yourself that are likely the issue. If the heater is working fine, both these hoses will be hot to the touch. car heater does not work, blowing cold air. The radiator, thermostat, belts, water pump and hoses are responsible for circulating water to the engine to keep it from overheating. This heater core then passes the hot air it generates into the vehicle with a blower fan. If your car has no heat, not only would the inside of your car feel like an ice box, but a broken heater can prevent your defroster from blowing warm air to your windshield to eliminate ice and fog, which can pose a hazard while driving. There are a few different factors that could be causing the confusion with the airflow. The vent that directs hot air into your cabin could be blocked, preventing the air from making it to your interior. Two weeks later the car was overheating and the heater was blowing cold air when I was on the highway. The cooling system circulates a coolant through the engine that absorbs heat. Visit your dealership’s maintenance center and they can either fix or replace these controls for you. Is the heater blowing cold air into the car, or is the car heater not blowing any air at all? if it was low on charge then as you slow down, condensor temps and line prressures would raise therefore it would cool at low speed and and not when moving since the incoming air would drop system temp,reducing line pressure and then cusing compressor to cycle. 2) Thermostat that is stuck open. Some of the common problems we see when a vehicle heater does not blow warm air are: 1) Low coolant level on a vehicle due to a coolant leak. Break open the heater box and clean it out completely. Something is wrong when that does not happen. A c ar heater blowing cold air could be a symptom of the failure of the heating … However, this is a relatively easy repair that the certified technicians at your dealership can quickly make. Simply put, the furnace inside the equipment needs to get heated up for the fan to emit warm air. The heater core is like a mini radiator that is installed generally in the dash or near the firewall of the vehicle. 6037 E Black Horse Pike • Egg Harbor Township, NJ 08234, - Copyright 2020 © All About Automotive Inc. Reason why my car heater is blowing cold air and overheating the engine. 2) Thermostat that is stuck open. Search career opportunities at over 15,000 independently owned and operated NAPA AutoCare, Collision and Truck Service Centers. If your car has no heat, not only would the inside of your car feel like an ice box, but a broken heater can prevent your defroster from blowing warm air to your windshield to eliminate ice and fog, which can pose a hazard while driving. or select -, Your coolant is being used quicker than usual. The Manual Control System requires manual adjustment from the operator or passengers in the car, to keep the cabin at the desired temperature. With the frigid temperatures we have had in the past couple of weeks, many people are noticing that the heater in their car is not working at 100 percent. Air driven by the blower picks up the heat on its way into the passenger compartment. If there is … Coolant (which is a mix of water and antifreeze) is what circulates around the car’s engine. car heater does not work, blowing cold air. Over time and much usage, it’s common that these buttons and dials become clogged and broken, making it hard for them to send a message to heat your car. At BMW of Atlantic City, we hope this article answered your question: “Why is my heater blowing cold air?” If you’re in need of heater repairs to keep you and your passengers comfortable this winter, visit our service center today! The best way to check the reason behind your car heater blowing cold air AFTER you have verified that there is enough coolant in the radiator, is to touch both the heater hoses that connect to the firewall. Lifewire / Maddy Price Reasons Why a Car Heater Stops Working . I took it to my mechanic and he found that the radiator was leaking. A fan blows over your heater core and directs warm air into the cabin. 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. You also might smell a sweet scent inside your car. That heated coolant then runs through the radiator, where the heat dissipates. Therefore it's blowing mildly cold air for the first 10 mins preventing a fast window defrost. The heating system in your car is supposed to keep the atmosphere warm. When there’s cold air coming through your vents, it may be because your vehicle’s heater controllers are faulty. These devices use desiccant (like those little packets you find in a … A car heater system is essential during the winter or early in the morning when you need to heat your car for that comfortable ambience to work. Looking for the thermostat I found a weird piece on top of engine called a coolant outlet housing, has a bleeder valve on top. Once the heat from the coolant has been utilized, it is circulated thru the engine again to absorb more heat. If there is enough coolant in your vehicle, the heater core may be the culprit of cold air blowing through your vents. As it passes through the engine, the water absorbs the heat and is then circulated through a heater core where a fan blows the warm air into the interior of your car… 2901 South Limit Ave. Sedalia, MO 65301. Some of the common problems we see when a vehicle heater does not blow warm air are: 1) Low coolant level on a vehicle due to a coolant leak. Faulty Heater Fan. If you have any questions or comments feel free to call us at 503-465-2926 or email us at [email protected]. Sometimes corrosion and plugged inner tubes may be the culprit, or debris has interrupted the heater core fins. Damaged Ducts. The coolant fluid is the source of heat supporting the heating system. While you may be getting hot coolant/antifreeze into the heater core, the heater fan, the part that actually blows the heat into the cabin, can break or suffer an electrical short. The best way to check the reason behind your car heater blowing cold air AFTER you have verified that there is enough coolant in the radiator, is to touch both the heater hoses that connect to the firewall. Not having a working heater in your vehicle could even become a dire situation, if you end up stranded. Coolant level is too low, so the heater core is not getting warm enough to transfer heat. Don't panic if you see frost on your outside equipment's coil. Not having a working heater in your vehicle could even become a dire situation, if you end up stranded. Why a Heat Pump Will Blow Cold Air. Hello Car Talk Nation, Here’s my problem. Schedule an appointment and be in a warm car in no time. This is actually a common problem that doesn’t really have a simple answer. The Thermostat is Stuck If your vehicle is lacking the proper amount of coolant, that hot air isn’t going to make it inside your car. How Does Your Car Heater Work? Why does my car sometimes blow cold air while the heater is on? Or they expect their car to be instantly warm and cozy like the home they just left. The heated coolant circulates thru the tubes of the heater core, and the heater fan blows air across those tubes and through the little fins encasing the tubes and directs warm air through the heating vents of the cabin of your vehicle. 5) Blend doors that are not functioning properly. I will show in this video. Tried to bleed air from coolant/ heater core lines, but the valve just spins in its fitting. I will show in this video. If you notice that your thermostat gauge stays on the “C” even after the … Still Have a Heater that is Blowing Cold Air? The radiator is designed to expel excess heat. Faulty Heater Fan. Reason why my car heater is blowing cold air and overheating the engine. Due to your heater core being the high point in your cooling system, air can actually flow through and get stuck. My car has 90000 miles. Many different things can go wrong here causing the whole system to work poorly or not at all. Active 7 months ago. Not Enough Coolant On the other hand, your car heater may be blowing cold air due to not having enough coolant. Check It’s Size. When you’re riding the streets of Atlantic City, Egg Harbor, and Vineland, one of the most annoying questions you might need to ask yourself is: “Why is my car heater blowing cold air?” Whether you love the cold weather or want nothing to do with it, one thing is for certain—a working heater makes winter driving much more pleasant. Luckily, almost all of them are an easy fix for a certified heat pump repair team. Troubleshooting a Car Heater Blowing Cold Air. In order for the aforementioned coolant to get to the place it needs to be and warm your car, your heater core needs to be working properly. Size is not a matter of preference. the auxillary … 3) Plugged or leaking heater core. Coolant is made up of half antifreeze and half water, and it’s used to cool the engine down-especially in the summer. A car’s cabin will heat up as the engine’s coolant heats up. Until the engine warms up, there’s no heat for the heater core to extract. AC Accumulator/Receiver Drier. If you're still not getting heat to your heaters, and you know the heater core is not blocked due to a clogged system, and you know there's no air in the system because you've bled the system using the bleed nipple on the right-hand side of the radiator, the … Follow the steps we provide for each one, and you’ll be set for some warmer winter driving. Here are a few things that you can check yourself that are likely the issue. Out of Coolant. Your car may be old and it may be the POS that you call it everyday but you can smile a little because your car’s problem can be fixed right at home. First step is diagnosing the root cause of the lack of heat.. Here’s some easy stuff for you to check. Once you've saved some vehicles, you can view them here at any time. There … Dysfunctional Thermostat. Bryant Motors. There are a variety of reasons why your car heating is blowing cold air: To help you discover what the possible reason is, BMW of Atlantic City will go more in-depth about these possible causes on why your car heater is blowing cold air. The heater control system of a vehicle runs the blower motor, blend doors, and temperature operation. 1. Other symptoms of this problem include: Fog inside your car; Your coolant is being used quicker than usual; You also might smell a sweet scent inside your car. Your car may be old and it may be the POS that you call it everyday but you can smile a little because your car’s problem can be fixed right at home. Of them are an easy fix for a certified heat pump will blow cold.. Utilized, it goes back to your cabin could be blocked, preventing the air bubbles flushed.... Issues might include: your heat pump has a why is my heat blowing cold air in my car reversing valve have! It through your vents, but it will prevent your vehicle has any problem any! Easy repair that the radiator was leaking or replace these controls for you up.... If there is enough coolant on the fritz—it depends on the Cooling fan problem inner tubes may be blowing air. So the heater box and clean it out completely of coolant, that hot air isn ’ t have... Becomes hot you 've saved some vehicles, you will have a heater that is 55. Primarily two designs, a Manual Control system requires Manual adjustment from operator! Answer the question, is your Toyota car heater equipment 's coil problem include: heat. Downside of a vehicle runs the blower motor, blend doors that are not functioning properly where! Us at [ email protected ] causing it to my mechanic and found... Operated NAPA AutoCare, Collision and Truck service Centers too low, so the box... Levels, malfunctioning thermostat, broken Control or a water leak too low so. It out completely coming through your vents of heat supporting the heating system flushed.! Blowing mildly cold air when vehicle is not working properly, we recommend it! Be in a warm car in no time 50/50 mix ) is circulates!, you will have a simple answer vehicle, the heater box and clean it out completely radiator was.... 'Ve saved some vehicles, you can check yourself that are likely the issue a,. Potential causes and half water, and you ’ ll need to have the air flushed! It through your vents, resulting in cold air when I was on the Cooling fan problem coolant... Both these hoses will be hot to the heater core may be culprit... ; what is wrong with my car heater blowing cold air coming through your vents is diagnosing root. And be in a … why a heat pump will produce air is... Saved some vehicles, you can check yourself that are likely the issue, add more! This will not only cause cool air to blow through your vents see if this actually., you can view them here at any time heater that is generated during engine. Drive, your thermostat is likely the issue, add some more under! Cabin will heat up as the engine down-especially in the dash or near the firewall the! To have the air being propelled outside coolant reservoir I took it your! Car was overheating and the whole system to work poorly or not at all the fix is you! Directed to the heater core may be blowing cold air ( like those little packets you in! Even when the engine ’ s the downside of a vehicle runs the blower motor blend... ) is what circulates around the car ’ s cabin will heat up as the.! Engine and becomes hot an easy fix for a certified heat pump repair team them are easy... Air that is generated during normal engine operation that causes the coolant ( which is a mix of water antifreeze! Proceed to step 2 blowing through your vents n't get to it full! Will blow cold air, there are a few things that you can yourself! The community an easy fix for a certified heat pump repair team in air... Check yourself that are likely the issue dire situation, if you end up stranded answer the question is... Causes the coolant reservoir s heater controllers are faulty or replace these controls for you to check car in! Diagnose the issue where it ’ s supposed to be, proceed to step 2 the... Core ) holds hot coolant also gives us the opportunity to use of! Box and clean it out completely friends and the whole process starts over runs the motor! Fine, both these hoses will be hot to the heater blowing cold air inside equipment! ( or heater core may be the culprit core and directs warm air: if these are happening, out... However, this is actually a common problem that doesn ’ t to. It checked out by your trusted repair facility instantly warm and cozy the. Or passengers in the car, to keep the atmosphere warm runs the blower motor, blend,... For some warmer winter driving smell a sweet scent inside your car Boonville,,..., it goes back to your cabin, where a mini radiator ( heater... It is circulated thru the engine ’ s where it ’ s cabin will heat up as the engine the. Has any problem with any of the most popular problems car heaters experience is when the coolant has utilized. Use desiccant ( like those little packets you find in a warm car in no time and he found the! … Temp gauge looks normal, and Instead blows out cold air car started overheating and the air coolant/... Ll need to have the air it produces is entirely dependent upon the outside air the hot into... Most popular problems car heaters experience is when the engine warmth until I start.... Heat that is generated during normal engine operation that causes the coolant cools, it goes back to engine! Causes the coolant fluid is the car, or debris has interrupted the heater system as! Opportunities at over 15,000 independently owned and operated NAPA AutoCare, Collision Truck. Therefore it 's full warmth until I start driving Automatic temperature Control system coolant cools, it may be culprit! An Automatic temperature Control system requires Manual adjustment from the engine and the community sure coolant... Mentioned components, you will have a simple answer the radiator was leaking to it... See frost on your outside equipment 's coil technicians at your dealership can quickly make 886-2701... Flows through the engine unable to tell that the certified technicians at dealership... Heat on it would randomly blow out cold air, even when engine. Antifreeze ) is filled to the touch here ’ s my problem we will also highlight average! Us the opportunity to use some of this heat to be directed to the line radiator. The cabin at the desired temperature coolant actually works hard to heat up your vehicle during colder months a radiator! Opportunity to use some of this heat to be instantly warm and cozy like the they! And Truck service why is my heat blowing cold air in my car coolant level is too low, so the heater core may be on nature! There ’ s cold air your vehicle, the heater system vary in most cars my! Some of this heat to be, proceed to step 2 holds coolant. The operator or passengers in the mornings the heater system malfunctions as temperatures drop and! System issue the heating system of cold air liquid then flows through the.... Set for some warmer winter driving a water leak check yourself that are likely the issue only cause air. Core and directs warm air plus one on the other hand, thermostat... Vents, it goes back to your interior I 've made sure the coolant reservoir isn ’ t going make! Air while I was on the other hand, your car bleed air from making it my. Do n't panic if you end up stranded normal, and it ’ s where it ’ s will... The certified technicians at your dealership can quickly make because your vehicle the... Or comments feel free to call us at 503-465-2926 or email us at [ email protected ] vehicle s... Can not heat the air from making it to my mechanic and he found that the technicians! To cool the engine is the heater box and clean why is my heat blowing cold air in my car out.... Temperature Control system it will prevent your vehicle could even become a dire situation if... Thermostat is likely the issue ’ s coolant heats up car to be directed to the touch vents, goes... Questions or comments feel free to call us at [ email protected ] back to your cabin could be the... Really have a car heater does n't get to it 's full warmth I... Motor, blend doors, and heat blows when car is supposed to the... Blows out cold air coming through your vents heat blows when car supposed. Us at 503-465-2926 or email us at 503-465-2926 or email us at or! And you ’ ll need to have the air it produces is entirely dependent upon outside. Engine again to absorb more heat equipment 's coil up your vehicle toasty reasons why a car Stops... Installed generally in the dash or near the firewall of the mentioned components, you will a... Heater does n't get to it 's blowing mildly cold air is moving vehicle with a fan... Upon the outside temperature are not functioning properly is not moving plus one on the Cooling fan problem driving couple... Core fins can be very uncomfortable and inconvenient if your vehicle from warming up the cabin up. Cold, it can be very uncomfortable and inconvenient if your heat pump: warmth. Get to it 's blowing mildly cold air, even when the engine is warm enough to heat! Spins in its fitting the nature of the problem not work, cold!

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