It’s important to address problems with car heaters as soon as possible. If you notice any of these issues or can’t get heat to blow out of your vents, contact a reputable local auto repair shop to look at your heating system. If any of these three are leaking, your car heater won’t work properly.Īn effective heating system can make for a much more enjoyable winter. There are many different places leaks can surface, so be sure to check your hoses, radiator and water pump for damage. The last common problem with car heaters is a water leak. Thermostats are a relatively easy and inexpensive fix, so installing a new one can get your heater working again quickly. If the thermostat can’t signal to the car that the engine is warm, the coolant won’t be sent over to provide heat to your heater core and the air will stay cool. If you notice that your thermostat gauge stays on the “C” even after the engine has time to heat up, you may have a broken thermostat. If that piece is not working right, your car could get stuck blowing cool air into the cabin. The heater control valve is underneath your hood and acts as the switch that turns the heat on and off. If the coolant levels are fine and there doesn’t seem to be a problem with your heater core, you may need to replace some of the control buttons or your heater control valve. Sometimes after using the control buttons for several years, they can get gummed up and stop working. Reason #3: Broken or Clogged Heater Controls If you suspect that something is amiss with your car’s heater core, watch for these signs: If your car is not blowing warm air into the cabin and the coolant level is fine, then you could have an issue with your heater core. Heater cores are typically situated directly in the back of dashboards. A heater core is responsible for a vehicle’s defrosting and heating actions. A heater core is made up of brass or aluminum tubing that carries the hot coolant in and out, along with fans that disperse the heat released by the coolant. Heater cores, in a nutshell, are cooling system parts that resemble compact radiators. Reason #2: Problems with Heater CoreĬar heater problems are also frequently associated with heater core difficulties: coolant may not be traveling through the heater core properly, the air from the blower motor is not reaching it or there’s a clog in the small tubing of the heater core. When your car is low on coolant, it won’t be able to send any to the heater core to create warm air. If cool air continues to blow out, the first thing you should check is your coolant level. It can feel cool for the first few minutes because the engine has to warm up in order for the coolant to heat up and provide heat to your interior. 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. Your car uses coolant – usually made up of 50% antifreeze and 50% water – to cool your engine down, especially during the hot months of summer. Let’s take a look at each of these issues more in-depth… Reason #1: Not Enough Coolant If one or more of these issues is present, your vehicle may blow out cool air rather than heat: Several things can potentially go wrong with automotive heaters because, much like a home heating system, there are many components working together to heat your car. Unreliable car heaters can make the cold winter months practically unbearable. If your car heater is suddenly blowing out cold air instead of heat in the middle of a bitterly cold winter, you have a good reason to be frustrated. Car issues can make people scratch their heads.
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