How Car Heaters Work?

How Car Heaters Work

In this post, I will explain how car heaters work.

You’ve probably seen people on the side of the road, huddled around their car with a yellow tarp over it. It can be tempting to think that they are just lazy or don’t know what they are doing. But chances are, there is something wrong with their vehicle and they need help.

The most common reason for this scenario is a frozen engine block. This happens when you drive your car in cold weather without turning on your heater first, which causes the coolant to freeze up inside of your car’s engine bay even though it might seem warm outside. When this happens, you will need to get an experienced tow truck driver to come out and break into your engine block so that you can then replace the coolant.

The second most common reason would be a bad car battery. This means that you will need to replace the battery with a new one so that your vehicle can function again. There are several ways you could do this but the most common way is to go to an auto shop and have them provide you with one.

The third most common reason would be a frozen thermostat. This may not seem important right away, but it is actually very important because without a working thermostat your engine cannot maintain the correct temperature inside of itself. If this happens, you will need to replace it with a new one at an auto shop.

Once the car heater has been fixed, the car will need a good washing to remove all of the dirt and grime on it. You can do this yourself, or have a professional autobody shop take care of it for you. Either way, getting your vehicle cleaned is among the most important steps you can take in making sure that your car works correctly.

Another thing that can frequently happen is that car heaters will stop working after a few years of use. This happens because the heater core has become clogged with dirt and dust, which blocks airflow out of the vents in your vehicle. And since it needs airflow to work, this means that you will need to get your heater core replaced at an autobody shop.

The bottom line is that car heaters are important because they provide warmth on cold winter days, and help to maintain the inside of your vehicle at a comfortable level if it isn’t being used for long periods of time. If you have a broken one, then you will need to get it fixed as soon as possible so that you can get back to enjoying your vehicle.

By the end of the article, readers should know how car heaters work, and also have a list of all three reasons why you might need to call a professional for help with getting your heater fixed. This is because it’s an important part of keeping your car running well in the winter, and also because it’s not an easy thing to do on your own!

What are car heaters used for

Heaters in cars are used to keep them warm on cold days, and maintain the inside at a comfortable temperature if they’re not in use for a while. The heater will get warmer the longer you use it or if you leave your car outside during the night!

Two main types of car heating systems

There are two main things that make up the heating system in your vehicle; the heater itself which is inside, and any external pieces. For example, you might have a remote control on your keyring to open or close your windows.  

The heater usually includes a blower fan, an electric motor that runs it, a heating core that produces the hot air, and some kind of fan or switch that helps regulate the flow. There might be a dial with which you can set the temperature.

How Car Heaters Work?

Every heater has a heating element inside of it designed to heat up and send warm air through the vents. If you have an external cooling fan, it will help move air through the heater system to distribute the warm air more efficiently.

When your car is running, if you turn on your heating system it comes directly from the engine’s cooling system . The water that goes around the engine to keep it cool also passes through a heating element inside the engine. The water then goes around the engine again, and that heat is transferred to the air inside your vehicle. This can be very dangerous if you’re not careful because there will be extremely hot water in the cooling system! If you try to open a window while it’s running, steam will come out and may burn you.

The heating system usually warms up the car within a few minutes. If you have a remote starter, it will start your ignition and turn on the heater so the inside will be warm when you get in.

How do I know if my car heater is broken

If your car heater has stopped blowing warm air, you may need to have it checked out. If it is broken, the best thing to do is see your mechanic. The first step will be to take off the grill and then remove any other obstructions that are blocking access to the fan motor. Depending on where the problem is, they may need to replace the fan motor or other parts of the system.

You can still use the heater in this situation, just without the fan blowing. This will take longer to heat up, but you’ll be able to keep warm while your car is being repaired.

What can cause your car heater to break

If your car heater is not running, but you notice that the climate control display is on, it might be because the heater resistor has gone bad. The heat breaking might be due to a problem with fuses or blower motor. If you notice that the fan for the heater is blowing but not heating, it could be because of a dirty filter. It might also be because of obstruction in the air flow; make sure to check around the blower fan for any items that may have fallen in it.   

If your car is not heating when you turn on the heater, it can be due to many different things. A faulty thermostat could cause the heater core to freeze shut if the engine is cold. There might be a problem with the control circuit for the heater, or the heater switch itself could be faulty.

Make sure that all of your fuses are in place and check to make sure that they aren’t blown out. If this does not resolve the issue, it might be time to replace your car’s heater blend door which regulates the flow of cold and hot air through your vents.   

If you have a faulty air conditioning compressor, this might cause low AC airflow which will lead to a loss in heat. Some cars have a dual evaporation cooling system where both refrigerant is used to cool the air when it is being heated during defrosting or when the AC is turned on.   

If you have a faulty heating core, this might cause low heat levels due to restricted flow of hot coolant. This can be caused by a defective thermostat which needs to be replaced with a new one. If it’s a blocked passage that causes the blockage, you will need to replace the heater core. If you have a faulty water pump, this might contribute to low heat levels as well.   

If you are having problems with your car heater, try to isolate the problem by checking if it is related to one specific system or several systems. This way, you can correctly identify which part needs replacing and get it replaced at the right time for the best price.

How Car Heaters Work

Tips on how to keep your car running well in the winter

It’s never a good feeling when you get in your car and it won’t start, but if you have some tips on how to keep your car running well in the winter, you’ll know what to do. Here are a few things that can make a difference:

Check your tire pressure – This is a very simple thing that many people neglect, but if there is too much air in your tires, they will take up more space which will be taken away from heating the cabin of the car. Another reason for checking this is because low pressure can lead to serious damage.

Keep fluids topped up – The coolant needs to be kept at the right level or else the engine isn’t going to work well during colder times. It can also lead to overheating when it is not at the right level when the summer comes around. If you’re having problems with this, there might be a problem in your car’s cooling system. The antifreeze needs to be within a certain range or else you could have issues down the line, too.

Make sure that wiper blades are in good condition – If you can’t see, this is going to make your life a lot more difficult. A few bucks for new blades might be something that save you money later on. Keep them clean and replace them as needed to keep the windshield clear of snow and frost.


If you want to keep your car running well during the winter, it’s important that you take care of what can be done. The tips in this article should be a good start if you’re looking for some guidance on how to do just that! Remember, small things like checking tire pressure or keeping fluids topped up are simple things but they’ll go a long way when it comes down to maintaining heat in your vehicle.

If these solutions don’t work, then there might be something more serious going on with your vehicle and we recommend enlisting the help of an expert technician before taking any drastic measures.  

If you need help getting started or would rather have someone else handle everything for you so all there is left for you to worry about is driving your car, then contact a company for more info and assistance with your heating problems!

References : Your car’s heating system


I am John Oakley. I love to share tips and reviews on products to keep our homes warm and comfortable.

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