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Defrosters

While your windshield and rear window both have dedicated defogging systems, the same can’t be said for your side windows. However, there are ways to combat moisture buildup on the inside of your windows, as well as frost on the...

While the front and rear defrost will take care of fog or mist on the front and back glass, you’ll notice that sometimes the side windows fog up as well. Here’s how to defog them: Turn the air conditioner on....

Hi, I have seen this issue quite often on the PT Cruiser. This is typically caused by a failure in the heater core that is located in the dash. This part carries hot coolant into the interior of the car...

Hello - yes, the defrost function (https://www.yourmechanic.com/article/how-the-defroster-works) uses the air conditioning system to remove moisture from the air. The air is then re-heated using the heater functionality, and you now have hot, dry air to defrost the inside of the...

Hello. Most of the time this is a problem with the TIPM> You would need a scan tool to see if there are any codes in the TIPM or to see if it is commanding the defroster to come on....

Hello, thank you for writing in. The defroster within the mirror is rather simple. It uses a resistor to collect electrons which ends up resulting in heat. it is this heat that is used to defrost/defog the mirror. If the...

Hi there. the way the defroster works is the is heater on and the air conditioning is on to dry the air on the windows. The air conditioner compressor cycling on and off frequently is normal. Check the defroster vents...

Hi there. Check the blend doors to the vents and see if they move when the switch is turned. If they do not move, then check for a vacuum hose to the blend door actuator. If there is no vacuum...

Hi. There are a couple of reasons why your driver's side heated mirror is not working. The first thing that comes to mind is the fuse for the heated mirror has blown and is causing it not to work. Another...

Hello - there a couple of possibilities here for this problem: the blower motor resistor pack, or the fan switch portion of the HVAC control itself. The blower motor resistor pack regulates fan speed in the Low or Medium positions,...

While your windshield and rear window both have dedicated defogging systems, the same can’t be said for your side windows. However, there are ways to combat moisture buildup on the inside of your windows, as well as frost on the...

Hello. If the engine will stay cool with the AC on or when the vehicle is moving then there is a cooling fan circuit issue. The computer may not be turning on the fan when the engine is getting hot....

Hello. Yes, the defroster does use the air conditioning to defog the front windshield. If the a/c system is not functioning then the system will not work as designed. If you are having issues with it, consider YourMechanic, as a...

Hi there. All vehicles are set up to take the air from outside and have the air conditioning on to make the defroster work. There is nothing you can do to change the defrost settings.

Hello. If the rear defroster is working like you explain then it sounds like the rear window needs to be replaced. As the element in the window begins to short out internally various parts of it will stop working until...

Hi there. There is a blend door issue on your ducting to your heating and air conditioning system. Check all of the blend doors and make sure that they are working. The blend door that is not working properly can...

Hi there. The blend doors on your vehicle are operated by a vacuum hose. Check the vacuum lines to the engine and see if any of them are broken, has a hole, or is disconnected. Check the vacuum hose on...

Hi there. If you checked the fuse, defroster switch, main power tabs and the wiring but the defroster still does not work, then It is time to take a look at the relay. The defroster relay is normally located under...

The symptoms you are experiencing can be caused by a few different things. If you are hearing a gurgling noise and your heater is not providing heat, then I would check the engine's coolant. If the coolant is low, it...

Hello, on this particular model of vehicle they have whats called a blend door actuator in the HVAC unit under the dash. If it doesn't switch from defrost to front air, this is probably your issue. This repair is very...