Q: Heat Defroster Not Functioning Correctly

asked by on

All of a sudden, when I turn on the heater, my windshield and side windows fog up and do not clear. Also, there is a smell when the heater is turned on. The fogging of windows seems to be somewhat intermittent.. Example Driving to my daughter's Friday afternoon, the windshield and side windows fogged and would not clear. Later that evening driving home, the defroster worked fine. The heater heats fine, it is the smell and defroster that seems to be affected. Do you know what is happening and how much it will cost to repair?

Thanks,

My car has 159715 miles.
My car has an automatic transmission.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Heat Defroster Not Functioning Correctly

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car will blow cold air but will not blow heat

The heater not working in some cases may be related to the overheating problem you are also having. This may be due to a faulty heater blower motor or potentially a bad heater core. As you may know, the heater...

Q: Thermostat - 2009 Mercury Milan

Hello there. This is a common issue with your Mercury Milan. If the coolant temperature sensor reads improperly, it will set the service engine light and require replacement. This sensor is located in the thermostat housing. You can buy the...

Q: Q: Overdrive not working.

It sounds like you are having an electrical problem that is affecting several systems. These can be tricky to diagnose. Sometimes they can be tied together and fixed with a single repair or several different repairs may need to be...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.