Skip the auto shop - Our mechanics make house calls

Q: Defrost button wont come on. Control power button doesnt work.

asked by on

Defrost button doesn't light up or work. The power control button doesn't work either,won't turn functions off. The air conditioning buttons work,the mix for defrost and floor work. The air recirculation button works. It won't switch over to just defrost,and the power control button not working

My car has 108000 miles.
My car has an automatic transmission.

A: It seems like the defrost of the vehicle ha...

It seems like the defrost of the vehicle has an issue. There are several possibilities that could cause this. The control unit for the climate control system could be malfunctioning. The fuse for the rear defrost could be blown due to some unknown reason. The windshield itself could be damaged and lost connection somehow. I would recommend having a qualified professional who is proficcient in electrical diagnosis inspect your vehicle with a wiring diagram. This will help to determine where the fault in the defrost system is located. Once the issue is found, I would recommend having the issue resolved as soon as possible to prevent any safety issues that could result from lack of clear vision through the rear window.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Not starting

Hello. You will need to have the vehicle tested to see if the spark plugs are getting spark. You can do this by pulling out one coil and using a test light or spark tester to see if there is...

Q: My car horn works when I lock the car but not when I push on the steering wheel

Hi there. When locking the vehicle, the antitheft computer beeps the horn to acknowledge the doors locking and the system arming. It sounds like your spiral cable, or clock spring cable, has broken. Are there any other steering wheel functions...

Q: Code P0420. Need to replace catalytic converter.

Hi there. The code P0420 is coming up for the Downstream Oxygen sensor has picked up an abnormal reading and is saying that the catalytic converter is below threshold. There could be a misfire on the engine, leaking injector, ignition...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...