If the light comes on you have power.
Car back window heater not working.
That is until something put a little nick or scratch in one of those delicate lines across the glass.
Use an ice scraper to scrape the windows both inside and out.
But the defroster became standard issue for rear windows and the world was a better place.
As it goes back and forth across the window everything comes on and shuts off.
One possible cause for the heater not to work is a break in an element.
If the blower motor is malfunctioning the defroster will not work.
However turn on the rear wiper and everything works as long as the wiper is not in the home position.
Heater windows radio wipers all work in the acc key position.
Start the car and it all shuts off.
Fixing a heated rear window fuse check.
If this happens to be the case you can use a soldering gun to reattach them.
Remember the timer will turn off the current within 5 to 10 minutes so you ll need to keep track of the timer s time window or you ll be looking for current that s not supposed to be there.
Examine the fuse to see if it has blown.
The battery could be the problem if you find that other aspects of the car are not working in addition to the defroster.
Repairing heater element with conductive paint.
There is a chance that you are missing terminal edges on your window heat grid.
If the new fuse.
Clip the lamp.
Issues can range from a blown fuse to a bad blower speed controller.
Then the system stopped working.
The heating and defrosting system rely on an electric blower motor to move the hot air into the cabin of the car and through the defroster vents.
Make sure the rear defroster switch and the ignition key are turned on.
It was widely accepted in the car business that a car more than 5 years old would likely have an inoperative rear.
If the exterior frost layer is thin your windshield.
Turn your windshield wipers on when you get in the car.
Jumping the car or replacing the battery can solve this problem.
If it has replace it and test the heater again.
How to defrost a car window without a heater step 1.