Car Back Window Heater Not Working

Jumping the car or replacing the battery can solve this problem.

Car back window heater not working.

Use an ice scraper to scrape the windows both inside and out. However turn on the rear wiper and everything works as long as the wiper is not in the home position. Examine the fuse to see if it has blown. 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. Start the car and it all shuts off. If the light comes on you have power. Clip the lamp.

Disconnect both wires from either side of the defroster grid and touch one end of your tester to each wire. There is a chance that you are missing terminal edges on your window heat grid. If it has replace it and test the heater again. Heater windows radio wipers all work in the acc key position.

If the exterior frost layer is thin your windshield. Fixing a heated rear window fuse check. If the new fuse. That is until something put a little nick or scratch in one of those delicate lines across the glass.

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. It was widely accepted in the car business that a car more than 5 years old would likely have an inoperative rear. But the defroster became standard issue for rear windows and the world was a better place. Trace the current path from the fuse to the switch to the timer and on back to the window.

One possible cause for the heater not to work is a break in an element. As it goes back and forth across the window everything comes on and shuts off. Repairing heater element with conductive paint. If the blower motor is malfunctioning the defroster will not work.

Issues can range from a blown fuse to a bad blower speed controller. Then the system stopped working. The battery could be the problem if you find that other aspects of the car are not working in addition to the defroster. Turn your windshield wipers on when you get in the car.