What to Do If the Rear Window Defroster Is Broken?

[StSamantha]

The issue with the rear window defroster not working might be due to a broken heating wire in the rear windshield. Replacing the heating wire should resolve the problem. The primary function of the rear window defroster is to remove frost from the rear windshield. Its basic principle involves heating the glass through the electric heating wires embedded in the glass layers, raising the glass's temperature to evaporate fog and water droplets on the surface. Fogging on the windshield occurs when there is a significant temperature difference between the inside and outside of the car. If the outside temperature is lower than the inside temperature, the warm air inside the car condenses on the inner surface of the windshield, forming fog. Conversely, if the inside temperature is lower than the outside, water vapor in the atmosphere condenses on the outer surface of the windshield, creating fog.