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Heated Rear Window Not Working

A heated rear window that does not clear usually has a broken heating line, a loose or detached terminal on the glass, a blown fuse or a faulty relay or switch.

Normal risk

Not urgent, but fix it before winter. A misted rear window reduces visibility.

Short answer · Why is my heated rear window not working?

Thin lines on the glass heat up when current flows. If one line is scratched, that strip stays misted. If none work, check that the terminals on the side of the glass are still attached, then check the fuse and relay. Many cars switch it off automatically after a few minutes, which is normal.

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Safe checks you can do

  1. Check the indicator lightIf the switch light comes on, power is likely reaching the relay.
  2. Look at the linesA clear strip among misted ones shows a broken line.
  3. Check the terminalsLook at both sides of the glass for loose connectors.

Questions that narrow it down

  1. Is only part of the window clear?One or more lines broken.
  2. Does nothing work at all?Fuse, relay or terminal.
  3. Has the glass been cleaned with a scraper?Lines may be scratched.

Possible causes

Listed without ranking. Use the questions above to see which ones fit your car.

  1. Broken heating lineOne strip stays misted.
  2. Detached terminalWhole window cold.
  3. Blown fuseNo power.
  4. Faulty relay or switchNo power.

Questions about Heated Rear Window Not Working

Can broken lines be repaired?

Yes, small breaks can be fixed with a special conductive paint.

Is it normal that it switches off?

Yes, most turn off automatically after a few minutes.