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Defrost Or Defogger Not Working

The defrost or defogger won't clear your windshield or rear window. This can be airflow/mode-door, AC, or rear-defrost element problems.

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Common causes

  • Mode-door actuator not directing air to the windshield
  • AC not running to dehumidify the air
  • Broken rear-defrost grid or connection
  • Blown defroster fuse or switch fault
  • Clogged cabin air filter limiting airflow

Frequently asked questions

Why won't my windshield defog?

Defrost relies on strong airflow to the glass plus the AC drying the air; if the mode door, AC, or filter is faulty, the fog won't clear.

My rear window won't defog — why?

The rear defroster uses a heating grid printed on the glass; a broken line or bad connection stops it from working.

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