Subaru 2003 Forester Owner's Manual page 167

Instruments and controls
Automatic climate control system
The rear window defogger operates only when the ig-
nition switch is in the "ON" position.
The rear window defogger switch is located on the cli-
mate control panel.
The defogger will automatically shut off after about 15
minutes. If the window clears before that time, push
the switch to turn it off. It also turns off when the igni-
tion switch is turned to the "ACC" or "LOCK" position.
If defrosting or defogging is desired when you restart
your vehicle, you have to push the switch to turn it on
again.
To turn on the defogger, push the switch. To turn it off,
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push the switch again.
The indicator light located on the switch lights up while
the rear window defogger is operating.
y Do not use sharp instruments or window
cleaner containing abrasives to clean the inner
surface of the rear window. They may damage
the conductors printed on the window.
y To prevent the battery from being dis-
charged, do not operate the defogger continu-
ously for any longer than necessary.
HS4021DA