Kia Optima: Rear Window Defroster
The defroster heats the window to remove frost, fog and thin ice from the interior and exterior of the rear window. The ignition switch must be on for the defroster to operate.
To activate the rear window defroster, press the rear window defroster button located in the center console switch panel. The indicator on the rear window defroster button illuminates when the defroster is ON.
The rear window defroster automatically turns off after 20 minutes or when the ignition switch is turned off. To turn off the defroster, press the rear window defroster button again. If there is heavy accumulation of snow on the rear window, brush it off before operating the rear defroster.
To prevent damage to the conductors bonded to the inside surface of the rear window, never use sharp instruments or window cleaners containing abrasives to clean the window.
To prevent the battery from being discharged, operate the defroster only while the engine is running.