Defrosters clear condensation from windows and melt frost, ice and snow. They work differently depending on whether they are for the windshield or the rear window.
How to activate Recirculation mode in defrost mode?
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Is there a connection between the car heater and the rear window defroster? - Quora
Okay either im an idiot or my defrost isn't working properly. this is the third morning this is happened to me it is about 70 to 71 outside and I turn on
Rear defogger/defroster not working - out of warranty/tinter broke it? *FIX*
Why isn't My Defroster Working? - McCarthy Morse Chevrolet Blog
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Chevrolet Blog McCarthy Morse Chevrolet, Overland Park KS