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rear defog

1K views 3 replies 4 participants last post by  BruceP 
#1 ·
has anyone had issues with the rear defroster not heating up enough to melt ice?
seems barely warm enough to defog ....
2019 Impreza 5 door
 
#2 ·
You can set how long it stays on. Maybe having it stay on longer would help.
 
#3 ·
Default time is 15 minutes then it auto shuts off. You can switch it to stay on infinitely. I haven't had any problems with ice/snow here in CT, it seems to melt it fine. If you let it shut off after 15 minute though, it will start to fog up again.
 
#4 ·
How short a time do you expect it to be? Lets not forget if TOO much heat is applied to frozen glass, it will shatter. Hence - The electric heating elements are designed to be gentle.

If my rear glass was COMPLETELY covered with 1/4 inch of ice, I would expect it to take at least 40 minutes before I could remove the ice. Since I have driven a truck with NO rear window, I am OK with using side-mirrors when the rear window is iced.
 
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