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      03-11-2013, 08:56 PM   #1889
PINeely
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Drives: 2013 535i, 2015 Tundra 1794
Join Date: Jul 2009
Location: Jackson, MS

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Quote:
Originally Posted by umlaut View Post
My defrost wasn't working so I took it into the dealership. The mechanic said the defrost won't work if the battery isn't fully charged - apparently the car shuts down "nonessential" features when it has a low battery. Has anyone else come across this?
A low battery can absolutely cause that kind of problem but I don't think there is any rhyme or reason to it... headlights, TPMS or DRLs usually go first when the battery is dying.
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