I own a 1996 Ford Bronco, with a rear window defroster.Just two days ago (01/15/08) the weather was 26 f outside, lite frost and dew on the inside rear window . I started the vehical and turned on the defroster and the rear defroster.
Within 10 min. the rear window blew out,totally, all the glass went inside the cargo area. I had to have it replaced today (01/18/08) to cost of $250.00 out of pocket.
This is to let the consumer beware of these conditions and mild cold temps. when using rear window defrosters.
I never thought it could happen, I 've used the rear defroster many times before.