Ford F-150 owners have reported 3 problems related to defroster/defogger/hvac system rear window electrical heating element (under the visibility category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Ford F-150 based on all problems reported for the F-150.
On my way to work I turned on the rear defrost and heard a loud bang after 15 minutes. I pulled over to see what had happened and the read driver side windshield pain had shattered. It remained in the laminate but I got a replacement quote and its almost $1000 dollars. After doing research this is a major problem with the defrost mechanism on these trucks with no known fix. I'm glad it stayed in take but the glass is continuously cracking as I drive and I cannot get the repair done until Thursday and the dealer said they can do nothing except replace the glass and hope it doesn't happen again.
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Driver side back glass shattered due to window defrost on remote start up. Heating element in glass shorted out, arced, began smoking and shattered the glass.
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Unknown. Rear window suddenly shattered cause may be from defroster system. I’ve been reading several other drivers having the same issue with their rear window suddenly shattering when having the defroster running.