2000 ford f150 4.2: heater/blower does not turn off when key is turned off, If I turn off fan with fan switch battery runs low. what can be causing these electrical gremlins?

Asked by Dec 26, 2014 at 12:37 PM about the 2000 Ford F-150 Work LB

Question type: General

2 Answers

22,110

YOur problem could be in the ignition switch. You vehicle may have an accessory position on the switch which allows power to be supplied to electrical components when the key is turned off. The position is usually all the way backward (toward the driver) from the off position. Your problem may be there.

22,110

If it does not have an accessory position then accessories usually operate from the "on" position of the switch. I'm placing my money on the ignition switch.

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