When the weather is really cold the heater will not turn on unless I Move the fuse

Tiny
TRAVIS PERKINS
  • MEMBER
  • 1988 FORD F-150
  • 5.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
So here is a good one. When it is really cold outside the blower for my heat will not turn on unless I move the fuse. Like take it out and put it back. I have already replaced the fuse and it still does it, but only when it is cold. When it is warm it works perfectly.
Wednesday, January 4th, 2017 AT 5:28 AM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
If moving the fuse around resolves the problem, that would indicate a connection problem in the fuse box, likely from corrosion causing too much resistance on the circuit. There may be other areas in the circuit with the same issue. You could also have a blower motor that is requiring too much current to get started. Voltage supply and demand is a cumulative problem and multiple issues can contribute to it.
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Wednesday, January 4th, 2017 AT 5:43 AM

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