2001 Ford F-150 blower fan not working properly

2001 FORD F-150
130,000 MILES • 5.4L • V8 • 4WD • AUTOMATIC
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ALL4JANDZ
  • MEMBER
  • 1 POST
My fan only works on the highest setting. It makes no difference which vents are selected, though I don't think that's relevant.
Sep 4, 2014 at 2:35 PM
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CARADIODOC
  • ✓Experienced Mechanic
  • 34,411 POSTS
Suspect a defective heater fan resistor. If a new one solves the problem, replace the fan motor too. When they get tight, they draw higher current than normal and burn open the thermal fuse on the resistor assembly.
Sep 4, 2014 at 3:06 PM
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