fan only works on high

2000 FORD CONTOUR
145,000 MILES • 6 CYL
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CAROLYN ATWOOD
  • MEMBER
  • 1 POST
It blows good on high, but does not put out any air
on the others.
Aug 4, 2016 at 6:44 PM
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CARADIODOC
  • CAR REPAIR CONTRIBUTOR
  • 34,309 POSTS
That is typical of a defective blower resistor. It is bypassed on the highest fan speed. They have a thermal fuse built in, and those burn open from excessive current which is caused by a tight fan motor. The proper repair is to replace the resistor and the motor.
Aug 4, 2016 at 8:56 PM
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