A/C heater fan stopped working

Tiny
TERI HANSON
  • MEMBER
  • 1996 FORD THUNDERBIRD
  • 1.6L
  • V6
  • 2WD
  • AUTOMATIC
  • 96,000 MILES
Was running the A/C when there was a puff of smoke from the vents and fan quit working.
Tuesday, February 13th, 2018 AT 2:23 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,910 POSTS
There are two versions of control system. If you have the manual system, with no test results to analyze, the best suspect is the thermal fuse for the fan motor resistor burned open as a result of the fan motor having tight bearings. The clue is the fan will still run on the highest speed. If it does not, it is also possible, but much less common, for the motor to be shorted. That would cause a 30-amp inline fuse to blow. To find this, start by measuring the voltages on the two motor wires when the ignition switch is on.
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Tuesday, February 13th, 2018 AT 5:25 PM

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