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ZX2 A/C blower fan will not go into highest speed

Tiny
SNETHEJ
  • MEMBER
  • 1999 FORD ESCORT
  • 99,000 MILES
I've seen many questions and answers regarding the fan only working in high speed, but my fan will not go into high speed (I'll call 4). It will work in positions 1, 2, and 3 just fine (or should I say, low, low-medium, high-medium?). Does that seem like a relay issue like some of the other blower issues, or something else?
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Thursday, September 1st, 2011 AT 11:40 AM

3 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
That's probably a bad switch but should be tested first.
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Thursday, September 1st, 2011 AT 12:04 PM
Tiny
SNETHEJ
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  • 9 POSTS
I pulled the connector on the resistor to test the switch and the switch seemed to be working. As it turns out, the connector on the resistor looked like it had overheated at one time, melting the connector a little. The connection was a little corroded and all I did was cleaned the connectors on the plug and the resistor a little and it started to work.
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Monday, October 10th, 2011 AT 10:28 AM
Tiny
WRENCHTECH
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I guess that would make sense. The reason I didn't suggest the blower resister in the first place is because an internal problem with the resister effecting high speed would have also taken out the lower speeds but an external plug problem would not. Glad you found the problem.
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Monday, October 10th, 2011 AT 10:37 AM

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