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A/C only works with fan on #1

Tiny
FORDREPAIR
  • MEMBER
  • 2003 FORD FOCUS
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 80,000 MILES
The A/C in our Focus will only work if the fan is on the #1 setting (which does not blow much cool air into the car). If we put the fan on a higher speed the A/C light on the A/C dash switch goes out and it stops operating. I am assuming this is a fan switch related problem?
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Monday, August 9th, 2010 AT 1:24 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

It does sound like you might have a faulty blower switch.
The best course of action would be to inspect the switch and check to see if it has an output while it is on any other setting than the low speed.
This can be done by accessing the back of the switch and turning on the inoperative speed and see if there is power output to the wire.

https://www.2carpros.com/articles/how-to-check-wiring

If there is no power, then it is a faulty switch and will need replacement.
If it has power, then check the blower motor resistor.

I have attached diagrams for your reference.

Please let me know if you have any questions.
Thank you.
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Monday, January 3rd, 2022 AT 11:02 AM

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