Question about 2000 Ford F250 Super Duty Crew Cabs

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2000 Ford F-250, Fan switch/ blower motor...

The fan only blows when it is on high. The compressor pulls in on lower settings, but the fan won't come on. I show power to the blower anytime the it is turned on. Does the switch control grounding instead of power?
Should I read different voltage when the fan is on low versus high or mid?
Does the thermostat switch inside the housing control the blower? Thanks, Mike

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  • Mike Tillman
    Mike Tillman Oct 27, 2008

    I will give that a try. Thanks for the info. Mike

  • Mike Tillman
    Mike Tillman Oct 27, 2008

    Thanks for the info. I will try that. Mike

  • Mike Tillman
    Mike Tillman Feb 09, 2009

    Sorry for the delay. The truck is in North Alabama and I'm in Mobile. I will let you know as soon as I get back up there. Thanks, Mike

  • Mike Tillman
    Mike Tillman Feb 09, 2009

    Sorry for the delay. The truck is in North Alabama and I'm in Mobile. I will let you know as soon as I get back up there. Thanks, Mike

  • Derrick Jun 25, 2013

    i have a 2002 grandmarquis, the a/c blows on low, the air is still cold but the swith want turn it into high speed. Is the problem the blowerr or the switch

  • Anonymous Mar 16, 2014

    Heater works but fan will only work on high #4 setting. Is it my fan control switch?

  • Anonymous Mar 28, 2014

    blower works high only. new switch and resistor

  • Anonymous Mar 30, 2014

    run on high speed only and will not turn off by control switch

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  • 92 Answers

Sounds like blower motor resistor is shot.

Posted on Oct 26, 2008

Testimonial: "Good call. That did it. Thanks "

  • tom coady Nov 14, 2008

    was the resistor the problem ?

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