Front ac blower or resistor?

Discussion in 'Heating & Cooling' started by black7, Aug 9, 2018.

  1. black7

    black7 New Member

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    How can I tell if my front ac blower is out or the resistor is out? Back works fine.

    The fan was coming on sometimes and stopping. Now it will not come on at all.

    I am getting prices on replacement and its like $500 for something I can do in my yard in ten min.

    I just dont know how to tell which part to buy.

    I have attached a picture of the plug that plugs into my blower motor. It has black marks on it. What does that mean?

    2009 Expedition EB 4x4

    38801600_10161605230295347_2463482834556289024_n.jpg
     
  2. black7

    black7 New Member

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    Side note. Sometimes when AC does run I get a smell that smells like a new float. You know the smell. Like you are going to the lake and oh shit you forgot your float you stop buy a new one and it has that smell.
     
  3. Trainmaster

    Trainmaster Old School Member

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    If it runs fine on top speed, but intermittently or not at all on lower speeds, the resister or wiring to it is defective.

    If it doesn't run at all on top speed, it's either the wiring or the blower motor.

    Check that plug and the wires going to it. They are known to deteriorate and require replacing.
     
  4. stamp11127

    stamp11127 Super Moderator Staff Member

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    Do you have the automatic climate control?

    The black marks may be from the plastic when the connections overheating.
     
  5. black7

    black7 New Member

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    it is auto CC
     
  6. stamp11127

    stamp11127 Super Moderator Staff Member

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    Those don't have the old style blower motor resistors. Yours uses an electronic module (blower motor control module) that fails over time. You may need to repair or replace the plug also.
     
  7. AC Molina

    AC Molina Member

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    What if a 2008 ford expedition AC switches on in the rear, but no air from the front ones. any reason for that? also there are times when i am driving and then the front ac unit cycles on, once on it will not stop unless i turn engine off, then may or may not start again. lately it usually cycles on when i drive over 60-65 mph. the back ac unit turns on all the time.

    Someone told me it might be the ac switch?
     
  8. black7

    black7 New Member

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    it was the motor... That back bolt can suck balls
     

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