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air conditioner loud hum on high setting???

Discussion in '4 Cylinder' started by tjbee2003, Jul 25, 2011.

  1. Jul 25, 2011 at 5:36 AM
    #1
    tjbee2003

    tjbee2003 [OP] Member

    Joined:
    Jun 11, 2009
    Member:
    #18307
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    Male
    Vehicle:
    09 Off Road
    I got my '09 Tacoma back from the dealership last week after 30K service and noticed this weekend that when the air conditioner is on high, there is a loud hum sound. That sound was not there before. Can someone tell me what's causing this and if I can fix it without having to go back to the dealership?
    Please help. Thanks in advance!
     
  2. Jul 25, 2011 at 6:02 AM
    #2
    nathanscot

    nathanscot Active Member

    Joined:
    May 26, 2011
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    First Name:
    Nate
    Raeford, NC
    Vehicle:
    '10 TRD offroad
    TRD 4.0L Supercharger, TRD Catback Exhaust
    It might be the blower motor. I had a problem with mine as well. It was more of a ticking sound though and I've heard that the past few year taco's have been having problems with the blower motors.
     
  3. Jul 26, 2011 at 6:47 PM
    #3
    jsutter

    jsutter Well-Known Member

    Joined:
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    Jim
    Akron, Ohio
    Vehicle:
    08 Reg. Cab 4cyl 2wd
    cruise and intermittent wipers
    This might be too simple, but last week my truck was making a loud hum/whistle noise when the A/C was on high. I was searching the cab for the problem and playing with the nob settings when I opened the door to go under the hood the noise went away, shut the dorr and the sound was back. It turns out one of the windows was just barely open and it was the sound of air escaping the cab through the cracked window.
     
  4. Jul 26, 2011 at 6:49 PM
    #4
    BradleyScottETC

    BradleyScottETC Class IV Category 8 Elite VIP Member (Only)

    Joined:
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    #20521
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    Bradley
    Lake County, FL
    Vehicle:
    10 4.0 AC 4x4
    check your blower wheel and make sure there isn't any trash in it- pull the glove box and cabin air filter and inspect.
     
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