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Heater Fan only works on high

Discussion in 'Technical Chat' started by Love My Taco, Dec 7, 2009.

  1. Dec 7, 2009 at 7:11 PM
    #1
    Love My Taco

    Love My Taco [OP] Active Member

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    Anybody else had this problem? Heater fan only works on high setting. Not sure if it's the fan itself or maybe dirty contacts or something on the dial itself. Thanks in advance.
    :confused:
     
  2. Dec 8, 2009 at 7:16 AM
    #2
    quattrokiwi

    quattrokiwi Well-Known Member

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    i had this happen in a 1990 toyota pickup.
    It was the blower motor resistor. Napa had the part for me.
     
  3. Dec 8, 2009 at 7:20 AM
    #3
    NAAC3TACO

    NAAC3TACO Just east of crazy!

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    I agree. That problem is almost always the resistor.
     
  4. Dec 8, 2009 at 7:23 AM
    #4
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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  5. Dec 8, 2009 at 1:06 PM
    #5
    lizard1

    lizard1 Well-Known Member

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    It's the resistor. Mine went out a few months ago. A/C only blew on high setting. Truck was under warranty at the time - no charge. Otherwise, it's a quick job - maybe a DIY.
     
  6. Dec 8, 2009 at 5:31 PM
    #6
    Love My Taco

    Love My Taco [OP] Active Member

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    Cool. I'll try to get to it this weekend if I can fit it in between football and beer drinking. Thanks.
     
  7. Dec 24, 2009 at 12:01 PM
    #7
    Love My Taco

    Love My Taco [OP] Active Member

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    Thanks for the tips guys. Got the new resistor pack, put it in last weekend. It worked for about three days, and now I have the same problem again, it only works on high, and is somewhat intermittent. I don't know if the new part was faulty, or what. Anybody else had this problem repeatedly? I guess I'll see if I can return the part and try again. Oh yeah, Merry Christmas everybody!
     
  8. Feb 26, 2010 at 9:43 AM
    #8
    Agent475

    Agent475 "Mark It Zero"

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    Anyone find a fix for this... I'm having same problem now.
     
  9. Feb 26, 2010 at 9:53 AM
    #9
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Motor resistor
     
  10. Feb 26, 2010 at 2:13 PM
    #10
    Love My Taco

    Love My Taco [OP] Active Member

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    after I put the new resistor pack in, it worked for a while, then caput. Then one day my buddy was riding shotgun, and went to get something out of his pocket, pushing his foot up in that area under the dash, and low and behold the heater fan kicks on! So it turns out mine was a bad connection on the wiring harness that goes into(or right next to) the resistor pack. Haven't fixed it yet, but you may want to turn your fan on any setting but high, and reach under there and wiggle it.
     
  11. Aug 12, 2010 at 3:59 PM
    #11
    Mr Goodwrench

    Mr Goodwrench Member

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    Same problem... high speed only. Because of this thread I found the fan resistor block easy and took it out.... On the resistor block there is a spring loaded contact that is kept closed by solder. When it heats up the solder melts and the contact opens. You can fix it by holding the contact closed and resoldering it. Did that and fan works on all speeds. I think my drain hole is plugged and the condensate water collects inside the plenum (Where the resistor block lives) The water shorts it out and the contact opens. Really easy fix!!!!!!

    Dennis
     
  12. Dec 27, 2013 at 10:38 AM
    #12
    se2schul

    se2schul Member

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    Had the same problem.
    Searched TW and found this thread.
    In my case, it was a bad connection. I was able to scrape the connector a bit, then wiggle the connector onto the resistor.
    Works fine now!!
    TW saves me money with an easy fix, yet again!
     
    DistortedAxis likes this.
  13. Dec 27, 2013 at 11:27 AM
    #13
    03is300ztk

    03is300ztk Well-Known Member

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    Why necro bumb a dead thread?
     
  14. Feb 6, 2014 at 8:43 PM
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    bowhunter1994

    bowhunter1994 Member

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    Where is this resistor you all are speaking off??
     
  15. Feb 6, 2014 at 8:50 PM
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    Sigi

    Sigi Well-Known Member

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    There is a thread on here about it . But it's on the passenger side under the glove box.
     
  16. Dec 22, 2016 at 5:51 AM
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    DistortedAxis

    DistortedAxis Well-Known Member

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    Bumping an old thread...

    Im having this issue. Blower fan ONLY works on high. Other speeds, nothing.

    I replaced the resistor and it worked for 1 week. Then stopped again. I've checked the connections and nothing. I bought a new resistor again and installed it. Everything is working....

    Just wondering if anyone has a picture of the connections that everyone is referring to?

    Also, any other input on the debacle?
     
  17. Dec 23, 2016 at 12:44 AM
    #17
    Wyoming09

    Wyoming09 Well-Known Member

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    Just curious where all these bad resistors are coming from.

    These are cheap enough I just use the Toyota ones .

    Trying to use used ones always fails they break on the install or soon after.
     
  18. Dec 29, 2016 at 9:47 AM
    #18
    possum77

    possum77 Member

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    These are what's causing my fan to stop. That's 2 times. And as you can see it's always the same wire connection. I did away with the plug and just use slip on connectors now. Still the same problem but longer time in between changing it out and only 1 connector to change

    image.jpg
     
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