389 blower issue, front fan for climate control works on high only.

Discussion in 'Peterbilt Forum' started by Tall Mike, Apr 15, 2019 at 6:04 PM.

  1. Tall Mike

    Tall Mike Road Train Member

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    Front fan for climate control works on high setting only (number 4) if I back it off to 3, 2, or 1 the fan does not work at all. I was told the 379's had a resistor for fan settings does the 389 have the same ?

    Second problem with the climate control is I either have full heat or no heat. If I rotate the thermostat dial back towards cool I lose all heat. Bunk seams to work just fine no issues there yet.


    any thoughts ?
     
  2. 062

    062 Road Train Member

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    Tall Mike Thanks this.
  3. Goodysnap

    Goodysnap Road Train Member

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    Fix the blower first and see how the temp feels after repair.

    Yes, the resistor is near the blower motor and a cheap swap. If still no go l pull the HVAC controller and look for melted pins/connector at the blower switch. If you find melted connections, it needs a blower motor plus repair the connections and or replace the switch.
     
    Last edited: Apr 15, 2019 at 7:13 PM
  4. Tall Mike

    Tall Mike Road Train Member

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    Thank you for the reply.
     
    Goodysnap Thanks this.
  5. spsauerland

    spsauerland Road Train Member

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    When you pick up your resistor block might as well get a cabin air filter. Resistor is pretty easy to get to right behind glovebox.
     
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  6. Tall Mike

    Tall Mike Road Train Member

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    20190416_121524.jpg 20190416_123256.jpg
    It was on the back side of the blower motor if anybody else has a problem with it.
    1/4 socket is what I used.

    The old resistor looked a little worn !

    Blower works fine on all settings now, thanks again for the help.
     
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  7. Tall Mike

    Tall Mike Road Train Member

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    I'm wondering if the temp actuator is causing my temp issues ?
    Hate to just throw parts at it and hope for the best especially at Peterbilt prices. 20190416_124026.jpg
     
  8. Goodysnap

    Goodysnap Road Train Member

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    If you cycle cold to hot. Actuator should go from mark to mark. Pull it off and make sure the door moves. Dont try to force it with the blower on. The air flow will hold it closed with the actuator off.
     
  9. Tall Mike

    Tall Mike Road Train Member

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    Thanks again !!
     
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