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No ac in cab, but works in sleeper

Discussion in 'Volvo Forum' started by 4wheelBoater, Jul 29, 2019.

  1. Jul 29, 2019 #1
    4wheelBoater

    4wheelBoater Bobtail Member

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    Jul 29, 2019
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    2007 Volvo vnl 670 w/D16. Lost blower function in the cab. Diagnostics is showering stepper motor electrical fault on all 4 phase and a 5v supply electrical fault. When idling there is no air and when driving it blows gently. Any idea if it would be the switch or the blower?
     
    4wheelBoater, Jul 29, 2019
    4wheelBoater, Jul 29, 2019
    #1
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  3. Jul 29, 2019 #2
    boneebone

    boneebone Road Train Member

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    Run a set of jumper wires to the blower motor and see if it spins at full speed, if it does the switch is the problem.
     
    boneebone, Jul 29, 2019
    boneebone, Jul 29, 2019
    #2
  4. Jul 30, 2019 #3
    KB3MMX

    KB3MMX Road Train Member

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    You can plug in a new blower control module to test. If that doesn't work it is probably the blower motor itself.
    Takes about 45 mins to fix
     
    KB3MMX, Jul 30, 2019
    KB3MMX, Jul 30, 2019
    #3
  5. Jul 30, 2019 #4
    4wheelBoater

    4wheelBoater Bobtail Member

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    Jul 29, 2019
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    A new control module is around $400, that’s an expensive “test” if that isn’t it. Just thought maybe someone had had this happen before and would have a heads up
     
    4wheelBoater, Jul 30, 2019
    4wheelBoater, Jul 30, 2019
    #4
  7. Aug 6, 2019 #5
    d281833

    d281833 Heavy Load Member

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    Mine was doing the same thing, so I went for the low hangin' fruit and replaced the blower and module at the same time seein' as I had everything apart. Blower was 160 bucks I think and the module was 65. Works fine now.
     
    d281833, Aug 6, 2019
    d281833, Aug 6, 2019
    #5
    KB3MMX Thanks this.
  8. Aug 8, 2019 #6
    KB3MMX

    KB3MMX Road Train Member

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    $60-70 , I keep a spare
    Friggin easy to check too
     
    KB3MMX, Aug 8, 2019
    KB3MMX, Aug 8, 2019
    #6
    d281833 Thanks this.
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