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1995 D-12 fan switch

Discussion in 'Volvo Forum' started by Repete, Jan 22, 2012.

  1. Jan 22, 2012 #1
    Repete

    Repete Bobtail Member

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    Jan 22, 2012
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    What would cause fan to be on all the time? I assume its the solenoid switch? Any help where to start thanks vin# is tn723431
     
    Repete, Jan 22, 2012
    Repete, Jan 22, 2012
    #1
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  3. Jan 22, 2012 #2
    Pablo-UA

    Pablo-UA Road Train Member

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    is it D12A/B engine? Fan was not controled with ECM
     
    Pablo-UA, Jan 22, 2012
    Pablo-UA, Jan 22, 2012
    #2
  4. Jan 22, 2012 #3
    Repete

    Repete Bobtail Member

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    Jan 22, 2012
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    Don't know where do I check?
     
    Repete, Jan 22, 2012
    Repete, Jan 22, 2012
    #3
  5. Jan 22, 2012 #4
    Pablo-UA

    Pablo-UA Road Train Member

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    As I remember D12A and D12B engines had uncontrolled fan clutch filled with silicone, ECM controled fan appeared with D12C in 1997.
    So if you have air controlled fan clutch look for temperature switch.

    Is it Wight GMC truck?
     
    Pablo-UA, Jan 22, 2012
    Pablo-UA, Jan 22, 2012
    #4
  7. Jan 23, 2012 #5
    sbaumann14

    sbaumann14 Road Train Member

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    check for air leak in air line going to fan hub
     
    sbaumann14, Jan 23, 2012
    sbaumann14, Jan 23, 2012
    #5
  8. Jan 23, 2012 #6
    Pablo-UA

    Pablo-UA Road Train Member

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    There were 50 '94 Volvo cabovers in TransPele (380 and 420 hp), and all fans were not controled, sometimes there were fan clutch bearing faults. seized bearing!!!
     
    Pablo-UA, Jan 23, 2012
    Pablo-UA, Jan 23, 2012
    #6
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