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2014 cascadia Fan always on

Discussion in 'Trucks [ Eighteen Wheelers ]' started by 77fib77, Feb 13, 2017.

  1. Feb 13, 2017 #1
    77fib77

    77fib77 Road Train Member

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    So im driving a cascadia first day and the fan never kicks off. Is it normal? It's only bobtailing today. Could thermostat be broken?
     
    77fib77, Feb 13, 2017
    77fib77, Feb 13, 2017
    #1
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  3. Feb 13, 2017 #2
    fargonaz

    fargonaz Road Train Member

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    There could be 3 things that turn the fan on, a/c pressure switch(all trucks with a/c), engine coolant temp (usually cut in at 215-220 out at 205) and a fan switch in the cabin.

    Do you notice if you are loosing secondary air pressure? It could be the seals are bad in the fan clutch.
     
    fargonaz, Feb 13, 2017
    fargonaz, Feb 13, 2017
    #2
    77fib77 Thanks this.
  4. Feb 13, 2017 #3
    77fib77

    77fib77 Road Train Member

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    Engine temp is 180 to 200 and it's running. I wonder if new design of better fuel economy is to keep it in that range? It's a dd15. I don't see a fan switch in cabin.

    I did notice secondary tank was Lower than primary.
     
    77fib77, Feb 13, 2017
    77fib77, Feb 13, 2017
    #3
  5. Feb 13, 2017 #4
    fargonaz

    fargonaz Road Train Member

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    If the seals in the fan clutch are bad the regulator will be popping quite a bit more often, as it uses air to release the clutch.
     
    fargonaz, Feb 13, 2017
    fargonaz, Feb 13, 2017
    #4
  7. Feb 14, 2017 #5
    TruckerPete1990

    TruckerPete1990 Road Train Member

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    After fan always on hurts mpg :p
     
    TruckerPete1990, Feb 14, 2017
    TruckerPete1990, Feb 14, 2017
    #5
    fargonaz Thanks this.
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