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Volvo 2016 Front Cab Blower Problems

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Wildflower71, May 19, 2020.

  1. May 19, 2020 #1
    Wildflower71

    Wildflower71 Bobtail Member

    2
    0
    May 19, 2020
    Mississippi
    0
    I’ve read through old forums until I am blue! Please help diagnose the real problem. We have a 2016 Volvo VNL780. Our blower stopped working today.
    Here‘s what we know:
    1.Knob will not change the speed of air flowing through the vents.
    2.When truck is moving: Air comes through vents when button is pushed to let outside air through. 3.Air coming through vents is cool.
    4.Sleeper Vents are working fine.

    Question: is this the fan motor, the resistor, sensor, a fuse, or something else? Like everyone else, we don’t want to fix something that isn’t messed up! Thank you in advance for your input.
     
    Wildflower71, May 19, 2020
    Wildflower71, May 19, 2020
    #1
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  3. May 20, 2020 #2
    boneebone

    boneebone Road Train Member

    2,232
    2,266
    Mar 13, 2009
    0
    First of all you need to test the fan motor itself by putting direct power to the fan leads to determine if the fan works or doesn’t.

    if the fan works, it’s most likely the fan speed switch.

    If the fan doesn’t work, after jumping it, replace the fan motor.
     
    boneebone, May 20, 2020
    boneebone, May 20, 2020
    #2
  4. Oct 27, 2021 #3
    banku

    banku Bobtail Member

    7
    2
    Dec 12, 2012
    0

    Hi
    Sorry to disturb. But did you get the issue resolved and how?
    I am facing the same on my Volvo FM460 "66 plate '
    The error code shown in Diagnostics in DTCs under CCM is U114188.
    Thanks
     
    banku, Oct 27, 2021
    banku, Oct 27, 2021
    #3
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