2010 Freightliner Columbia - Blower working but very little heat anywhere

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by bvanzalen, Dec 4, 2023.

  1. bvanzalen

    bvanzalen Bobtail Member

    11
    4
    Feb 2, 2021
    0
    Good morning guys,
    I changed the cabin filter, which was packed with crap, but still very little air movement no matter where I select on the dial. Any tips? Is there a fuse that's part of this system or is it an actuator? TIA
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. uncleal13

    uncleal13 Road Train Member

    3,731
    6,125
    Apr 9, 2009
    Humboldt, Sk
    0
    Are you able to redirect the air flow to the various positions. Windshield, floor, dash ports.
    There are electrical actuators under the dash that control the doors that redirect the air flow. On earlier models they were air operated, the anchor ends of the actuators were mounted to plastic that would break and you would lose control of the blend doors.
    If the cabin air filter was that bad, I have seen the heater cores get plugged with debris. Maybe take the filter back out and try to get a look down stream towards the core.
    Does the truck have heater hoses with shut off valves under the hood. Just follow the lines from the heater core to the engine and watch for a valve that maybe be fully or partially closed.
     
  4. bvanzalen

    bvanzalen Bobtail Member

    11
    4
    Feb 2, 2021
    0
    Not able to direct airflow at all. No flow no matter what position I set the knob to. Valves on heater hoses are open. Good point on the heater core. I'll try and check it. Wish there was a YouTube video on checking the actuators. Seems like I'd have to take the whole top of the dash off. Thanks uncleal13.
     
  5. JB7

    JB7 Medium Load Member

    497
    597
    Dec 13, 2022
    0
    This video is for a Columbia.
    (1) Freightliner HVAC blower motor. troubleshooting, diagnosis, repair - YouTube
    upload_2023-12-4_13-38-58.png

    1- is an air filter but there should be the one for outside air. The one you probably changed.
    2 - is the heater core
    3 - remove those screws to see what is behind there. Likely the blend door.
    4 - this looks like a servo motor to operate the HVAC blend/direction door

    Note the thumbs up/thanks icon near reply.
     
    bvanzalen Thanks this.
  6. bvanzalen

    bvanzalen Bobtail Member

    11
    4
    Feb 2, 2021
    0
    Excellent. Thanks JB7!
     
  7. BoxCarKidd

    BoxCarKidd Road Train Member

    4,162
    5,972
    Aug 26, 2014
    0
    Columbia's have been gone for a while also. But if you take the panels off in front of the passenger seat is the blower motor not at the bottom? Take it out. Is the fan spinning on the shaft? Look in there At the core. Is it stopped up with corn dust, dog hair or rat stuff.
    Wash and blow all that out as best you can while you are there. Even if that is not your problem. Then go looking for duct doors problems.
     
    bvanzalen Thanks this.
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  • Draft saved Draft deleted