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Sleeper Heating unit

Discussion in 'Trucks [ Eighteen Wheelers ]' started by bryan723, Jan 30, 2008.

  1. Jan 30, 2008 #1
    bryan723

    bryan723 Bobtail Member

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    I just bought a 1998 freightliner fld120 and under the mattress is what looks like some sore of heating unit. All it says on the top of the plastic cover is Behr Inc. So was wondering if anyone has something like this in their truck, and how is it suppose to work? It has some pipe running out the bottome of the sleeper up to the engine and has a couple blowers on it. I don't know if it works or not cause haven't been able to figure out what it exactly is.
     
    bryan723, Jan 30, 2008
    bryan723, Jan 30, 2008
    #1
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  3. Jan 30, 2008 #2
    bullhaulerswife

    bullhaulerswife Forum Leader/Admin Staff Member Administrator

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    I believe its your bunk heater, the controls for it should be in the right corner of the sleeper above the bed. Hubby has one in his as well, but it doesn't work either. Ours is a 2001, not sure the difference between the two years, but I'd bet money that its the bunk heater. :biggrin_25519:
     
    bullhaulerswife, Jan 30, 2008
    bullhaulerswife, Jan 30, 2008
    #2
  4. Jan 30, 2008 #3
    MedicineMan

    MedicineMan Road Train Member

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    it could be a webasto unit too. is there a knob on the panel that says webasto? take pics.
    if it is your bunk heat and ac it will have two heater hoses going to it and two ac lines, a squirel cage type fan and ductwork going u to the ouput ducts. I'v never looked at a freightliner bunk hvac unit. there is seerate units for the cab and the bunk though
     
    MedicineMan, Jan 30, 2008
    MedicineMan, Jan 30, 2008
    #3
  5. Feb 1, 2008 #4
    bryan723

    bryan723 Bobtail Member

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    Here is a picture of that unit I was talking about.
     

    Attached Files:

    bryan723, Feb 1, 2008
    bryan723, Feb 1, 2008
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  7. Feb 1, 2008 #5
    25(2)+2

    25(2)+2 Trucker Forum STAFF Staff Member

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    That is the HVAC unit for the bunk, most of the trucks I have driven that had them worked. The heater usually works without problems unless the fan has quit. The AC unit might not work, AC requires fixing from time to time.

    The unit is always on the right side of the truck. The Rigmaster unit is usually put in the center compartment under the bunk, they run the refrigerant hoses up through the floor. Larger inverters are usually located under the bunk as well, they can be in either place and require heavy cables to the batteries to work.
     
    25(2)+2, Feb 1, 2008
    25(2)+2, Feb 1, 2008
    #5
  8. Feb 2, 2008 #6
    bryan723

    bryan723 Bobtail Member

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    Does that unit run off the a/c pump on the motor or does it have its own? And does the truck have to be running for it to work?
     
    bryan723, Feb 2, 2008
    bryan723, Feb 2, 2008
    #6
  9. Feb 2, 2008 #7
    MedicineMan

    MedicineMan Road Train Member

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    it's the same as the unit under the dash. yes the truck has to be running and usually it is a slave unit so the unit up front must be on for it to work, at least with the ac. It shares the same ac system as the front unit and the heater has hoses running to it from the motor. usually the hoses run from the motor to the front unit, out of the front unit back to the bunk unit, out of the bunk unit and back to the motor.
    Have you ever driven a truck before?
     
    MedicineMan, Feb 2, 2008
    MedicineMan, Feb 2, 2008
    #7
  10. Aug 11, 2010 #8
    tesla4all

    tesla4all Light Load Member

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    That's just the standard heating/cooling unit for your bunk
     
    tesla4all, Aug 11, 2010
    tesla4all, Aug 11, 2010
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