Air leak under dash in 93 Freightlliner

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Rick Wilmath, Aug 19, 2017.

  1. Aug 19, 2017 #1
    Rick Wilmath

    Rick Wilmath Light Load Member

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    May 15, 2016
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    I have a peculiar air leak under the dash in my 93 Freightliner. It is a very small leak and just barely audible. On the day this happened it quit leaking after a few hours. I don't know if it was from the truck warming up.

    When I pulled the cover off the dash I couldn't see where it is coming from but stuck my hand down and found it. It is back a few inches from the dash panel and down a few inches from the brake controls. It doesn't seem to be a coming from a major hose or valve. Could this be part of the ac/heat system?

    How much do I need to disassemble to get to it?

    Any ideas?

    Thanks
     
    Rick Wilmath, Aug 19, 2017
    Rick Wilmath, Aug 19, 2017
    #1
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  3. Aug 19, 2017 #2
    Ristow

    Ristow Road Train Member

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    Jun 28, 2014
    Fema Region 5
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    Yeah the heater control panel can leak on these. Also the little air sokenods for the various vents and ducts. See if the leak changes as you go thru the control ranges.

    Also the air wiper controls if yours is air.
     
    Ristow, Aug 19, 2017
    Ristow, Aug 19, 2017
    #2
    Rick Wilmath Thanks this.
  4. Sep 4, 2017 #3
    Rick Wilmath

    Rick Wilmath Light Load Member

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    May 15, 2016
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    It was the heater controls, thanks
     
    Rick Wilmath, Sep 4, 2017
    Rick Wilmath, Sep 4, 2017
    #3
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