VT880 HVAC Diagram? Trying to get A/C working

Discussion in 'Volvo Forum' started by Joeziah, May 13, 2022.

  1. Joeziah

    Joeziah Light Load Member

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    Jan 2, 2016
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    Long story short. Engine swapped a 1999 Cat 3406E into the truck.

    My understanding is that the ECM on the old D16 controlled the A/C Compressor, fan over-ride and took the inputs from the high/low sides and transmitted that to my climate controller in the cab.

    I wonder if there is a direct output from the Climate controller and direct inputs I could direct wire the sensors, compressor clutch relay and fan over-ride relay directly to the Controller?

    Does the cummins version have a different control scheme?

    I would love to just take this to a shop and pay to have this done quickly, nobody I call will even look at it, so I have to try and troubleshoot it myself....

    Any ideas on what to do?
     
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  3. nasriza

    nasriza Road Train Member

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    Run an old school thermostat in the evaporator and run ac compressor power thru there run constant ground to compressor.
     
  4. nasriza

    nasriza Road Train Member

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    Found you a place that can get it done give me a call when you have a chance.
     
  5. Joeziah

    Joeziah Light Load Member

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    Jan 2, 2016
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    Awesome, I'll call you on Monday and chat about it.
     
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