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Thread: Hvac

  1. #1
    Join Date
    Dec 2006
    Florida, Orlando

    Default Hvac

    My HVAC controls are not working at all. I recently removed the fan and jumped it from my battery and it came on. I purchased a new head unit for my HVAC and still nothing. What should I look for next. I need to get it functioning again so I can use my heater controls so I can flush my coolant system.
    1995 chevy c1500, 6.5LTD 2wd, PMD relocator, SS Diesel Supply 4 inch exhuast, FS2500 Oil Bypass, & S&B Air Intake.

  2. #2
    Join Date
    Feb 2007
    Baja California Sur Mexico


    The thing that usually goes wrong, is the resistor block, there is a fuse wired in it, that can be jumped by a piece of fuse wire, no need to replace the part. There is a two wire cable with a connector, in front of the fan unit, check it, mine burned from a bad connection, giving no ground for the fan.
    Grant H.
    1995 6.5 turbo GMC K2500 extra cab 4x4 pickup, PMD under bumper, mechanical wastegate, 228,000 miles, rebuilt engine, 4.10 diff, 16 mpg
    1994 6.5 turbo GMC K2500 4x4 suburban "F" VIN #9 resistor, PMD in the bumper, mechanical waste gate, 226,000 miles, Positrac 3.73 diff, 17 mpg highway.
    1982 4x4 shortbed 6.2 Chev 260,000 miles untouched motor 17 MPG 4.27 diff. Best thing I ever owned, 21 years.

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