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  • DODGE CUMMINS
  • FORD POWERSTROKE
  • GM DURAMAX
  • COMMERCIAL / INDUSTRIAL
  • CUMMINS CONVERSION PARTS
  • CPP GEAR
  • USED PARTS
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    • HEATING AND AIR CONDITIONING

    HEATING AND AIR CONDITIONING — 1998.5–2002 DODGE RAM 5.9L CUMMINS (24-VALVE, VP44)

    Bring your late 2nd-Gen’s HVAC back to factory comfort. CPP Diesel stocks blower motors, resistors & pigtails, blend/heater door actuators, and A/C hard parts (compressors, accumulators, lines, orifice tubes) selected to fit the 1998.5–2002 Ram 2500/3500 5.9L 24-valve.

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    Featured 98.5–02 Picks

    Why Buy from CPP Diesel

    • 2nd-Gen Focus: Parts vetted on 1998.5–2002 Rams for fitment and wiring/connectors.
    • Top Brands + CPP: Mopar & Dorman replacements, GPD A/C hardware, plus CPP-branded solutions.
    • One-Cart Refresh: From blower circuits to A/C hard parts, everything needed for a reliable fix.
    • Fast Shipping: Popular HVAC items ship quickly from U.S. warehouses.

    Also see COOLING SYSTEM for coolant-side service parts and HEAT CONTROL PRODUCTS to manage under-hood temps.

    Helpful Notes

    • No/limited fan speeds: Replace the resistor (and pigtail if overheated) before condemning the motor.
    • Only hot or only cold air: Diagnose/replace the blend door actuator (98.5–02 main: Dorman 604-018).
    • Compressor swap: Always install a new accumulator/drier and verify orifice/expansion component & oil charge.
    • Heater leaks/odor: Inspect heater core tubes/hoses and fittings—use the molded CPP tube assembly for clean repairs.

    Frequently Asked Questions

    My fan only works on high—what should I replace?

    Start with the blower resistor (973-020). If the connector is heat-damaged, use the 973-421 kit.

    How do I fix “stuck on hot” or wrong vent mode?

    Replace the blend/heater door actuator—see Dorman 604-018 (main) or Mopar 05104879AA.

    What should I replace with a new A/C compressor?

    Install a fresh accumulator, verify the orifice/expansion component, and add the correct oil/refrigerant by spec.

    Do you carry the heater core tube/hose for late 2nd-Gen?

    Yes—our molded CPP Heater Core Tube Assembly is a direct-fit solution.

    Where can I find all HVAC parts for 98.5–02 in one place?

    Browse the dedicated HEATING AND AIR CONDITIONING (98.5–02) category for the full lineup.

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