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  • DODGE CUMMINS
  • FORD POWERSTROKE
  • GM DURAMAX
  • COMMERCIAL / INDUSTRIAL
  • CUMMINS CONVERSION PARTS
  • CPP GEAR
  • USED PARTS
  • SHOP BY BRAND

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    • HEATING AND AIR CONDITIONING

    HEATING AND AIR CONDITIONING — 2007.5–2012 DODGE RAM 6.7L CUMMINS

    Restore factory comfort and defrost performance in your 6.7L Cummins. CPP Diesel stocks direct-fit A/C and heating components for 2007.5–2012 Ram 2500/3500, including compressors, condensers, evaporators, receiver driers/accumulators, heater cores, blower motors/resistors, blend door actuators, and essential seals. Every part below links to an in-stock CPP product so you can fix it right the first time.

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    Cold-Weather Starting Aids

    Fitment Notes (Read Before You Buy)

    • 2007.5–2009 trucks often use an accumulator style receiver on the low side; verify before ordering. Some line/hose part numbers differ from 2010–2012.
    • 2010–2012 refresh trucks moved to updated condensers/evaporators/valves; always match by VIN and build date (and whether you have single- or dual-zone climate control).
    • When replacing a compressor, best practice is to replace the receiver drier and metering device (expansion valve), evacuate, and charge to factory spec.

    Common Symptoms & Quick Fixes

    • No cold air at idle: Check condenser fins and fan clutch performance; a weak compressor or stuck expansion valve can also cause this.
    • Intermittent fan speeds: Usually the blower motor resistor or pigtail; inspect for heat damage and replace as a set.
    • Temp only hot or only cold on one side: Suspect a blend door actuator or miscalibrated doors after battery service.
    • Greasy residue at A/C fittings: Refrigerant oil leaks—inspect drier, lines, and compressor shaft seal; replace the leaking component and O-rings, then evacuate/recharge.
    • Fogged windshield / coolant smell: Likely a heater core seep—replace the core and refresh the HVAC case seals.

    Pro Tips from CPP

    • Purge and vacuum for minimum 30 minutes on an opened system to remove moisture; replace PAG oil per compressor manufacturer instructions.
    • Always add a new receiver drier when the system has been open to air or when replacing a compressor.
    • After actuator work, run the HVAC recalibration procedure to synchronize door travel and prevent clicking.

    Frequently Asked Questions

    Which A/C compressor should I order for my 2010 Ram 2500?

    Use the GPD 6512980 compressor and confirm your VIN/build date and clutch connector style before purchase.

    Do I need a new receiver drier when changing the compressor?

    Yes—install a fresh receiver drier (or accumulator on early 07.5–09) any time the system has been open or a compressor is replaced.

    My fan only works on high. What should I check?

    That’s a classic blower resistor failure. Inspect the pigtail and replace the Mopar 68048900AA resistor; if the motor is noisy, consider a new blower motor as well.

    Why is the passenger side hot and driver side cold?

    Likely a blend door issue. Replace the blend door actuator and run calibration.

    What else should I replace during an evaporator or heater core job?

    Plan on new HVAC case seals to prevent air leaks and odors after reassembly.

    Cold starts in winter are rough—any recommendations?

    Add the thread-in block heater & cord to improve cabin heat time and reduce engine wear in freezing temps.

    Tip: If your truck was built during a changeover period, always verify parts by VIN and climate control type (single vs. dual zone) before ordering.

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