HEATING & AIR CONDITIONING — 1994–1998 DODGE RAM 5.9L CUMMINS (12-VALVE, P7100)

Get your Second-Gen’s cabin back to perfect temps. CPP Diesel curates A/C compressors, accumulators & orifice tubes, blower motors & resistors, HVAC control knobs, blend/heater door actuators, and heater core lines/tubes that fit the 1994–1998 Ram 2500/3500.

Shop by Subcategory

• A/C COMPRESSORS (94–98) — direct-fit replacements and upgrades.
• ACCUMULATOR / RECEIVER-DRIER (94–02) — restores moisture control and system protection.
• ORIFICE TUBE (94–97) — correct metering for steady vent temps.
• BLOWER MOTOR (97–02) — OE Mopar fit and airflow.
• BLOWER MOTOR RESISTOR (94–02) — fan-speed restore; or resistor + pigtail kit.
• HVAC BLEND DOOR ACTUATOR (94–02) & HEATER DOOR ACTUATOR (94–02) — fixes hot/cold and mode issues.
• HVAC CONTROL KNOBS (94–97) — freshen worn controls.
• HEATER CORE LINES & TUBES (94–98) — Fleece/CPP line kits and Cummins heater tubes.
• A/C LINE ADAPTERS (SWAP) — Fummins adapter for Dodge compressor ↔ Ford lines.

Featured 94–98 Picks

• GPD 6511617 A/C Compressor — 1994–2005 coverage; bolt-in on 12-valves.
• GPD 1411266 Accumulator (’94–’02) — moisture control & system protection.
• GPD 3411252 Orifice Tube (’94–’97) — correct refrigerant metering.
• Dorman 973-020 Blower Resistor (’94–’02) — restores fan speeds.
• Mopar 05104879AA Blend Door Actuator (’94–’02) — fixes temp blend errors.
• Dorman 76829 HVAC Knobs (’94–’97) — clean, OE-style replacements.
• Cummins 3912087 Heater Tube (Inner) — OE 1989–1998 5.9L routing.

Why Buy from CPP Diesel

• Second-Gen Focus: Catalog tuned for 1994–1998 trucks, with many 94–02 carryover HVAC parts.
• OE + Aftermarket: Mopar, GPD, Dorman, Cummins, Fleece & CPP solutions in one place.
• Expert Support: Proper part matching (year breaks, single/dual zone variants), resistor/actuator diagnostics, and best-practice install tips.
• Fast Shipping: Popular HVAC components ship quickly from U.S. warehouses.

Explore the full 1994–1998 Cummins catalog and, for cold-weather starts, see our block heater & grid heater options.

Helpful Notes

• Year coverage: Many HVAC parts list 1994–2002; your 12-valve years are included—always check each product’s fitment notes.
• Replace in pairs: When swapping a compressor, replace the accumulator/drier and metering device (orifice tube), then evacuate and recharge to spec.
• Fan speeds dead? A failed resistor or overheated connector is common—use the resistor with pigtail when needed.
• Blend vs heater door: Temperature complaints often trace to the blend actuator; mode issues (defrost/floor) point to the heater door.
• Heater lines/tubes: Aging hard lines and molded hoses cause leaks—Fleece/CPP line kits and Cummins heater tubes are direct-fit fixes.

Frequently Asked Questions

What should I replace when installing a new A/C compressor?

Best practice is a compressor + accumulator/drier + orifice tube, plus proper oil, vacuum/evacuation, and recharge. See GPD 6511617 and GPD 1411266.

My fan only works on one speed—what’s the fix?

Replace the blower motor resistor; if the connector is damaged, use the resistor + pigtail kit.

Heat or A/C blows the wrong temp—what part fails?

Usually the HVAC blend door actuator. Mode issues may be the heater door actuator.

Which small parts improve controls and “feel”?

HVAC control knobs refresh the dash, and new heater lines/tubes stop leaks that reduce heater output.

Doing a “Fummins” swap—can I keep the Dodge compressor?

Yes—use our A/C adapter to mate the Dodge compressor to Ford lines.