For 99-01 Ram 1500 99-02 Ram 2500 3500 5012923AB Temperature Door Servo Coupling

Temperature Door Servo Coupling for Ram 1500, 2500, 3500

This temperature door servo coupling replaces the 5012923AB actuator arm on select Dodge Ram pickup trucks, restoring proper blend door movement for accurate cabin temperature control.

Overview

This temperature door servo coupling is a direct replacement for the factory actuator linkage on 1999-2001 Ram 1500 and 1999-2002 Ram 2500/3500 trucks. It transfers motion from the servo motor to the temperature door, ensuring the HVAC system responds correctly to dial settings. Worn or broken couplings cause clicking noises, limited heat or AC output, and erratic temperature swings.

Built For Performance

• Reinforced nylon construction resists cracking from repeated actuator cycling
• Snap-fit design installs without special tools in minutes
• OEM cross-reference 5012923AB ensures direct dimensional matching
• Steel insert prevents spline stripping on the servo shaft
• Integral stop tabs hold the door in full hot and cold positions

Fits These Machines

• for 1999-2001 Dodge Ram 1500
• for 1999-2002 Dodge Ram 2500
• for 1999-2002 Dodge Ram 3500

On-The-Job Use

• Replacing a worn coupling that causes heater core flow to be stuck on defrost
• Fixing intermittent AC compressor cycling tied to blend door feedback
• Repairing a passenger-side temperature flap that rattles or fails to close fully
• Restoring proper temperature mixing during long highway drives

Specs At A Glance

Good To Know

Q: How do I know if my servo coupling is broken? A: A clicking or grinding sound from behind the dashboard, especially when changing temperature settings, indicates the coupling has stripped. The HVAC may also blow only hot or only cold regardless of dial position.

Q: Can I replace this without removing the entire dashboard? A: Yes, on most Ram models the coupling is accessible from the driver's footwell or through the glove box opening after removing a small cover panel. Use a mirror and flashlight to see the servo arm clearly.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.