Diagnostic tool that connects directly to your RV refrigerator’s lower control module to test all operating modes without removing the circuit board from the unit. The tester cycles through AC, DC, and gas functions independently, helping isolate whether heating and control failures stem from the circuit board, sensor, or other components.

This approach eliminates repeated trips between the driver’s seat and interior, and allows technicians to diagnose component faults systematically through process of elimination.

• Tests AC, DC, and gas refrigerator functions
• Plugs into lower control module while installed
• Helps diagnose faulty sensors and thermistors
• Compatible with Dometic refrigerators
• Reduces troubleshooting time on three-way models