Dometic external-to-internal power switching failure fault code — Refrigerator
Applies to: RMD8501, RMD8551, RMD8xx1
What external-to-internal power switching failure means
The RMD8 operating manual lists external-to-internal power switching failure as: automatic change-over from external to internal power supply does not function, so the refrigerator does not work and gas mode is not possible even though batteries are inserted.
Owner-safe checks
- Switch the refrigerator off and on once as the manual describes.
- Record whether vehicle power was disconnected while gas mode was starting.
Service-only work
- Power switchover, internal supply, and refrigerator electronics diagnosis are service-only.
Safety boundary
Do not open gas, electrical, or cooling-system components; use only documented front-panel actions and call qualified RV service for repeated faults.
Official sources
Related symptom guides
- RV appliance low-voltage warning
- RV refrigerator or gas appliance will not ignite on LP
- Dometic legacy absorption refrigerator display faults
- Pre-service checklist for RV appliance calls