Dometic AC plug + warning triangle flashing + 20 s beep fault code — Refrigerator
Applies to: RMD8501, RMD8505, RMD8551, RMD8555, RMD8xx1, RMD8xx5
What AC plug + warning triangle flashing + 20 s beep means
The RMD8 operating manual lists AC plug + warning triangle flashing + 20 s beep as: AC power supply is not available or insufficient.
Owner-safe checks
- Check the owner-visible AC power cable, power source, and selected energy mode.
- Record whether the fault clears after restoring the intended power source.
Service-only work
- AC supply, fuse, 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
- Dometic legacy absorption refrigerator display faults
- Pre-service checklist for RV appliance calls