Dometic 3 + 8 flashing + 20 s beep fault code — Refrigerator

Applies to: RM8xxx, RMS8xxx, RML8xxx, RMSL8xxx, RM8501, RM8505, RMS8501, RMS8505, RML8555, RMSL8505

What 3 + 8 flashing + 20 s beep means

The RM8/RMS8/RML8/RMSL8 operating manual lists 3 + 8 flashing + 20 s beep as: GAS or automatic mode did not ignite the flame.

Owner-safe checks

• Confirm the LP cylinder has fuel from owner-visible indicators.
• Use the front GAS FAULT reset only after correcting an owner-visible supply issue.
• Stop LP mode and arrange service if the display returns.

Service-only work

• Repeated LP ignition failure, burner service, LP hardware, 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

• Dometic RM8xxx, RMS8xxx, RML8xxx, RMSL8xxx Absorber Refrigerator Operating Manual

Related symptom guides

• RV refrigerator or gas appliance will not ignite on LP
• Dometic legacy absorption refrigerator display faults
• Pre-service checklist for RV appliance calls

Other Dometic Refrigerator codes

• Dometic E0
• Dometic E1
• Dometic E2
• Dometic E3
• Dometic E4
• Dometic 01
• Dometic 03
• Dometic 05

All Dometic codes and guides