Norcold 4 fault code — Refrigerator
Applies to: N3000 series, N3080, N3090, N3100, N3104, N3108, N3112, N3115, N3145, N3150, N3175
What 4 means
The official Thetford N3000 troubleshooting sheet lists error code 4 as: DC heater is off when it should be on.
Owner-safe checks
- Record the exact display wording and whether an audible alarm is present.
- Turn the refrigerator off if cooling is interrupted or the fault repeats.
- Move perishables if temperature is unsafe.
Service-only work
- DC heater, power board, and refrigerator electrical diagnosis should be handled by qualified service.
Safety boundary
Do not hand-light, clean burner parts, adjust LP gas, bypass refrigerator controls, or open electrical compartments. Shut off LP if gas odor is present and arrange qualified Norcold service for unresolved faults.