Norcold 13 fault code — Refrigerator
Applies to: N3000 series, N3080, N3090, N3100, N3104, N3108, N3112, N3115, N3145, N3150, N3175
What 13 means
The official Thetford N3000 troubleshooting sheet lists error code 13 as: Thermistor fails and the control automatically switches to Backup Operation System.
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
- Thermistor, harness, and power board diagnosis should be handled by qualified Thetford/Norcold 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.
Official sources
Related symptom guides
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- RV refrigerator is not cooling
- Pre-service checklist for RV appliance calls