Norcold N6XX/N8XX error code S / Sr
Flame sense circuit failure detected by the power board. Applies to N62X/N82X and N64X/N84X models. Distinct from F/no FL — this is an electronic fault in the sense circuit itself, not the burner.
What to check, and in what order, is in the app. The flow Norcold N6XX/N8XX — dc LO or dc HI fault code walks this code step by step with the pass/fail measurements, wiring schematics and procedures that go with it, and it works offline in the bay.
Start free trial 14 days free, no card neededDocumented in
- Norcold N6xx/N8xx Series Service Manual [on disk, 19-myrvworks]
- Norcold N6XX/N8XX/N1210T Service Manual
- Norcold Tech Support 800-543-1219
- Norcold Chapter 11 (Nov 2025) — parts supply uncertain past 2026
Related codes
- F / no FLBurner failed to ignite or reignite — flame sensing circuit did not…
- dc LODC voltage low — power board sees input below 10.5 VDC. Common…
- dc HIDC voltage high — power board sees input above 15.4 VDC. Most often…
- dc rEDC relay stuck closed (N64X.3/N84X.3 3-way models only). Power board…
- dc HEDC heater failed open (N64X.3/N84X.3 3-way models only). Power board…