RV appliance fault codes, decoded.
Your fridge, furnace, water heater, A/C, leveler or inverter just threw a code or a blink pattern. Type it in — get the meaning, the most likely causes, the safe checks to try, and exactly how to reset. Free, no signup.
- 297 codes
- From manufacturer manuals
- 27 brands
- Always free
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Recently verified
Codes we checked or rewrote most recently against manufacturer documentation — last on 2026-08-09.
Girard water heater — Ignition failure. The igniter sparked but the board never confirmed a … E3 2026-08-09
Girard water heater — The ECO — the over-temperature cut-off thermostat — opened, either bef… E6 2026-08-09
Girard water heater — Over-temperature. The outlet water temperature exceeded 60 °C (140 °F)… E8 2026-08-09
Girard water heater — Air pressure (vacuum) switch fault. The switch that confirms the blowe… E7 2026-08-09
Girard water heater — Linear valve failure. The controller detected an open circuit in the l… E9 2026-08-09
Girard water heater — Flame sensor fault, and specifically the inverted case: the board sees… En / End 2026-08-09
Girard water heater — Not a fault. This is the system timer: the board ends the burn after 2… Fault 2 (Low Oil) 2026-08-07
Onan generator — Low oil pressure — a first-level fault shown as two blinks. The Quiet …
Why RVCodeFix
Most RV fault-code answers are buried in 40-page forum threads or locked behind paywalls. We compile the factual code → meaning mapping straight from manufacturer service documentation into one clean, fast, free reference — every page with ranked causes, safe DIY checks, the reset procedure, cited sources and a clear “when to call a tech” line. 297 codes across 27 brands, and growing.