Dometic DF Series error code 2 flashes with 3 s pause
Flame sense fault (HARD lockout) - the board is not sensing a stable flame. Requires a manual reset (thermostat or power off/on).
What to check, and in what order, is in the app. The flow Dometic DF Series furnace - LED flash code lookup 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.
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- Dometic DF Series Furnace (DFSA/DFSD/DFMD/DFLD/DFLA) Installation Manual (81452 AMER3)
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