Dometic DF Series error code Steady on, no flashing
Internal circuit board failure (HARD lockout) - the ignition control board has failed. A hard lockout requires resetting the thermostat or cycling the power switch off then 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.
Start free trial 14 days free, no card neededDocumented in
- Dometic DF Series Furnace (DFSA/DFSD/DFMD/DFLD/DFLA) Installation Manual (81452 AMER3)
Related codes
- 1 flash with 3 s pauseLimit switch or airflow problems (SOFT lockout) - the high-temp limit…
- 2 flashes with 3 s pauseFlame sense fault (HARD lockout) - the board is not sensing a stable…
- 3 flashes with 3 s pauseIgnition lockout fault (SOFT lockout, ~1 hour retry) - the control…
- 4 flashes with 3 s pauseHigh voltage (SOFT lockout) - supply voltage is high, 16 V to 17 V.…
All Furnace (Forced-Air LP) error codes · Look up another code