Atwood AFM (LED-blink) error code 1 FLASH
Limit switch is open or airflow is insufficient. SOFT lockout — auto-retries.
What to check, and in what order, is in the app. The flow Atwood: Limit Switch / Airflow Problem (1-flash) 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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- Atwood/Dometic Service Manual P/N 33176 (revs A-D+) - myrvworks.com + technicianhq.com
- Atwood AFMD Installation & Service Manual - dometic.com/en-us/support
- Dometic Service (RV) 1-574-294-2511 (Elkhart IN)
- Atwood AFM LED diagnostic patterns (1F limit/airflow, 2F flame sense, 3F ignition, steady = board internal failure) - documented in Atwood Service Manual 33176 §LED Diagnostic Indications
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