Suburban ST42A / ST60A error code E2
False Fire Fault / Residential Fire Fault — flame signals detected before ignition start, or residual flame after shutdown
What to check, and in what order, is in the app. The flow Suburban tankless — IW60 / ST-42 / ST-60 error code + symptom diagnostic 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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- Suburban ST42A/ST60A Service Manual - ERROR CODES chartAirxcel/Suburban
- Suburban ST-42/60 Operation & Maintenance Manual P/N 206212-1 Rev 04-16-2024
- ST-series 'false fire fault' — same physical condition as IW60 E3
Related codes
- E0Outlet temperature probe fault — probe open or shorted
- E1Ignition failure — flame signal undetectable after three ignition…
- E3High limit fault — limit switch off
- E4Inlet temperature sensor fault — probe open or shorted
- E5Fan failure — no fan speed signal detected
- E6Over-temperature fault — outlet water too hot
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