Error codes › Water Heater — Tankless › Fogatti › E9

Fogatti error code E9

SafetyWater Heater — TanklessVerified against the manufacturer's manual

Proportional gas valve fault - the proportional valve is detected open during start-up or normal operation; the controller closes the solenoid valve and indicates the fault. (Fogatti 9Pro/Ultra, FS10B1S platform; on IS7/IS8 Pro this fault is reported under E7.)

What to check, and in what order, is in the app. A step-by-step flow walks this code 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 needed

Documented in

Related codes

All Water Heater — Tankless error codes · Look up another code