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Hello Daniel, He could only do that if the IASI contained a functional flow diagram. The Vipergas "Fault Finding Fan Flued Combination Boilers" is of some help but can't be definitive I'd be interested in your view as to the fault. Regards, Martin

Protherm 80e (e not E) - Client reports frequent FI that could be reset and now won't respond to reset. I've established the following: On power up the pump starts and runs sweetly for approx 1 minute. Fan won't run (steady 46 Volts a/c showing at the fan terminals) Fan winding is 57 ohms...