Glow-Worm Ultracom SXI Boiler Range Error Codes

Glow-Worm Ultracom SXI Boiler Range Error Codes Codes Description F1 Ignition fault F3 Fan unable to reach ignition speed F4 Ignition fault F5 Overheat Fault F6 Central heating flow thermistor F9 Water pressure sensor fault, blocked flow filter or pump fault F10 Central return flow thermistor F11 Main board connection fault F13 PCB memory or sensing fault F14 Gas valve control defective …

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