TQ DGH FC4, FC19 - FC4 Thermistor > 70 deg C during run, FC10 HX OT1 opened, FC19 HX OT2 opened

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Fault code history can be accessed:

SETTINGS/SERVICE/GAS HEATER 01/7378 CONT/FAULT LOG


YouTube Video - MagIQtouch Heater Fault Log 


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