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Baxi Baxi 600/800/Assure System 2 and 600 Combi 2 platform fault codes

41 codes from the Baxi manual for the Baxi 600/800/Assure System 2 and 600 Combi 2 platform gas boiler. Pick one for what it means, the likely causes and where to start.

CodeWhat it means
A.02.06Low water pressure
AC004Failed start-up attempts after last maintenance
DC004Number of burner start-ups for DHW mode
DC005Number of burner start-up hours for DHW mode
E.01.04Flame loss detected five times in 24 hours
E.01.12Return sensor temperature greater than flow temperature
E.01.17No water circulation (permanent)
E.01.20Maximum flue gas temperature reached
E.04.08Maximum safe temperature value reached
E.04.09Difference between flue gas sensors 1 and 2 temperature values
E.04.10Burner failed to ignite after 4 attempts
E.04.11VPS gas valve test failed
E.04.12Ignition failure for monitoring parasitic flame
E.04.14Temperature difference between set point and burner exceeds 60s vs GVC configuration
E.04.15Flue gas exhaust pipe blocked
E.04.23Gas valve check valve internal stoppage
E.04.24Gas family not detected during automatic detection function
E.04.54Fault in gas valve control circuit
GC007Failed start-up attempts
GM044-10Heating flow temperature above the shutdown value
GM044-12Shutdown caused by flame value being too low
GM044-3Awaiting burner ignition
GM044-4Heating flow temperature above maximum value
GM044-5Heating flow temperature above the starting value
GM044-7Average heating flow temperature value above the starting value
GM044-8Heating flow temperature above the setpoint value
GM044-9Temperature difference between flow and return too great
H.00.42Pressure sensor open/faulty
H.01.05Maximum temperature difference value between flow and return reached
H.01.08Flow temperature increase in heating mode too quick
H.01.18No water circulation (temporary)
H.01.21Flow temperature increase in domestic water mode too quick
H.02.04PCB settings cannot be read
H.02.09Partial stoppage of the boiler
H.02.10Complete stoppage of the boiler
H.03.02Temporary flame loss
H.03.54Temporary flame loss / shutdown due to low power supply voltage
PC002Number of burner start-ups for heating and DHW mode
PC003Number of burner start-up hours for heating and DHW mode
PC004Burner flame leaks
SVCMaintenance required message