Baxi Combi 130 HE Installation And Servicing Instructions page 52

Gas Valve Fault
230V at A
during ignition ?
YES
230Vdc at B
during ignition ?
NO
Boiler providing heat ?
YES
Replace Main PCB.
52
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NO
Replace Main PCB.
NO
Lead from Main PCB to
Gas Valve faulty.
NO
Replace Gas Valve.
15.0 Fault Finding
Mains Input
Burner On
&
Fault Neons
Pump
Diverter Valve
A
Gas Valve
Modem PCB
Room Thermostat
Gas Valve Plug
(when unplugged)
B
Transformer
Flow &
Return
Thermistors
Overheat
Thermostats
&
Flow Switches
&
Condensate Trap
Room Control
Display PCB
Fan