Baxi Combi 130 HE Installation And Servicing Instructions page 48

Flow Temperature Overheat Lockout
When
flow temp ≤ 60° C
thermostat open circuit ?
(measured at
thermostat)
NO
Are
Connections G open
circuit ?
NO
Is
flow temp
thermistor resistance
between 0.5kΩ and 20kΩ ?
(measured at flow
temp thermistor)
YES
Replace control PCB.
48
Supplied By www.heating spares.co Tel. 0161 620 6677
YES
Replace thermostat
(black).
YES
Wiring from Main PCB
to thermostat faulty.
NO
Replace flow
temperature thermistor
(red).
15.0 Fault Finding
Transformer
Thermistors
Mains Input
Overheat
Thermostats
Burner On
&
Flow Switches
Fault Neons
Condensate Trap
Pump
Room Control
Diverter Valve
Display PCB
Gas Valve
Modem PCB
Room Thermostat
Flow &
Return
&
&
G
Fan