Baxi Combi 130 HE Installation & Servicing Instructions Manual page 52

Flow Temperature Overheat Lockout (Ld) or
Fan Temperature Overheat Lockout (LE)
Display flashing Ld ?
YES
Disconnect
black stat on flow pipe.
When flow < 60° C, is there
continuity across stat ?
YES
Reconnect
stat. Disconnect 9-way
PCB connector. Is there
continuity across T ?
YES
Replace PCB.
52
NO
Replace stat.
NO
Wiring from PCB to
thermostats faulty.
T
U
15.0 Fault Finding
Display flashing LE ?
YES
Disconnect
Fan Stat.
When Fan temperature < 60° C,
is there continuity
across stat ?
YES
Reconnect
stat. Disconnect 9-way
PCB connector. Is there
continuity across U ?
YES
Are Boot
Lace seals holding door
away from heat
exchanger ?
YES
Trim seals back.
Replace door seals if
damaged.
NO
Replace stat.
NO
Wiring from PCB to
thermostats faulty.
NO
Replace PCB.