Hi
I have a Worcester 24SiII combi boiler. Hot water (HW) has been working fine all summer. Turned the Central Heating (CH) on last night - radiators warmed up, but Lockout light flashing on panel. Turned it off immediately. I read the manual in bed last night (yawn), and this morning reset the lockout, but now I get lockout for both HW and CH
The boiler fires up OK, and runs for a minute or two. Hot tap water or hot radiators, but then the flame dies. The boilers tries to relight (the electrodes spark), but no gas. Then there is a lockout alarm - flashing 4 times per second.
I have been through the fault finding stuff in the manual, and everything seems to check out:
HW/CH temperature sensors in place, not open circuit, correct resistance
Air pressure switch OK (including condensation in pipes)
Vent fan runs. Flue not blocked
CH pump runs OK
The only thing I've noticed is that the hot water seems hotter than normal. If the gas valve isn't modulating properly, could it cause these symptoms? When in CH mode, the flame intensity ramps up as described in the manual, so I don't know. Any ideas - hopefully not a new board!!
Thanks
Jim
I have a Worcester 24SiII combi boiler. Hot water (HW) has been working fine all summer. Turned the Central Heating (CH) on last night - radiators warmed up, but Lockout light flashing on panel. Turned it off immediately. I read the manual in bed last night (yawn), and this morning reset the lockout, but now I get lockout for both HW and CH
The boiler fires up OK, and runs for a minute or two. Hot tap water or hot radiators, but then the flame dies. The boilers tries to relight (the electrodes spark), but no gas. Then there is a lockout alarm - flashing 4 times per second.
I have been through the fault finding stuff in the manual, and everything seems to check out:
HW/CH temperature sensors in place, not open circuit, correct resistance
Air pressure switch OK (including condensation in pipes)
Vent fan runs. Flue not blocked
CH pump runs OK
The only thing I've noticed is that the hot water seems hotter than normal. If the gas valve isn't modulating properly, could it cause these symptoms? When in CH mode, the flame intensity ramps up as described in the manual, so I don't know. Any ideas - hopefully not a new board!!
Thanks
Jim