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If your boiler is not operating, it is suggested that you go
through the following simple checks before either calling your
installer or Worcester Heat Systems.
FAULT FINDER
SYMPTOM POSSIBLE CAUSE CHECK/REMEDY
Red demand There is no electricity supply
Power supply is switched on.
Indicator is not to the boiler.
Check the fuse has not blown.
illuminated.
Boiler overheat thermostat
If self resetting, allow time to reset.
has operated
If manual reset, press reset button.
(See section “Temperature Safety”.)
Demand Indicator There is no demand requiring
Check boiler thermostat is set on
illuminated only. the boiler to operate. medium to high.
Check the programmer is programmed
for hot water and/or central heating
and re-programme if necessary.
(See programmer operating instructions.)
If the boiler is programmed for
central heating, check the room
thermostat is turned on.
Demand & ‘Lockout’ The boiler has attempted
Remove the appliance front cover and
indicators both to ignite, but has gone to depress the lockout reset button
illuminated. lockout. on under side of the fascia. (See section
“Lockout”.)
Check the level in your oil tank
and replenish if necessary.
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