Is the Timer ON and
calling for heat ?
NO
12
CH OFF
CH ON
Ensure timer is set for
Central Heating ON (see
any instructions supplied
with timer)
If you don't know what you need to do
to get the boiler to light, or need help with
the system and controls, contact your
installer as soon as possible
Is the Room Thermostat
YES
(if fitted) set high enough ?
NO
Typical
examples of
external timer
Turn Room Thermostat
to maximum setting
(typical example shown)
YES
15
If the reading falls below
1.0 bar repressurise the system
as described in Maintenance
15
Error Code 118 showing
low pressure.
Is the Central Heating
System Pressure
between 1.0 and 2.5 bar ?
NO
2
1
3
0
4
bar
YES
PN-0000634