While you wait for answers, we may have found some information which could help you.
Success
Message
central heating?
Hot water issue?
domestic hot water works but the heating shuts down?
hot water?
electric cutout?
Water goes hot then cold when running tap?
ignition lock out comes on ?
my rads are hot at top and cold at bottom how can i fix them ?
can i still have my central heating on while i have water leak?
high pressure on halsetad ace he 24?
timer ?
Heating wont turn off?