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