While you wait for answers, we may have found some information which could help you.
Success
Message
timer ?
Water goes hot then cold when running tap?
ignition lock out comes on ?
electric cutout?
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?
Heating wont turn off?
central heating?
domestic hot water works but the heating shuts down?
hot water?
how can i remove fan?
Hot water issue?