I have an Ideal classic bolier, which has just been serviced. and no problems found. However since then I have noticed that it keeps turning itself on, even though the timers are set to off !!! This is very strange, and at first thought it was some kind of frost protection, but it has not been that cold. It does this at all times of the day.
Im thinking maybe the electroncics have got screwed up somehow.. any ideas would be appreciated

Robs, October 2006

it will almost certainly be the 3 port valve stuck if its a sunvic or satchwell one.

MIKE, October 2006

ours does this intermittently found that the overheat stat button had tripped reset it and seems to be fine . is the ignition still working ?if this is intermittent it can be a chaffed cable, hope this helps

babs, October 2006