On Oct 5, 10:53 am, "thankyousam" wrote:
Iknownothing wrote:

NewbieDo you have a room thermostat somewhere? It sounds like that could be
broken meaning that the boiler is never "switched" on - apart from via
the override switch .

The override switch overrides the timer, not the thermostat. If the
thermostat isn't calling for heat then the you will get no heat even
with the override. It's more likely a problem with the timer.

MBQ