Just to check - I have a system boiler which provides central heating and
heats a hot water cylinder.

The programmer is off and there seems to be no power to the boiler (problems
with downstairs lighting circuit).

So does all the power to the system flow from one connection i.e. the boiler
takes its power directly from the programmer or are the two independantly
powered?

If it is all one feed then I can find where the power goes in and connect in
temporarily from a ring main to get the CH working.

If the boiler and programmer are powered independantly (and both off the
downstairs lighting circuit) then that is more of a challenge.

I am assuming the pump is either powered off the same circuit or off a
seperate 13 amp feed.
Either way I might be able to make a temporary repair.

Moral - even if it is broke don't try to fix it.

--
No plan survives contact with the enemy.
[Not even bunny]

Helmuth von Moltke the Elder

(\__/)
(='.'=)
(")_(")