Rod Hewitt writes:

With the evening getting colder and colder, a close relative who
lives nearby rang to ask me if I knew anything about boilers.

He is renting a house and the boiler is simply not firing up. There
are various sounds - and there is gas at the cooker! - but no dice.

I have despatched him with a fan heater, which is about all I could
do as I know little or nothing about this boiler (or boilers in
general, really!).

Obviously he is getting on to the landlord but is there anything
that could be worth looking at in the interim?

I did look at the BW site - but couldn't quickly find a 240 model -
any hints there would be appreciated. Not sure of its age or
anything though it seems to be a combi.

I have this model---mine's more than 7 years old (no idea by how
much).

Do the POWER and DEMAND neons light up? Does the heating water gauge
show reasonable pressure? Does the fan motor (near the top) run?
Does the pump (near bottom left) run?

The easiest thing to check internally is that the overheat thermostat
hasn't triggered (try pressing the reset button about two inches
behind the centre bottom of the front cover---lift up cover to
remove).

I have the handbooks, but most of the startup diagnostic charts
involve measuring voltages.

--
Mark