"Arthur 51" wrote in message
...
Hi.
I have a W-Bosch 28i which worked ok until 4pm yesterday.
Then then it stopped firing up when running the hot water. And nothing at
the rads.

I can't see any pilot flame inside.

The only clue is when we discovered the problem I noticed that the water
pressure had
gone well below 1 bar.

Whats the usual cause of such a sudden failure?

Thanks.

Arthur


Is the pressure drop sudden - when did you last check it? When did it last
need adjusting?