In article ,
Roger Mills wrote:
It might encourage him to do likewise and rely on the monitor rather
than having the boiler serviced.

Only if the boiler isn't room sealed - and it seems his is.


You can still get CO from a room-sealed boiler if the casing seals are
not intact.

You can get an explosion if you have a gas leak too.
Don't use any boiler with faults.

--
*I don't suffer from insanity, I enjoy every minute of it *

Dave Plowman London SW
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