protherm 80 boiler
intermittent fault on hot water, sometimes fires up fine and sometimes doesn't fire up when a hot tap opened. also same problem when boiler on for central heating; sometimes hot water, sometimes not. pressure ok. dhw microswitch ok. diverter diaphram ok.
any ideas

bill cox, January 2008

This is a question as you seem to know what you are talking about.

How do you check the DHW m/switch and also the diverter diaphgram (ie where are they)

I know it is of little help to you but it will help me!

Thanks,

Bryce, April 2008