Can you please advise fault on dhw when hot water tap is opened boiler ignites runs for 10 secs then cuts out then ignites runs for 10 secs. Keeps doing this until hot water tap is closed, also when cental heating is running prv is leaking once pressure has built upto 2.Can anyone suggest solution to faults,thanks.

pom, April 2009

I have the same problem with the same boiler any answers?
Bob

Bobbo, September 2009