had a corgi reg plumber have a look at my bolier does,nt know whats wrong. my c h pump is on all the time when c h is selected. the only time it stops is if i turn a hot water tap on then comes back on after 15 secs it runs 24 hrs a day even when the prorammer goes off the only way i can stop it is to turn on a hot water tap. can sombody help? thanks, colin.

colin hasler, September 2008

yes the reason is your cobi boiler will only give you heating or hot water sounds like your pcb or printe circut board is falty

dann, July 2009

sounds like flow switch needs replacing. may as well do both as are cheap

lee, October 2008