Recent content by Jim1758

Hi all, just to close this topic off for anyone else with a similar problem. It was the secondary heat exchanger (DHW) that was blocked - a new one cured it. I have added a Magnaclean 22mm to protect the system in the future. Job done!

Thanks for the replies so quickly. I should have said that the boiler was serviced two weeks ago as soon as the problems started and also the pipe to the expansion vessel was fairly clogged (which cured a pressure problem). It seems that all the problems seem related to build-up in the system...

Thanks for the advice. Fitted a new non-return valve under the bath and the shower / boiler has worked faultless for about a week. However for the last two days it has started doing the hot and cold cycle when showering, again!

Hi guys, A Vokera Syntesi 29e has a problem with the burner cutting out every minute for about 10 seconds, hence the water runs cold briefly. No errors on panel and pressure is fine. Could it be the domestic heat exchanger blocked? Any suggestions appreciated, thanks.