Ben asked ... Toyota Yaris French or Japanese?    |    Andy asked ... How can I mend my MacAlistair 450w hedge trimmer?    |    Felix asked ... Hitachi vt-m70em?    |    Katie Bond asked ... Fixing auto threader on Baby Lock Enlighten Overlocker?    |    Chris. asked ... Miele W800 novotronic washing machine?    |    Click here to ask your question

halstead ace he 30 combi boiler?

boiler is working fine hot water and heating but goes over pressure blows off through pressure release valve. reset pressure but builds up again when in heating mode fine when just hot water.
gareth, December 2013
boiler loses pressure
frequent top ups
pressure relief valve leaking
check expansion vessel

http://www.youtube.com/watch?v=uPPUPftBI58

Q, December 2013
could be a partially blocked heat exchanger

A1, December 2013
link Click here to see other fixes for Halstead Ace.