Glowworm 30 Ci Combi Boiler

[mattcrob]

Can someone give me some advice please?

Boiler has been steadily losing pressure, we keep topping it up but whilst doing this water leaks out of the LH side (not sure where).

When the heating is on all is fine, as soon as it is turned off the pressure continues to drop until it switches itself off.

Also we have a constant drip on the outside of the house where the overflow pipe is.

As you can tell from my lack of technical jargon, i haven't got a clue

 

[Eyebrowes80]

Sounds like a leaking pressure relief valve

 

[toasty]

....or a failed pressure vessel? This should be in heating and plumbing surely? You'll get more interest there

 

[AVM]

sounds like u need a automatic bypass valve to let hot water through heat exchanger wen u shut down the heating or turn down trv,s