Comments on: Combi boiler pressure drops below 0 overnight and rises over 3 when on?

By: Danna Nicholas

Danna Nicholas — Sat, 26 May 2007 11:41:33 +0000

sounds like your setting are wrong and it may have a 24 hour clock that needs adjusting

By: Mateo Stone

Mateo Stone — Fri, 25 May 2007 11:19:13 +0000

I agree, the bladder is either split or needs pressure again. The heated water has nowhere to expand to and is leaking from the relief valve.

By: Laney Dutton

Laney Dutton — Tue, 22 May 2007 03:54:12 +0000

probably the expansion vessel.theres a rubber bladder inside this has broken, you need it looked at by a corgi engineer, other wise you ll need a new press relief valve as well as expansion vess, take a look out side to see if the prv(pressure relief valve) is letting buy,you may see water dripping or running. easy to fix but expensive

By: Oscar Cooper

Oscar Cooper — Sat, 19 May 2007 07:03:18 +0000

Did you check the water temp? this should be adjustable and may be too low,

By: Theresa5

Theresa5 — Thu, 17 May 2007 22:25:11 +0000

I would say you have got a leak somewhere.

By: Madeline Whyte

Madeline Whyte — Thu, 17 May 2007 19:57:43 +0000

pump settings need changing

By: Rebecca Slater

Rebecca Slater — Mon, 14 May 2007 19:49:58 +0000

Sounds like a fault with your pressure relief valve. this allows excess pressure to be relieved from the system and should be on the inlet side of the boiler, at least it is on mine, when you refill see at what pressure it lifts. If this is normal it may be the valve seat or the rubber. If not then you have a leak somewhere.