New expansion vessel but stll not right...

[miranda]

Hi everyone,

last month I got a plumber in for my Icon combi boiler (made by Glowworm apparently). It was depressurizing every few days and when the heating came on the pressure would immediately jump to around 3 bar. My plumber said it needed a new expansion vessel which cost £350 as the boiler had to come off the wall (there was nowhere to put it outside the boiler). Now done I still have some problems and am wondering if the guy knew what he was doing and whether to get him back!

Problems are:
-hot water not very hot, even when turned up to the max
-pressure still jumps by about half a bar as soon as the heating comes on
-still losing pressure and needing to be refilled about once a week
-sporadically very noisy (usual boiler type noise plus a watery noise)

Any ideas what the problem is/what he's done/if I should get him back?

thanks,
Miranda

 

[compheat]

Problems are:
-hot water not very hot, even when turned up to the max
-pressure still jumps by about half a bar as soon as the heating comes on
-still losing pressure and needing to be refilled about once a week
-sporadically very noisy (usual boiler type noise plus a watery noise)

(1) check the flow of the hot water, turn it down at the boiler this should increase temp.
(2) 1/2bar is ok. Set at 1 or 1.5 then when hot goes to 2bar This is normal.
(3) Losing pressure could be a number of things wrong! leaking pipework,
leaking rad vavles, faulty PRV on boiler.
(4)The noise is due to pressure/water loss in the system.

£350 seems a bit steep!!! the expansion vessel is about £75 the rest is labour about 4hours max

 

[gasgeezer]

could be blocked dhw heat exch or even low gas pressure causing tepid hot water agree probably syst. leak 350 quid about 350 quid more than its worth boiler made by hermann italian company owned by vaillant groupto late now i would have used money towards decent boiler