worcester greenstar HE

waggonway · 29 Mar 2006

My worcester greenstar HE combi seems to lose pressure after a few days of running. Having read some of the other posts I am not sure if the pressure relief valve is passing. Not a lot of evidence of leaks at the outlet. Any ideas?

corgiman · 29 Mar 2006

you may have a leak on the system, did you just replace the boiler and if so what was the original one called?

waggonway · 29 Mar 2006

The complete system was new about 4 years ago. I have checked under the floors (as best as I could downstairs) and round the rads themselves. It has been losing pressure for about 6 months and no wet patches on the ceilings from the upstairs pipework. How much water would I expect to see at the relief pipe? I am topping up about once a week from 0 to 1 on the gauge.

corgiman · 29 Mar 2006

a drip would do it

what about your pressure guage is it rising when the boiler is on and firing up

waggonway · 29 Mar 2006

Gauge rises when the water heats up. Also seem to have to bleed a couple of upstairs rad every so often. Leak in the circulation system I have not spotted?

corgiman · 29 Mar 2006

possibl expansion vessel failure

need to contact a corgi person

waggonway · 29 Mar 2006

Thanks for the help. I am under a maintenance contract with British gas, just don't like the idea of them ripping up all my floors!!! Guess I am going to have to get them out and face the mess.

corgiman · 29 Mar 2006

dont worry they probably wont have to

gasmarkone · 29 Mar 2006

Could be hydrogen formation on this old system. When you 'air out' the rads, does it have an 'odour'? I have lit it b4, but don't! Still worries me now. Youth eh!

waggonway · 29 Mar 2006

I can check this with a hydrogen detector I have at work. The system is only 4 years old. Would topping up the Dearbon help?

waggonway · 29 Mar 2006

Just had another thought. The display sometimes comes up with the message "syphon loop filling"....any connection to pressure loss?

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worcester greenstar HE

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