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yeah, I probably am, but I just dont want to call someone out when its just something daft. plus I am new to this kind of thing so im trying to find out as much as possible. Sorry to keep being a pain, but I have a few pipes going to the boiler, 2 of these have an on/off valve on them...

Thanks for your reply, I have been looking online for a manual and I found a technical spec here : http://www.worcester-bosch.co.uk/homeowner/products/lpg-fired-boilers-and-systems/greenstar-30si/literature Way down on p.27 it talks about the cold water pressure operating at 0.2, does this...

sorry, the model number is actually the 30si told you I was a novice ;-)

Hi, I have recently moved into a house with the above mentioned combi boiler. My central heating and hot water all seem to run as expected, but I have recently noticed that when my central heating is off that my pressure gauge is at 0! When I turn the heating on it goes to about 1.25. Is...