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depressurised (again...) pumped the valve up to 10psi, bled and pressurised again to 1 bar, heating has been running on the thermostat for the last 2 hours, and the pressure only rose to 1.2 :-) Thanks John, your a star!!

Ahhh... I've done something wrong I think.. I actually depressed that valve and let all the air out! doh! so I switch everything off, depressurise back down to zero, put some pressure back into the tank and repressureise it to 10psi? wow thanks, im indebted burnerman, thanks

Hi guys, first thing first, your advice has been invaluable!! I fitted a new pump, well a previously used pump, from ebay. de-pressurised, carefully fitted and wired the new pump, then re-pressurised. Bled the air again from the 3 square nipples, and the bicycle valves, then re-pressurised...

Hi guys, thanks for all the advice. Took the top off and loosened the square release valves, as will as the bicycle tyre shaped one, and only got a very small hiss of air from one of them, the rest all vented water, repressurised to just over one bar and fired up again. all the pipes that I...

Thanks Slapper, I'll take the top off in the morning, can you tell me what the rad vents look like? do i open them till air/ water escapes? thanks, much appreciated

Hi all. I have Worcester heatslave 20/25 around 10 years old, it stopped working yesterday. Seems to be burning and igniting ok, but heating and hot water not working. When I took the from off and switched up the thermostat to fire the burner, it didnt come on.. But when I reset the overheat...