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My son has a worcester 28i junior boiler and the pressure gauge is showing 4.something, all the way round to the stop pin. Does anyone know how i relieve this pressure. Thank you.

Sounds very technical, how do i do that? Thanx. But, having re-checked the pressure gauge i thought was on zero, on closer inspection it has gone all the way round the dial to 4.something. how do i lower the pressure?

Thanks, bster, will try that 2mz, got into such a loop with things i will start from scratch again. Will let u know, thanx again for reply!

After having some bursts repaired the plumber was not able to refill the boiler as the key had been lost. I have now bought a new key, filled the system, bled the radiators, they all heat up, but the boiler pressure gauge is showing no pressure. Could there be an air-lock somewhere? What do i...