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problem with hot water been expelled....please help! thanks?

My combi boiler (model puma 80e) saddenly started expelling hot water with lot of pressure into the garden from the pipe I think is connected to the safety valve. Do anyone know the cause? After that appened, the water pressure went down to zero, so I tried to pressure it up again, but the water went straight out again. I never had problem before! What can I do to bring it back to normal? Many thanks.

Marco
June 2008
HI Marco,
It sounds as if you expansion vessel is either under-charged or has failed and needs replacing.

Also, when you do top up your system pressure, make sure its 1-1.5bar when cold.

T
June 2008

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