Ariston 20/1 MFS over pressure

jif06 · 7 Nov 2011

I have the ariston heater( 20/1MFS ) and it will give constant d/h hot water, but when on central heating it goes over pressure and trips on the over temp . Do I just have to replace the expansion vessel to cure the problem or is there something else. I know the relief needs replacing because of the constant recharching of the system.
Thanks

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Ariston 20/1 MFS over pressure

jif06

DIYnot Local

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