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Mend Ultimate 50FF Valve Out Running

boiler wont keep running?

iv'e changed a rad valve, bled the system, the boiler starts but only runs for about 30 seconds and then cuts out, its a Ultimate, 50FF

Ant. Dev.
November 2011
UltimateUltimate 50FFHeating, Home Heating SystemsValve Out Running

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Ultimate 50 ffUltimate FF 446.373

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