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thanks for your help i will give it a try :D

the air presure is going very high when the heatings on or using the hot water. a plumber friend said its the air presure but doesn't know what it should be for this type of boiler

my boiler isn't working right i think its the air pressure in the small expansion tank its a worcester 9.24 electronic (very old) does anyone know what it should be as i haven't got a manual and cant find one on the net :?

can anyone tell me what air pressure a expansion tank should be at on a worcester 9.24 boiler as i have no manual

what air presure should the expandsion tank be on a worcester 9.24 boiler