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
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
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