i have lived in the house for 20+ yrs never had prob before.
the heating system is a back boiler with the cylinder cupboard up stairs in airing cupboard there is no pump or motorised valve in the cylinder cupboard. the cold water storage tank is also in the airing cupboard with the header tank in the loft.
was heating the hot water up via the controls from the back boiler( not immerson) and the header tank in the loft after bout 45 min started to pump over via the vent. any help? many thanks
the heating system is a back boiler with the cylinder cupboard up stairs in airing cupboard there is no pump or motorised valve in the cylinder cupboard. the cold water storage tank is also in the airing cupboard with the header tank in the loft.
was heating the hot water up via the controls from the back boiler( not immerson) and the header tank in the loft after bout 45 min started to pump over via the vent. any help? many thanks