Combi Boiler Constantly Filling Over Pressure

[TheVictorian]

Drain the system and see if you can hear where the water is entering - it's a long shot but might save you pulling all the floors up!

 

[greg1975]

Well I was going mad with this problem and could not face another night dreaming about it. So off with the kitchen cabinet plinths once more laying on the floor trying to fit my head under the cabinets I spotted something going through a cabinet. In a hidden corner under the boiler a shiny braided filling pipe with a handy tap. Tap off, pressure dumped it no longer fills. The joke is that 3 engineers have been out to this boiler 2 looked under the boiler and came up with various ideas for the fault non of which made as much sense as the advice I have received on here. One of the engineers even visited a month ago when we moved in for the boilers initial inspection and service and passed it so that we could be covered by the maintenance and breakdown insurance despite the high pressure reading. I have no idea how many years this filling loop has been attached for and switched on before we moved in but what a relief to have finally found it. Thanks so much for all your fantastic help and advice.[/img]