My 28i junior worcester bosch boiler keeps losing pressure I have had around 10 call outs, the prv has been changed, radiators checked no sign of a leak and still every week to 2 weeks the pressure drops down on red,please help

darren black, March 2008

Has anyone checked the expansion vessel as it may have lost it's air charge. I always check the vessel on every service.
Also do you have an auto air vent that may be leaking?

Boilerman 1967, May 2008

If its taking that long to lose pressure it will be worth trying " Internal Leak sealer,"most major central heating chemical manufacturers make it,like Fernox,Salamander,Sentinel . you should all so, once the " leak " stops add Inhibitor to protect your system from corrosion , as any in it now will be over dilluted

combiking, March 2008

WITH A SMALL LEAK LIKE THIS ,BEST TO INJECT FERNOX LEAK SEALER INTO SYSTEM TO CORRECT SIDUATION

TONY, March 2008