Hello, can I ask some advice? I have the above combi & a couple of days ago it began faulting on code 40, low pressure, after being off for the night. I checked the expansion vessel which was at 3/4 bar. Using the schrader valve I discharged it & no water came out. I drained the water system & recharged the vessel to 1 bar. Rechecked the pressure twice in the following hour & it hadn't dropped so refilled the water & fired it up. Within 10 minutes the pressure was 3.5 bar & coming out of the relief valve. The next time it cooled down, owing to the lost water, it was 0.4 bar & faulting. The flexible hose connecting to the vessel isn't kinked & the radiators are nice & hot. Could you please point me in the right direction? Thanks in advance for your replies

pip, February 2008

For info it was the flexible link pipe to the expansion vessel which was blocked with sediment. Cheers, Pip

pip, February 2008