Thanks. I tried hot tap whilst water off and pressure stayed 0.9. It has remained that level whilst cold now that water supply isolation valve is off.
I will seek help to try the suggested tests made on the valves as it may be too technical for me and wouldn't want risk incorrect assembly.
Ok, I queried about faulty valves but told would need new heat exchanger as only thing left. Boiler was installed 2006. I moved in December and no problems until topped up pressure as was a tad low. With water feed into boiler turned off, pressure runs about 1.9 without any leakages. Ok...
Yes couldnt stop water coming through so thought valves may be faulty. Plumber put new o-rings in hose but couldnt stop water flowing to start with but after hour it played up again.
Hi
since topping up pressure on my valliant 831 ecotec plus the pressure has gone over 3 bar. This occurs even when the boiler is not in use. In order to maintain constant 1bar I have turned the water feed to the boiler. The taps have been checked, o-rings replaced in the braided...