Recent content by ian2009

I got rgi to replace the DHW differential valve, he also checked/pressurised the expansion vessel and all is now working fine. Thanks for all of your help. :)

When I run the boiler with the selector switch set to CH+HW, initially the CH works as expected, the temperature stays in the 40-50deg range, the CH green neon constantly illuminated, all rads hot (as expected). The CH will work like this so long as hot water is not used. Then I turn a hot...