Thanks for you contribution, most helpful! Thought this forum was for comments/help with Plumbing and Central Heating. Have you nothing better to do but criticise people you don't know?
I can see this has been covered lots of times before, but I can't get to the bottom of this problem. The heating comes on even with the thermostat turned down and when the CH & HW is turned off at the controls. The only way to make sure it is off is to switch off the power supply to the...