When my CH not operating for several hours, say, overnight, the operating pressure drops to zero and won't function unless I top the system up from the tap. It, then, seems to run fine until the next time. I have done this procedure some 10 times now. There are no obvious system leaks as far as I can see and all the radiators are bled. The hot water seems to create more pressure in the system and seems uneffected.
Appreciate any advice, or is this an engineer call out prob.?
Thanks!
Appreciate any advice, or is this an engineer call out prob.?
Thanks!