I would appreciate any advice/help please
I have a Vaillant EcoTEC plus 831 boiler. I changed a radiator recently following a leak and the next day found the pressure on my boiler rising to 3.0
Engineer came out checked the pressure on expansion vessel and pumped it up. Next day pressure had risen again. Engineer returned and changed the expansion vessel. Problem still there. He then changed the filling loop grey knobs but problem still there. After speaking to Vaillant he has now changed the heat exchange plate. But the problem is still there.
The pressure gradually goes up over several hours, even when there is no heating or hot water being used.
I am completely confused now as is the engineer as he has checked all the parts including prv and diverter valve.
Any ideas please???
I have a Vaillant EcoTEC plus 831 boiler. I changed a radiator recently following a leak and the next day found the pressure on my boiler rising to 3.0
Engineer came out checked the pressure on expansion vessel and pumped it up. Next day pressure had risen again. Engineer returned and changed the expansion vessel. Problem still there. He then changed the filling loop grey knobs but problem still there. After speaking to Vaillant he has now changed the heat exchange plate. But the problem is still there.
The pressure gradually goes up over several hours, even when there is no heating or hot water being used.
I am completely confused now as is the engineer as he has checked all the parts including prv and diverter valve.
Any ideas please???