Hi
I have a Glow Worm 30SI boiler that has just started failing with over pressure. The filling loop is disconnected and I drained the boiler down from the drain valve to get the pressure back to 1 bar. I have it switched off at the control to not come on but to still show the pressure and it steadily rises back to 3 bar with no heat and no way of filling from the cold supply.
I have an Ariston unvented cylinder next to it that supplies us hot water and I can only imagine that somehow the internal heating pipe inside the cylinder has developed a leak and this leak is then using mains pressure to flow into the boiler??
This is my guess as I can't see any other way of the boiler pressure continually going back up with no heat. I turned the cold inlet stopcock off to stop any more mains pressure into the cylinder but the pressure to the boiler kept rising so I guess that just means that the existing pressure in the cylinder is still enough to flow into the boiler loop?
I have a call out with my home insurance but they won't arrive until tomorrow and my general experience of the expertise has been underwhelming.
Any advice on how to isolate the problem would be appreciated. I guess I could shut off the cold supply and then drain the cylinder??
Thanks
I have a Glow Worm 30SI boiler that has just started failing with over pressure. The filling loop is disconnected and I drained the boiler down from the drain valve to get the pressure back to 1 bar. I have it switched off at the control to not come on but to still show the pressure and it steadily rises back to 3 bar with no heat and no way of filling from the cold supply.
I have an Ariston unvented cylinder next to it that supplies us hot water and I can only imagine that somehow the internal heating pipe inside the cylinder has developed a leak and this leak is then using mains pressure to flow into the boiler??
This is my guess as I can't see any other way of the boiler pressure continually going back up with no heat. I turned the cold inlet stopcock off to stop any more mains pressure into the cylinder but the pressure to the boiler kept rising so I guess that just means that the existing pressure in the cylinder is still enough to flow into the boiler loop?
I have a call out with my home insurance but they won't arrive until tomorrow and my general experience of the expertise has been underwhelming.
Any advice on how to isolate the problem would be appreciated. I guess I could shut off the cold supply and then drain the cylinder??
Thanks