About 4 or 5 years ago we had an issue with our Gloworm boiler where it came up wit F22. It is a conventional boiler and we don't use it a great deal, if it all for the warmer months. We use electric for hot water and don't have any heating on. We tend to start to use the heating in Nov time and finish in about Feb depending on the weather.
Anyway we fixed it last time by opening the drain valves on the flow and return pipes which are just above the boiler. We filled a bucket a few times, during which time some air came out. Once enough air had come out it all worked fine. It continued to work.
We've just come to put the heating on again and we are getting the F22 error again.
So, I knew what to do, I put a hose on the first drain valve and opened it, filled a bucket up but there wasn't much air coming out, if any.
I swapped to the back drain valve, as I opened it a few drops came out. I've then tried to open it further but nothing happens, no more water comes out. I can end up winding the whole thing out of the drain valve with nothing coming out.
How can this happen? Is the valve seized? How did they work inside?
These drain valves are in a really awkward place, so not easy to get to.
Anyway we fixed it last time by opening the drain valves on the flow and return pipes which are just above the boiler. We filled a bucket a few times, during which time some air came out. Once enough air had come out it all worked fine. It continued to work.
We've just come to put the heating on again and we are getting the F22 error again.
So, I knew what to do, I put a hose on the first drain valve and opened it, filled a bucket up but there wasn't much air coming out, if any.
I swapped to the back drain valve, as I opened it a few drops came out. I've then tried to open it further but nothing happens, no more water comes out. I can end up winding the whole thing out of the drain valve with nothing coming out.
How can this happen? Is the valve seized? How did they work inside?
These drain valves are in a really awkward place, so not easy to get to.