Thank you for all the suggestions. I have done everything that was recommended, and my bolier is now fully functioning.
Many thanks once again,
JohnnyDee
My Glow-worm boiler pressure keep fluctuating only when the central heating is on. Every time I refill it to 1 bar it goes from 1 bar to almost 4.0 bar. The when the central heating switches off, it goes to 0 bar after a while.
There are no leaks. The radiators have just been bled. The...