Hello,
I have a gravity hot water / pumped central heating system. I drained the system to replace a radiator, and on refilling have the following results:
Hot water is not heating. Boiler turns on, but cycles off after about
30 second. Radiators are not filling up with water, despite tying to bleed them.I have checked the header tank, and it is full. The layout of the heating is that the boiler and hot water cyllender are on the first floor, with all the central heating pipes in the ceiling of the ground floor (with pipes going down to each radiator on the ground floor).
Any ideas?
Thanks for any info,
Tony Lennard