We had a problem with sludge and got a plumber to pump it round and the system has now been fully drained and refilled, and bled of air. However, last week only the upstairs rads were working, and after watching the system for a while we found the boiler only lights for about 60 seconds then switches off. Ive checked the pump is spinning ok, so Im stuck for ideas?
Could it be the impeller blades in the pump, or should I be looking at the roomstat..(can I isolate it to see if thats the problem? Any ideas gratefully received. Many thanks Maskie