Hi All I was so impressed with the help everyone is offering, I thought Id ask if anyone had any ideas about whats the problem with mine.. Standard non-sealed sytem with Ideal classic boiler, Grundfoss 15-20 pump, Honeywell roomstat running 10 rads.
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