Sorted!
I apologise to my Remeha! It turned out to be the Towerstat wireless prog/sat. It has either developed a fault or is the victim of router interference.
I have removed it and re-installed the original timeclock along with a two wire roomstat; hey presto.....back to normal!
This...
My first post on this forum! Any help much appreciated.
My Remeha Avanta has been in for about 18 months now and had been fine until recently. From first fire up in the morning, the boiler kicks in as usual and I can hear the pump running, but before rads reach temperature the boiler shuts...