Thanks for the advice. I'll try that. The boiler stat doesn't seem to make much difference at all. Even with the hot water tank at 64 degrees and the stat set to 1, it just keeps on burning. At other times with the stat set high, it fails to light for ages.
Please help me to understand what is wrong with this Potterton Neataheat Electronic boiler.
Everything functions as it should but the burners shut down for long periods when they should be full on resulting in luke warm system. It also cycles the burner rail on and off at times.
It feeds a...