Have had those self and same issues. The give away for me is when the system should be shut down the pump is running. Couple of movements of the override and it shuts down.
I hope this is not the kiss of death but I have 2. The hot water is mounted horizontally and the central heating vertically. Its always been the horizontal one that's given problems. Either the motor or the micro switches. I managed to blag a supply of micro switches.
Changed the Landis Gyr for quite expensive Honeywell so we will see.
Last edited by: Fullchat on Wed 23 Dec 20 at 23:19
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