Thanks for posting back - I am sure the pump used to over run for about 10 minutes or so after the boiler turned off.
The valve is a 2 port one - the wiring doesn't go between the valve and the pump - but fom the valve to the boiler (or at least heads towards the boiler somewhere as I can't...
Hi Forum,
The central heating pump on my conventional system is always on 24/7 and never switches off like it should do....hopefully someone can shed some light on where the fault might be.
Here is a description of the system...
There is a Honeywell two way valve next to the central...