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Just to amuse. I have attached a photo of the current wiring harness birds nest!

At the moment the boiler is being controlled by demand from both the wireless thermostat receiver and from the end switch on the two port valve. My plan now is to latch the two port valve open and remove the wiring to it from the harness. Check that this works. If it does then completely...

We no longer have a hot water cylinder. I should have mentioned that the boiler is a combi. Hot water is direct mains pressure from the combi. I suspect the motorised valve is a hangover from the original installation and should have been removed when the boiler was replaced.

I am planning to update my ch system to a tado system with motorised valves on every radiator. My current system has a single heating circuit (zone) which is controlled via a two port valve. The tado can provide multiple zones by controlling individual radiators. Can I remove the current two...