Thanks for the responses.
If I am unable to sort out the problem myself then I will certainly get someone in to look at it, in all fairness I did speak to him on the phone several times but put nothing in writing so that will be the next step.
Short term it would be useful if I could turn the...
The heating is off but the radiators are still warm.
A new Y valve and motor has been fitted and the Nest thermostat clearly operates the valve so I am at a loss to understand why the radiators are still heating up.
I can of course turn every radiator off but that hardly solves the problem.
This...