Fatboise wrote:

Here's the problem.......

I have a oil fired burner heating the rads and hot water cylinder in my
house (new self build house). The house heating is divided into 4 zones
- Hot water, downstairs rads, upstairs rads and kitchen rads by 4
motorised valves. These valves are actuated by four switches located in
the kitchen. I should also mention that the only room thermostat that I
have is in the kitchen which will close the motorised valve when it
gets to temperature.

....
You have checked the manual of your 'oil fired burner' to ensure it needs
a bypass