While you wait for answers, we may have found some information which could help you.
Click here for Click Heating Replacedhow do i remove plastic top of myson thermostat?
How can I fix myson Apollo?
how do i remove the cap from a myson 2 way trv?
Myson thermostat won't click on?
How can I get a Myson thermostatic radiator valve to work?
myson trv 2 way?