We may have found other answers which could help you.
Click here for Heating Pipes Underfloor
How to fix my fireplace?
Worcester 30 Cadillac combi boiler won’t fire up and the EA?
Remove cover off gas boiler?
How do i stop the time from flashing on the Siemens RDJ100RF?
Oil fired boiler thermostat?
Siemens RDJ10RF thermostat problem?