I have a Drayton Digistat 30002/RF601.
This was a new unit in 2008 and worked perfectly.
I believe a 'guest' tampered with the thermostat control during the very cold spell in December 2010.
The only temperature settings now available are between 23 & 27 degrees!
The company that fitted the system are no longer in business - does anyone know how I can repair this?

Using too much gas, February 2011

You don't repair thermostats. You replace them.

Make a note of what wire is which and just replace it with a new one.

TURN OFF THE POWER FIRST!!!!!!!!!!!!!!!

T, February 2011