Exiting Thermostat debug display

If the Thermostat is in a debug mode you'll recognise it by the following characteristics:

• Small white engineering text in the top left of the screen or a large solid colour rectangle cycling from red, green, blue and then black
• Up and down button presses change the content of the screen 

Well done - you got here with a secret key combination! Don't worry, the thermostat is not broken and it is easy to exit:

• Wireless thermostat: Remove from the wall bracket and press the reset button on the back
• Wired or Wireless thermostat: Hold the up and down button at the same time until the screen returns to the room temperature screen