The batteries are low in the Wireless Room Thermostat and they will probably only last for another few weeks before the thermostat stops working altogether.

Here is a video to show you how to change the batteries

Gently slide the thermostat up about one centimeter.

Pull the thermostat away from the wall, leaving the backplate attached to the wall.


Remove the 2 x AA batteries, (note the orientation of the batteries, one is up and one is down).

Wait 30 seconds before putting in the new batteries.


Put in the 2 new AA batteries, (note the orientation of the batteries, one is up and one is down).

Rechargeable batteries should not be used as their voltage is too low (1.2v not 1.5v).


Select the Room Thermostat with the flat battery

The old number for the Room Thermostat may be on the side of the device.



Your system will take around a day to update with your devices values and for any errors to clear.



Wake up the device by short pressing one of the arrow buttons once.



The Genius Hub will check the battery level to ensure that the new battery level has been reported by the device.



Replace the thermostat on the wall, starting by locating the thermostat onto the backplate and then sliding it down about one centimeter.