Wireless Temperature Sensor or Smart Thermostat
Replace the flat batteries from your Smart Thermostat or Wireless Temperature Sensor with three fresh AAA alkaline batteries (LR03). (We do not recommend using Duracell Optimum batteries, as they are too short to power the Smart Thermostat).
For a Wired Smart Thermostat, make sure the power supply to the heating system is off before removing the front cover of the device.
If your Smart Thermostat has a screw on the bottom edge, you’ll need a screwdriver to open the device.
Smart Radiator Thermostat
The batteries you use for your Smart Radiator Thermostat depend on the hardware version of the device. The device Model number is printed near the pairing button.
For the VA01 Smart Radiator Thermostat use two fresh AA alkaline batteries (LR6).
For the VA02 Smart Radiator Thermostat (available since 2019) and the Smart Radiator Thermostat Basic you can either use:
two fresh AA alkaline batteries (LR6) or
Two Panasonic Eneloop AA 2000 mAh NiMH rechargeable batteries (we do not recommend using any other type of rechargeable batteries).
Remove the batteries from the device and wait 10 seconds before putting in the new batteries, then close the battery compartment. Then wait 1 minute before you remount the device. This ensures the device will calibrate successfully.
Your VA02 Smart Radiator Thermostat will recognise whether you are using alkaline or rechargeable batteries automatically and adjust to the different discharge curves to send the low battery email at the correct time.
When replacing the batteries, please remember the following:
Only use the indicated battery type for your device model.
Do not mix battery types.
Do not mix old and new batteries.
Replace all batteries at the same time.
Make sure the positive (+) and the negative (-) battery polarities are correctly aligned with the symbols in the battery compartment.