It is possible that the indoor and outdoor units are not in contact with each other.
These can be reconnected by taking the indoor unit to the outdoor unit and then removing 1 battery from both units. Replace the batteries in both units within 1 minute of each other.
The units will then search for each other and connect.
Do not use rechargeable batteries in the indoor unit, as they have a lower voltage than normal batteries.
For the outdoor unit we recommend the use of Lithium batteries as they can better withstand lower temperatures.
You can order these batteries via our website https://www.alectohome.nl
If you have any further questions, please contact us via our contact form.