Power cycling a Sensor can be used to help restore the connection of the sensor to the Ecovent system. Power cycling the Sensor can also help to restore connection for that room's vents and is recommended after a power outage.
To power cycle a Sensor:
Unplug the Sensor from the wall and plug it back in
You should see the blue light flash and then go off
If you do not see a light, verify that the outlet the Sensor is plugged into is not controlled by a switch and that the outlet has power. If you are unsure if the outlet has power, try plugging something else into the outlet such as a lamp.