Safety: No electrical hazards. Handle coin-cell batteries safely.

Step 1 – Replace battery: Install a new battery in the SmartSensor, ensuring correct polarity.
Step 2 – Move sensor closer: Bring the sensor within a few feet of the thermostat during pairing.
Step 3 – Start pairing mode: On ecobee, go to Menu > Settings > Sensors > Add Sensor and follow prompts.
Step 4 – Avoid metal and interference: Do not mount sensors on metal doors or near large appliances. Keep them away from Wi‑Fi routers and cordless phone bases.
Step 5 – Test with another sensor: If multiple sensors fail to pair, the thermostat’s RF module may be defective and the thermostat should be replaced.

Thermostat does not detect or pair with SmartSensors

Possible Causes