Ecobee Thermostat Not Connecting or Temperature Issues

Common Causes

When your ecobee thermostat is not connecting to WiFi or displaying incorrect temperature readings, the problem typically stems from one of these issues:

• WiFi network password changed since the thermostat was last configured
• Router firmware update that altered network settings
• Internet outage in your area
• Thermostat too far from the router for a reliable WiFi signal
• SmartSensor battery depleted, causing it to report no temperature
• SmartSensor placed in a poor location, reading inaccurate temperatures
• HVAC system issue causing temperature drift

Fixing WiFi Connection Issues

Step 1: Check Your Internet Connection

Verify that other devices in your home can access the internet. If your internet is down, the ecobee thermostat will show a disconnected icon on its display but will continue to control your HVAC based on its last known schedule. Once internet service resumes, the thermostat should reconnect automatically within a few minutes.

Step 2: Restart the Thermostat

1. On the thermostat, go to Main Menu, then Settings, then Reset.
2. Select Restart. This reboots the thermostat without erasing any settings.
3. Wait for the thermostat to boot up, which takes about two minutes.
4. Check whether the WiFi icon reappears on the display.

Step 3: Reconnect to WiFi

If the thermostat does not reconnect after a restart, you may need to re-enter your WiFi credentials.

1. On the thermostat, navigate to Main Menu, then Settings, then WiFi.
2. Select your network from the list.
3. Enter your WiFi password carefully, paying attention to uppercase and lowercase letters.
4. Wait for the thermostat to confirm it is connected.

Step 4: Restart Your Router

If the thermostat cannot find your network or fails to connect, restart your router by unplugging it for 60 seconds and plugging it back in. Wait three minutes for it to fully boot, then try connecting the thermostat again. If your router has both 2.4 GHz and 5 GHz bands, try connecting to the 2.4 GHz band, which generally provides better range to the thermostat location.

Fixing Temperature Issues

Step 5: Check SmartSensor Battery

If your SmartSensor is reporting inaccurate temperatures or has stopped reporting entirely, the CR2477 battery may be depleted. Open the ecobee app and go to Sensors. If a sensor shows a low battery warning or is offline, replace the battery. The sensor housing pops open by pressing the tab on the back.

Step 6: Evaluate Sensor Placement

Temperature readings can be inaccurate if the sensor is placed in a problematic location. Check for these common issues:

• Sensor is in direct sunlight, causing artificially high readings.
• Sensor is near a heating vent, radiator, or fireplace.
• Sensor is near an exterior wall or drafty window, causing lower readings.
• Sensor is behind furniture or in an enclosed space, reducing air circulation around it.

Relocate the sensor to an interior wall at about four to five feet above the floor, away from heat sources and drafts.

Step 7: Review Comfort Setting Participation

If your home feels too hot or too cold even though the thermostat shows the correct temperature, the issue may be with which sensors are participating in the active comfort setting.

1. In the ecobee app, go to Settings, then Comfort Settings.
2. Select the current comfort profile (Home, Away, or Sleep).
3. Check which sensors are listed under Participating Sensors.
4. The thermostat averages the temperature from all participating sensors. If a sensor in an unused room is pulling the average up or down, remove it from that comfort setting.

Step 8: Calibrate the Thermostat Temperature

If the thermostat's built-in sensor consistently reads a few degrees off from a known accurate thermometer, you can apply a temperature correction. On the thermostat, go to Main Menu, then Settings, then Installation Settings, then Thresholds. Look for the temperature correction option and adjust it by the number of degrees needed.

When to Contact Support

If the thermostat repeatedly drops WiFi after reconnecting, or if temperature readings fluctuate wildly without environmental cause, contact ecobee Support for further diagnosis. A hardware issue with the WiFi module or temperature sensor may require a replacement unit.