What It Means
- iComfort S30: Missing Device
- CS7500: humidity sensor error: Without humidifier or dehumidifier and the sensor reads out of range 0% to 100%.

Equipment not specified
11 means different things on different Equipment not specified models. Enter your model number to see only your reading, or find your model below.
Models: iComfort S30
Priority condition: Service Urgent The thermostat cannot find a previously installed system component. • Check all system components (devices) connections to make sure they are Lennox communicating compatible. • Cycle system power. • If problem persists, then check all system components (devices) connections to make sure they are Lennox communicating compatible. • Go to menu > settings > advanced settings > view dealer control center > equipment and press reset all equipment. This will allow the system to auto-detect any Lennox communicating components attached.
Missing Device
Models: CS7500
humidity sensor error. Condition: Without humidifier or dehumidifier and the sensor reads out of range 0% to 100%. Priority: 1 (middle). Message Type: critical. System Action: The reading for humidity will not be valid. This message indicates hum sensor is not working correctly. The display of Indoor Humidity on HOME screen will be "--". This error is displayed in notification screen.
humidity sensor error: Without humidifier or dehumidifier and the sensor reads out of range 0% to 100%.
Continue in ACLogics with guided diagnosis for your equipment and symptoms.