Lennox Equipment not specified

Lennox Equipment not specified Error Code 11

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.

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%.

Causes & actions from Lennox

Missing Device

Models: iComfort S30

How it shows
  • iComfort S30 alert: 11

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.

Applicable models & manual sources

humidity sensor error: Without humidifier or dehumidifier and the sensor reads out of range 0% to 100%.

Models: CS7500

How it shows
  • cs7500 notification display: 11

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.

Applicable models & manual sources
  • CS7500

    humidity sensor error: Without humidifier or dehumidifier and the sensor reads out of range 0% to 100%.

    CS7500 manual, page 32

Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always follow the service manual for your exact unit.

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