Lennox Equipment not specified

Lennox Error Code 400

Equipment not specified:

What It Means

  • OD LSOM Comp. Internal Overload Tripped

Causes & actions from Lennox

How it shows
  • iComfort S30 alert: 400

Priority condition: Service Soon The compressor internal overload has tripped. • Thermostat demand Y1 is present; however compressor is not running. • Check power to unit.

Applicable models & manual sources
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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