Lennox Equipment not specified

Lennox Error Code 3003

Equipment not specified

3003 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: Replace UV Bulb
  • iComfort S30: UV Light

Causes & actions from Lennox

Replace UV Bulb

Models: iComfort S30

How it shows
  • iComfort S30 alert: 3003

Priority condition: Maintenance Not Applicable

Applicable models & manual sources

UV Light

Models: iComfort S30

How it shows
  • s30 service notification: 3003

This manual entry does not list further causes or actions.

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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