If you’re looking for help fixing your Lennox air conditioner, look no further! Our comprehensive Lennox air conditioner repair guide will explain common issues, provide troubleshooting tips, and show you how to read your model’s error codes.

CODE: E0
PROBLEM: EEPROM parameter error

CODE: E1
PROBLEM: Indoor/outdoor units communication protection

CODE: E2
PROBLEM: Zero-crossing signal error

CODE: E3
PROBLEM: Indoor fan speed out of control

CODE: E5
PROBLEM: Open or short circuit of outdoor temperature sensor or outdoor unit EEPROM parameter error

CODE: E6
PROBLEM: Open or short circuit of room or evaporator temperature sensor

CODE: E7
PROBLEM: Outdoor fan speed out of control

CODE: P0
PROBLEM: IBM malfunction or IGBT over-strong current protection

CODE: P1
PROBLEM: Over voltage or too low voltage protection

CODE: P2
PROBLEM: Temperature protection of compressor top

CODE: P4
PROBLEM: Inverter compressor drive error

lennox air conditioner codes

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Work was done neatly. Can barely see the pipe that was installed

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Great guys Daniel and Shane did an excellent job

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KDM did our fireplace gas line and heat venting

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