Lennox Mini Split Error Codes
20 codes · manual-verified where marked · draft entries clearly flagged
E-codes
- Lennox E1 error code draft
[M22A/M33C] Communication error between indoor unit and outdoor units.… - Lennox E3 error code draft
[M22A/M33C] Indoor fan speed error (DC motor).… - Lennox E4 error code draft
[M22A/M33C] Indoor room temperature sensor error (T1).… - Lennox E5 error code draft
[M22A/M33C] Indoor coil temperature sensor error (T2).… - Lennox EC07 error code draft
[3WMC Indoor Units] The outdoor fan speed is operating outside of the normal range. EC.… - Lennox EC51 error code
EC51 on Lennox mini splits (3WMC indoor units) means an outdoor unit EEPROM parameter error - the outdoor cont… - Lennox EC52 error code draft
[3WMC Indoor Units] Condenser coil temperature sensor T3 is in open circuit or has short circuited. EC.… - Lennox EC53 error code draft
[3WMC Indoor Units] Outdoor ambient temperature sensor T4 is in open circuit or has short circuited. EC.… - Lennox EC54 error code draft
[3WMC Indoor Units] Compressor discharge temperature sensor TP is in open circuit or has short circuited. EC.… - Lennox EC56 error code draft
[M22A/M33C] Indoor unit #1 coil outlet temperature sensor error (T2B for multi-zone) Indoor unit #2 coil outle… - Lennox EL01 error code draft
[M22A/M33C] Communication error between indoor unit and outdoor units.…
F-codes
P-codes