What It Means
- LSOM - Compressor internal overload tripped.
Lennox Ducted Heating
Lennox Error Code E400
Ducted Heating:
Causes & actions from Lennox
How it shows
- Integrated control 7-segment display: E400
Thermostat demand Y1 is present; but, compressor is not running. Check power to outdoor unit. Clears the error after current is sensed in both RUN and START sensors for at least 2 seconds, or after service is removed, or after power reset.
Applicable models & manual sources
- SL297UHNV
LSOM - Compressor internal overload tripped.
Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always follow the service manual for your exact unit.
What should you check next?
Continue in ACLogics with guided diagnosis for your equipment and symptoms.
