What It Means
- LSOM - Compressor open circuit.
Lennox Ducted Heating
Lennox Ducted Heating Error Code E405
Ducted Heating:
Causes & actions from Lennox
How it shows
- Integrated control 7-segment display: E405
Check capacitor, wiring, hard start kit , replace Compressor.
Other manual wording (1 of 2)
SLP98UHV
Check capacitor, wiring, hard start kit , replace com- pressor.
Other manual wording (2 of 2)
SL297UHNV
Compressor circuit open (due to power disconnection, open fuse, etc.) Clears the error after 1 normalcompressor run cycle.
Applicable models & manual sources
- SLP99UHV
LSOM - Compressor open circuit.
- SLP98UHV
LSOM − Compressor open circuit.
- SL297UHNV
LSOM - Compressor open circuit.
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.
