What It Means
- Compressor open circuit.
Lennox Split & Multi-Split
Lennox Split & Multi-Split Error Code E405
Split & Multi-Split: Air handler (indoor)
Causes & actions from Lennox
How it shows
- Single-character display: E405
This manual entry does not list further causes or actions.
Applicable models & manual sources
- CBX40UHV
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.
