What It Means
- High pressure switch abnormal
Lennox Split & Multi-Split
Lennox Error Code 42
Split & Multi-Split: Heat pump (outdoor)
Causes & actions from Lennox
How it shows
- el18kslv outdoor fault display: 42
- el18kslv pcb fault led: 42
After compressor running for 3 minutes, switch open circuit and last 30 seconds
Applicable models & manual sources
- EL18KSLV
High pressure switch abnormal
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.
