What It Means
- Outdoor ambient temperature sensor Ta abnormal
Lennox Split & Multi-Split
Lennox Split & Multi-Split Error Code 12
Split & Multi-Split: Heat pump (outdoor)
Causes & actions from Lennox
How it shows
- el18kslv outdoor fault display: 12
- el18kslv pcb fault led: 12
Sensor short circuit or open circuit
Applicable models & manual sources
- EL18KSLV
Outdoor ambient temperature sensor Ta 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.
