What It Means
- EIM Interlock Relay Fault
Lennox Equipment not specified
Lennox Error Code 380
Equipment not specified:
Causes & actions from Lennox
How it shows
- iComfort S30 alert: 380
Priority condition: Service Urgent Interlock relay failure (furnace or air handler modes only). • Interlock relay is energized, but input is not sensed after three seconds. • There will be no heating or cooling due to this alert code – moderate condition. • De-energize interlock relay and energize after five minutes if demand is still present – critical condition.
Applicable models & manual sources
- iComfort S30
EIM Interlock Relay Fault
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.
