What It Means
- EVAPORATOR FROZEN COMPRESSOR 4
Lennox Unit controller
Lennox Unit controller Error Code 38
Unit controller
Causes & actions from Lennox
How it shows
- M4 alarm code: 38
Compressor is off. Check SST sensor, air flow, charge, coil, air filter and outside air temperature..
Applicable models & manual sources
- MODEL L - M4 UNIT CONTROLLER
EVAPORATOR FROZEN COMPRESSOR 4
MODEL L - M4 UNIT CONTROLLER, M4 Unit Controller
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.
