What It Means
- HIGH PRESSURE SWITCH COMPRESSOR 2
Lennox Unit controller
Lennox Unit controller Error Code 14
Unit controller
Causes & actions from Lennox
How it shows
- M4 alarm code: 14
Compress is off. Check charge, fans or coil. This feature is not support in Model L at this time. NOTE: On Ultra-High efficiency units tandem alarms (14) compressor 2 high temperature S8 switch. If accompanied with alarm 15 then most likely the S4 high pressure switch is the issue. The CORE Unit Controller will clear high pressure switch alarm when corresponding high pressure switch is detected as closed. Compressor will not be restarted until corresponding high pressure switch is closed and Minimum Off Delay (cooling or heating) has expired.
Applicable models & manual sources
- MODEL L - M4 UNIT CONTROLLER
HIGH PRESSURE SWITCH COMPRESSOR 2
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.
