Sub-Zero Refrigerator Error Code: EC 40

The freezer compressor is running excessively. In addition to error code EC40 you may also see a Sub-Zero flashing service light.

The freezer door may have been left open or the condenser coils need to be cleaned. Close the door and/or clean the condenser coils. Wondering how to reset a Sub-Zero refrigerator error code of EC40? Press and hold the control panel’s door ajar alarm key for 15 seconds. If the door wasn’t open, the coils are clean and the internal temperature is significantly high, call a professional service Sub Zero Support.