(ALE4) alert 4: thermal overload January 29, 2020 21:23 Updated Related articles Fault 4, Gate no load, Smart DC operators What can I do to correct an "Overload" error on a 1050 control board? Troubleshooting Error Code Flowcharts for STC controller (ALE1) alert 1: gate forced open (FAL3) fault 3: low voltage sag