Freezer Temp Alarm

Question

Temp alarm come on, yet temp (fan blowing and cold air) working. Turn the temp control just a notch up and immediately the temp lite goes out. Later it will start up again. It seems the freezer is working fine, just the temp moritoring system is malfuncting. Looking at the Data Sheet wiring it shows an "Electronic Module" in the system. Not sure if that's the problem or the temp sensor.

Any Help