In the business of refrigeration service, most problems are resolved effectively with systematic, procedural diagnostic techniques. However, every so often we experience situations that cannot be diagnosed by traditional methods. I call these situations intermittent problems.
A technician who works on ice machines and other refrigeration equipment will occasionally experience a similar situation. The customer calls and reports, “My ice machine is not making enough ice. It keeps shutting off and I have to reset it.” The tech goes to the job and resets it, or begins checking the machine that has already been reset and finds that it runs just fine. Everything checks OK.