Repairing reach-in coolers and freezers with electronic temperature controllers can be challenging at times. Some failures are easy to troubleshoot and repair, but others can be frustrating. For ...

The useful troubleshooting techniques that follow are the result of 20 years of electrical-engineering projects in the automotive, biomedical, instrumentation, and telecommunications areas.

A common metering device used on new walk-in cooler/freezers today is the electronic expansion valve (EEV). It allows for a tighter control of a refrigerant’s superheat value leaving the evaporator ...