Articles by Joe Marchese

While servicing equipment, technicians should be on the lookout for sources of potential future leaks, as well as follow good service practices to prevent creating leaks.

When installing and repairing refrigeration equipment, technicians should always follow good service practices to prevent any contaminants from entering the piping or system components.

Repairing reach-in coolers and freezers with electronic temperature controllers can be challenging at times.

While repairing a system, technicians should try to look ahead and avoid common issues that can make repairs more difficult.

Pressure testing a system with dry nitrogen can be a very effective method of verifying a system is leak-free.

Servicing new reach-in coolers and freezers containing R-290 is not tremendously difficult but does require some different servicing procedures.

One of the major components in any refrigeration system is the evaporator, and there are several types of direct expansion (DX) evaporators that can be used.

When faced with a leaky coil on a reach-in cooler, a decision needs to be made whether to repair or replace it. The final decision may come down to where the leak is located.

Technicians have the choice of using either a digital or mechanical manifold gauge. Each one has its benefits and disadvantages, which is why it may pay to own one of each kind.

Technicians should learn how to troubleshoot defrost timers, as they can be the culprit if a freezer that uses an electric heater as its supplemental heat source has a frozen evaporator coil.