This method of charging is used where the evaporator can be readily seen, such as in manual-defrost units, cycle-defrost units, and most commercial units where…

a. Check the nameplate on the unit to determine the exact amount of charge. This figure is reflected in ounces. (Some larger commercial units indicate…

A charging cylinder is a tool that provides the means to place a specific amount of refrigerant into a unit (see p. 112). It is…

When measuring the charge by an ammeter, bear in mind that with the unit running, the more refrigerant is charged into the unit, the higher…

1. Shut off the unit. 2. Connect the vacuum pump to the center connection of the gauge manifold, and the gauge manifold to the high…

1. Remove the old filter-drier. (If it is silver-brazed, use a tubing cutter and cut about one-fourth inch from the drier. If it is a…

1. When transporting a refrigerator, never lay it on its side or back because the compressor oil leaves the compressor. Then when in place and…

1.Visually inspect the condition of the door seal. Pick a spot and place a piece of paper between the gasket and door jamb. With the…

Gaskets are installed to prevent air from getting into the cabinet. Magnetic and compression gaskets are the two types used in refrigerators and freezers today.…

This simple method of checking the defrost system will benefit you the most after studying the chapter on “Basic Electricity,” as this test requires some…