If the unit does not run, or if it short-cycles, it can be due to a dead or weak overload protector. An overload protector is…

1. Disconnect the power and wires connected to the timer terminals. 2. Check the diagram inside the timer door for normally open (NO) and normally…

As you can see in figure 54b, only one of the power lines is connected directly to the loads (compressor, fans, and defrost heater). The…

In residential units, timers are usually located behind the toe plate (front grille at the bottom of the unit) near the front or back of…

Potential relays are wired to all three compressor terminals and not just to the compressor run and start terminals. When a compressor motor fails to…

These relays are directly or indirectly attached to the compressor run and start terminals. The relay terminal attached to the compressor run terminal is marked…

Starting relays in commercial units (unlike residential types) are not always fastened directly to the compressor terminals. They are usually installed in a box next…

1. Disconnect the power supply, remove the unit, and remove the plastic cover. compartment cover of the unit, and remove the plastic cover. 2. Remove…

The starting relay provides power to the start winding of the compressor during start-up for approximately three seconds. At this time, the compressor reaches about…

Valves in figure 45k can be installed on the compressors having high- and low-side access tubes or on the tubing. Remove the valve cap and…