Temperature sensors signal the compressor to start when the temperature inside the refrigerator rises above its set point. 1. If the windings test OK, but it still won’t run, then I connect a test cord and try to run it manually. If it runs longer than that, the compressor can overheat or its motor can burn out. Try a new overload or compressor: Family Handyman. Then see the relay and find our that which one terminal is common, start and run.

Or just a bad overload or compressor relay (refrigerator compressor cost is about $20). Since the compressor is an important part of the fridge, you usually check this part when the refrigerator has a cooling problem.

The compressor of a fridge utilizes a gaseous refrigerant that is in a low-pressure state. Now, you have to check for other alternatives for saving food, other than a large repair bill or purchasing a new fridge. If the relay fails, however, the compressor might not ever kick on, so you may have to bypass the refrigerator's relay system. This is an electrical switch that tells the compressor when to turn on or off depending on the need for cool air inside the unit. See if the compressor fails to engage or the fan fails to spin as the cool air empties from the unit. The relay is in the on/off operating command. Refrigerator Compressor Fan Stops. or switch of the supply which is connected to the fridge. Set the multitester to the ohms setting X1. Test the compressor motor for continuity using a multitester. When the fridge thermostat requests more cold air, the compressor kicks on and the refrigerant becomes high-pressure, moving through the cooling coils while fans push the cool air into the fridge … A good way to check for proper fan and compressor performance is to leave the doors open on the fridge for a few minutes while plugged in. If you want to check your fridge compressor then flow the below steps.

The multitester should display a … The run capacitor of the refrigerator is an important component in its start up relay. And if the fridge goes on the repair mode, then it is a cause of concern. The refrigerator compressor is both a motor and a pump that move the refrigerant through the system. Read on to learn how to test a refrigerator compressor. Continued from page 2.

The run capacitor assists the refrigerator compressor, which should only run for a few minutes in any given hour. For the compressor to be connected, the start relay is required, it is responsible for supplying energy to the unit. A refrigerator that makes a buzzing or humming sound and doesn’t keep the food cold may have: A blown compressor (big bucks). Place one probe on any terminal and then touch the other probe to each of the other two terminals. To know more about compressor check… A compressor can't run continuously, so the relay is used. But when a refrigerator needs repairing, how does one know if the start relay needs to be replaced? The refrigerator compressor fan is an indispensable part of the system; you probably know that whenever you have any electric or electronic machine that works on a processor, the fan is necessary to cool the system down and prevent problems such as overheating. How To Test the Compressor Motor.

First of all plug out the fridge main electric plug.