Frigidaire Refrigerator Compressor Overheating & No... | appliancefaults.com

Technical Background:

The main control unit (MCU) sends a signal to the compressor relay to start the compressor. The compressor relies on proper start windings, run windings, and refrigerant flow to cool itself. A thermal overload protects the compressor from overheating. Voltage paths include 120V AC to the control board, then to the compressor relay, and finally to the compressor itself. The condenser fan provides cooling to the compressor.

Symptoms:

The homeowner reports that the Frigidaire refrigerator is not cooling, and the compressor is very hot to the touch. There is no unusual noise besides the heat, and the refrigerator is plugged into a functioning outlet.

Possible Causes:

Faulty start relay or overload
Failed compressor windings
Locked rotor condition
Refrigerant leak or restriction
Condenser fan motor failure
Defective main control board

Solution:

1

Unplug the refrigerator and verify voltage at the outlet (120V AC) with a multimeter.
2

Inspect the condenser fan motor. If it's not running, test the motor windings for continuity with a multimeter. Replace if defective.
3

Check the start relay and overload. If burned or cracked, replace with a new matching part.
4

Use a process valve to install gauge manifold to compressor and check system pressures. If pressures indicate a leak or sealed system restriction, contact a certified refrigeration technician.
5

If the compressor still does not start, and is hot, measure the compressor windings for continuity and shorts to ground using a multimeter. If windings are bad, replace the compressor.
6

Inspect the main control board for burned components or damage. Replace if necessary.
7

After any repairs, ensure proper refrigerant charge using a digital scale and weighing in correct charge.

Safety Warning:

Always disconnect power to the appliance before performing any repairs. Use Lock-Out/Tag-Out (LOTO) procedures. Be aware of high voltage components inside the refrigerator. Refrigerant handling requires EPA Section 608 certification.

Prevention:

Clean the condenser coils every 6 months with a vacuum cleaner and brush attachment. Ensure proper ventilation around the refrigerator. Avoid overloading the refrigerator, which can cause the compressor to work harder. Regularly check door seals for proper sealing.

Expert Tip:

Many Frigidaire refrigerators have a service mode. To access it, simultaneously press and hold the up and down temperature adjustment buttons for 5 seconds. This can provide diagnostic codes and allow you to manually activate components for testing.

Frequently Asked Questions

•How do I safely discharge the refrigerant before replacing the compressor?

Refrigerant must be recovered by a certified technician using EPA-approved recovery equipment. Do not vent refrigerant into the atmosphere.

•What type of refrigerant does my Frigidaire refrigerator use, and where can I find the specifications?

The refrigerant type is usually listed on a sticker near the compressor or on the refrigerator's data plate. Common refrigerants include R134a and R600a. Refer to the service manual for the exact specification.

•What is the proper way to test the compressor windings for a short to ground?

Set your multimeter to the continuity or resistance setting. Place one probe on a compressor terminal and the other on the bare metal frame of the compressor. If you get a reading of continuity or very low resistance (near 0 ohms), the windings are shorted to ground, indicating a failed compressor.

Frigidaire Refrigerator Compressor Overheating & No Cooling: Diagnosis & Fix

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I safely discharge the refrigerant before replacing the compressor?

•What type of refrigerant does my Frigidaire refrigerator use, and where can I find the specifications?

•What is the proper way to test the compressor windings for a short to ground?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: