Amana Refrigerator Compressor Overheating and No... | appliancefaults.com

Technical Background:

The Main Control Unit (MCU) manages the compressor operation based on temperature sensor inputs. The MCU sends 120V AC to the compressor relay. The start relay and overload protect the compressor. If the MCU, relay, or sensors fail, or if refrigerant issues exist, the compressor may overheat.

Symptoms:

The homeowner observes that the refrigerator compressor is excessively hot to the touch. The refrigerator is not cooling, and food is spoiling. There may be no unusual noises, or the compressor might be clicking on and off.

Possible Causes:

Failed compressor start relay/overload.
Locked rotor compressor.
Refrigerant leak.
Clogged condenser coils.
Defective electronic control board (MCU).
Blocked or restricted refrigerant lines.

Solution:

1

Disconnect power to the refrigerator at the breaker panel.
2

Locate the compressor and check the start relay/overload. Use a multimeter to test for continuity. Replace if defective.
3

Inspect the condenser coils (typically at the back or bottom) for dirt and debris. Clean thoroughly with a brush and vacuum.
4

Use a manifold gauge set to check the refrigerant pressures. Low pressure indicates a leak. If a leak is suspected, contact a certified technician to locate and repair the leak, then recharge the system.
5

If the compressor is suspected to be locked, a hard start kit may temporarily resolve the issue, but replacement is often the most reliable long-term fix.
6

Check the voltage to the compressor using a multimeter. Verify you have 120V AC. A low voltage supply can cause compressor overheating.
7

Inspect the electronic control board (MCU) for burned components or signs of damage. Replace if necessary.

Safety Warning:

Always disconnect power to the refrigerator at the breaker panel before performing any repairs. Refrigerant systems contain high pressure. Only certified technicians should handle refrigerant. High voltage is present; use caution when testing electrical components. Lock Out / Tag Out (LOTO) procedures are mandatory.

Prevention:

Clean the condenser coils every 6 months using a brush and vacuum. Ensure proper ventilation around the refrigerator. Avoid overloading the refrigerator with food, which can strain the cooling system.

Expert Tip:

Some Amana models have a diagnostic mode accessible by pressing and holding specific buttons on the control panel. Consult the service manual for the exact sequence for your model. This can reveal error codes and sensor readings.

Frequently Asked Questions

•How do I access the compressor start relay/overload?

The start relay/overload is typically located in a housing attached directly to the compressor. You may need a 1/4-inch nut driver to remove the cover. Be sure to disconnect power first!

•What refrigerant type does my Amana refrigerator use, and where can I find that information?

The refrigerant type is usually listed on a sticker near the compressor or inside the refrigerator compartment. Common refrigerants include R134a and R600a. Never mix refrigerants.

•If the compressor is running, but still hot, what could be the problem?

If the compressor is running hot, but not cooling, it could indicate a failing compressor, a refrigerant restriction, or a refrigerant leak that has reduced the system charge. A refrigerant pressure test is necessary.

Amana Refrigerator Compressor Overheating and No Cooling: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the compressor start relay/overload?

•What refrigerant type does my Amana refrigerator use, and where can I find that information?

•If the compressor is running, but still hot, what could be the problem?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: