Amana Refrigerator Compressor Overheating: Troubleshootin... | appliancefaults.com

Technical Background:

The Main Control Unit (MCU) in the Amana refrigerator sends a signal to the compressor relay, which then energizes the compressor. The compressor, along with the condenser fan, work to circulate refrigerant and dissipate heat. If the compressor is running continuously or struggling to pump refrigerant due to a restriction, it will overheat. Low voltage or a faulty start component can also cause overheating. The condenser fan needs 120V AC to operate.

Symptoms:

The homeowner observes that the Amana refrigerator compressor is extremely hot to the touch, but both the condenser fan and evaporator fan are running normally. The refrigerator may or may not be cooling effectively.

Possible Causes:

Refrigerant restriction in the sealed system.
Overcharge of refrigerant.
Faulty compressor start relay or capacitor.
Condenser coil is excessively dirty.
Compressor internal failure.
Voltage supply issues.

Solution:

1

Disconnect the Amana refrigerator from the 120V AC power supply and lock-out/tag-out the breaker.
2

Clean the condenser coils thoroughly using a condenser coil brush and vacuum.
3

Check the compressor start relay and capacitor using a multimeter. Replace if faulty.
4

Verify the voltage supply to the refrigerator at the outlet using a multimeter. It should read 120V AC +/- 10%.
5

If the above steps do not resolve the issue, suspect a sealed system problem. Contact a certified refrigeration technician to diagnose and repair the sealed system.
6

For sealed system diagnosis, a certified technician would use manifold gauges to check pressures and a leak detector to check for leaks. They might also use a clamp meter to measure compressor amp draw.
7

If the compressor is internally shorted or open, replace the compressor. Recover, evacuate and recharge the system according to EPA regulations.

Safety Warning:

Disconnect power before performing any repairs. Lock-out/Tag-out the breaker to prevent accidental energizing. Refrigerant handling requires EPA Section 608 certification. High voltage is present in the control panel and compressor area.

Prevention:

Clean the condenser coils at least twice a year. Ensure proper ventilation around the refrigerator. Avoid overloading the refrigerator with hot food.

Expert Tip:

Some Amana refrigerators have a service mode. Consult the service manual to access diagnostic codes and perform component tests. On some models, holding the door switch and freezer temperature down button simultaneously for 5 seconds will enter service mode.

Frequently Asked Questions

•How do I properly discharge the start capacitor before testing?

Use a 20,000-ohm resistor rated for at least 2 watts to discharge the capacitor. Connect the resistor leads across the capacitor terminals for several seconds.

•What are the typical refrigerant pressures I should expect to see on the high and low sides?

Typical low-side pressure ranges from 2-10 PSI, and high-side pressure ranges from 150-200 PSI, depending on the refrigerant type and ambient temperature. Consult the unit's service data for the specific refrigerant type and pressures.

•Where is the condenser coil located on my Amana refrigerator?

The condenser coil is typically located at the back of the refrigerator, either exposed or behind a cardboard panel. Some models have the condenser coils mounted underneath the refrigerator.

Amana Refrigerator Compressor Overheating: Troubleshooting Fan Issues

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I properly discharge the start capacitor before testing?

•What are the typical refrigerant pressures I should expect to see on the high and low sides?

•Where is the condenser coil located on my Amana refrigerator?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: