Amana Refrigerator Error Code Er: Communication Fault... | appliancefaults.com

Technical Background:

The "Er" error code on an Amana refrigerator indicates a communication failure between the main control board (which manages the compressor, defrost cycle, and other functions) and the display control board (which handles user interface and temperature settings). The main board sends data to the display board. A faulty connection or board can cause this disruption.

Symptoms:

The Amana refrigerator displays the error code "Er" on the control panel. The refrigerator may not be cooling properly, or the display may be unresponsive. Lights may flicker.

Possible Causes:

Loose wiring harness connections between the main control board and the display board.
Defective main control board.
Faulty display control board.
Damaged wiring harness or individual wires.
Power surge damaging one or both boards.
Software glitch requiring a reset or update.

Solution:

1

Disconnect the refrigerator from the power source. Locate the breaker in the breaker panel and turn it off.
2

Locate the main control board (usually at the back of the refrigerator behind an access panel) and the display control board (typically behind the front control panel).
3

Inspect the wiring harnesses connecting the two boards. Check for loose connections, damaged wires, or corrosion. Re-seat all connectors firmly.
4

Using a multimeter, test the voltage supply to both the main control board and the display board. Check for 120V AC at the input to the main board and the appropriate DC voltage outputs (typically 5V or 12V) to the display board. Consult the wiring diagram.
5

If voltage readings are incorrect, replace the main control board.
6

If voltage readings are correct and the wiring is intact, replace the display control board.
7

After replacing either board, reconnect the refrigerator to the power source and monitor for the error code. If the error persists, further diagnostics may be required.

Safety Warning:

Always disconnect the refrigerator from the power source before performing any repairs. Use Lock-Out/Tag-Out (LOTO) procedures to prevent accidental re-energizing of the circuit. Be aware of high voltage present on the main control board.

Prevention:

Use a surge protector to protect the refrigerator from power surges. Regularly inspect the wiring connections for any signs of damage or corrosion. Clean the coils at the back of the refrigerator every 6 months to improve efficiency and reduce strain on the components.

Expert Tip:

After replacing the control board, some models require a forced defrost cycle to recalibrate the system. Consult the service manual for instructions on entering service mode and initiating a defrost cycle. Often this involves pressing and holding specific buttons on the display simultaneously for 5-10 seconds.

Frequently Asked Questions

•Where can I find the wiring diagram for my Amana refrigerator model?

The wiring diagram is usually located behind the refrigerator, either taped to the back panel or inside the control panel compartment. You can also find it online at appliancepartspros.com or searspartsdirect.com by searching for your model number.

•How do I test the DC voltage output from the main control board to the display board?

Use a multimeter set to DC voltage. Refer to the wiring diagram to identify the correct pins on the wiring harness connector. Place the multimeter probes on the appropriate pins while the refrigerator is powered on (carefully!). The voltage should match the specifications in the wiring diagram (typically 5V or 12V DC).

•What is the part number for the main control board for my Amana refrigerator?

The part number depends on your specific Amana refrigerator model number. You can find the correct part number by searching online at appliancepartspros.com or searspartsdirect.com using your model number.

Amana Refrigerator Error Code Er: Communication Fault Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Where can I find the wiring diagram for my Amana refrigerator model?

•How do I test the DC voltage output from the main control board to the display board?

•What is the part number for the main control board for my Amana refrigerator?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: