GE Refrigerator dE Error: Defrost Heater and Thermostat... | appliancefaults.com

Technical Background:

The 'dE' error code typically indicates a defrost error. The Main Control Board (MCB) monitors the defrost circuit. It sends 120V AC to the defrost heater to melt frost buildup. The defrost thermostat acts as a safety switch, preventing the heater from overheating. If the MCB does not sense a change in temperature or current within a specified time during the defrost cycle, it throws the 'dE' error.

Symptoms:

The US homeowner may observe that their GE refrigerator is not cooling properly, especially in the freezer section. Ice buildup may be excessive on the back wall of the freezer. The 'dE' error code is displayed on the control panel.

Possible Causes:

Defective defrost heater
Faulty defrost thermostat (bi-metal switch)
Wiring harness issue in the defrost circuit
Damaged Main Control Board (MCB)
Ice buildup preventing proper defrost operation

Solution:

1

Unplug the refrigerator or turn off the breaker at the breaker panel.
2

Locate the defrost heater and thermostat, usually behind the back panel inside the freezer compartment. Remove the panel using a 1/4-inch nut driver.
3

Using a multimeter set to continuity, test the defrost heater. Disconnect one wire from the heater. A reading of OL (open loop) indicates a failed heater. Replace if necessary.
4

Check the defrost thermostat for continuity. It should only have continuity when cold (below approximately 40°F). Use ice water to chill the thermostat before testing. If it reads open when cold, replace it.
5

Inspect the wiring harness for any signs of damage, such as frayed wires or loose connections. Repair or replace as needed. Use wire strippers and crimpers for repairs.
6

If the heater and thermostat test good and the wiring is intact, the Main Control Board (MCB) may be faulty. Verify the MCB is sending 120V AC to the defrost heater during a defrost cycle (requires knowledge of service mode). Replacement may require licensed technician assistance.
7

After repairs, plug the refrigerator back in or turn the breaker back on.

Safety Warning:

Always disconnect power to the refrigerator before performing any repairs. Use proper Lock-Out/Tag-Out (LOTO) procedures to prevent accidental re-energizing of the circuit. High voltage is present in the control system; exercise caution.

Prevention:

Regularly check the door seals to ensure a tight seal, preventing excessive frost buildup. Avoid overpacking the freezer, which can restrict airflow and contribute to frost formation.

Expert Tip:

On some GE models, you can manually initiate a defrost cycle through the service mode. Press and hold the 'Freezer' and 'Light' buttons simultaneously for 5 seconds to enter service mode, then use the buttons to navigate to the defrost test. This can help confirm if the defrost system is functioning correctly.

Frequently Asked Questions

•How do I access the service mode on my specific GE refrigerator model?

The service mode entry varies by model. Consult the technical service documentation for your specific model. Searching online with your model number and 'service mode' often provides the correct sequence.

•What is the proper resistance reading for a GE defrost heater?

The resistance value varies, but typically falls between 20-50 ohms. An open circuit (OL) indicates a failed heater. A short circuit (0 ohms) can indicate a different problem.

•Where can I purchase replacement parts for my GE refrigerator?

You can purchase replacement parts from authorized GE appliance parts distributors, online retailers specializing in appliance parts, or local appliance repair shops. Be sure to have your model number handy to ensure you order the correct parts.

GE Refrigerator dE Error: Defrost Heater and Thermostat Testing Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the service mode on my specific GE refrigerator model?

•What is the proper resistance reading for a GE defrost heater?

•Where can I purchase replacement parts for my GE refrigerator?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: