GE · Refrigerator

dH

Defrost Heater Failure

Severity

Medium

The error code dH on your GE Refrigerator indicates a specific system failure categorized as "Defrost Heater Failure". This guide walks you through the most likely causes and the correct repair sequence.

Owner's Summary

Your GE refrigerator's automatic defrost heater has failed, allowing frost to build up excessively on the cooling coils and block airflow. A full manual defrost is the free first troubleshooting step before replacing the heater element.

Symptoms

GE refrigerator excessive ice buildup on coils, dH error code

Common Causes

Defrost heater open circuit
Defrost thermostat failure
Defrost timer or control board fault
Heavy ice preventing proper defrost cycle

How to Fix

1 Unplug unit and manually defrost for 24-48 hours
2 Test defrost heater continuity with a multimeter
3 Test defrost thermostat for proper operation
4 Replace defrost heater if open circuit is confirmed

Tools You'll Need

Multimeter

These are simple, low-risk fixes most homeowners can do with tools already in a basic toolbox.

Technical Explanation

The defrost heater periodically melts accumulated frost on the evaporator coil on a timer-controlled schedule. dH indicates a fault in this heating circuit, typically detected via an open circuit reading or failure to reach expected defrost temperature within the cycle window.

Is It Safe to Keep Using?

Food safety risk if cooling becomes significantly impaired by ice blockage. Address within a few days.

Technician's Pro Tip

After a full manual defrost, monitor the unit closely over the following days — if ice returns quickly in the same location, this confirms the heater itself rather than just an isolated heavy ice event.

Related Codes

E11 — GE Washing Machine

Water Fill Issue

High

E21 — GE Washing Machine

Slow Drain or Drain Fault

High

E31 — GE Washing Machine

Pressure Sensor Fault

Medium

Frequently Asked Questions

What does error code dH mean on a GE Refrigerator?

Code dH on a GE Refrigerator indicates "Defrost Heater Failure." In practice, the most common trigger is defrost heater open circuit. Severity is rated medium, and typical repair costs range from $20 to $220.

Can I fix dH myself, or do I need a technician?

Many cases of dH can be resolved without a technician. The first step to try: unplug unit and manually defrost for 24-48 hours. If that doesn't clear the code, work through the remaining steps in the "How to Fix" section above before assuming a part needs replacing.

Is it safe to keep using my refrigerator with code dH showing?

Food safety risk if cooling becomes significantly impaired by ice blockage. Address within a few days.

How much does it cost to repair dH on a GE Refrigerator?

Repair costs for code dH typically range from $20 to $220. Defrost heater: $40–$120; Defrost thermostat: $15–$40; Labor: $80–$220. Costs on the low end usually reflect a DIY fix with no parts required, while the high end reflects a part replacement plus professional labor.

Estimated Repair Cost USD

$20 – $220

Defrost heater: $40–$120; Defrost thermostat: $15–$40; Labor: $80–$220