GE Refrigerator Error Code H vs HI: Troubleshooting and... | appliancefaults.com

Technical Background:

The main control unit (MCU) monitors the refrigerator and freezer thermistors. These thermistors are variable resistors that change resistance based on temperature. The MCU reads the voltage drop across these thermistors. If the voltage is out of range (high resistance indicating high temperature), the MCU will display the H or HI error code. The 'HI' code generally indicates a more severe high-temperature condition than the 'H' code.

Symptoms:

The H error code on a GE refrigerator generally indicates a problem with the refrigerator compartment temperature sensor, while the HI error usually means the temperature in the refrigerator is abnormally high. Homeowners may notice the refrigerator is not cooling properly, food is spoiling faster than usual, or the display constantly shows the H or HI error.

Possible Causes:

Faulty thermistor or thermistor wiring
Defective main control board (MCU)
Airflow obstruction in the freezer or refrigerator compartment
Evaporator fan motor failure
Damper control malfunction
Software glitch requiring a reset

Solution:

1

Unplug the refrigerator or turn off the breaker. Allow 5 minutes for reset.
2

Locate the freezer and refrigerator compartment thermistors. Use a multimeter to check their resistance. At 77°F, a typical thermistor reads around 5k ohms. Replace if readings are significantly off.
3

Inspect the wiring harness connected to the thermistors for damage or loose connections. Repair or replace as needed.
4

Verify the evaporator fan motor is running and not obstructed. If the fan is not running, test the motor with a multimeter for continuity. Replace if faulty.
5

Check the damper control to ensure it is opening and closing properly. Manually actuate the damper and observe its movement. Replace if the damper is stuck or broken.
6

Access the main control board (MCU) and inspect for any visible signs of damage, such as burnt components. If damage is evident, replace the control board.
7

After completing repairs, plug the refrigerator back in or turn on the breaker. Monitor the temperature and ensure the error code is cleared.

Safety Warning:

Always disconnect the power to the refrigerator at the breaker panel before performing any repairs. Use Lock-Out Tag-Out (LOTO) procedures. Some components may retain a high voltage charge even after disconnection. Exercise caution when working with electrical components.

Prevention:

Regularly clean the condenser coils located at the back or bottom of the refrigerator. Ensure proper airflow around the refrigerator. Avoid overfilling the refrigerator, as this can restrict airflow.

Expert Tip:

Some GE refrigerators have a service mode that allows you to manually run diagnostics and test components. Consult the service manual for your specific model for instructions on accessing and using the service mode. Often, holding the freezer and refrigerator temp adjustment buttons simultaneously for 10 seconds will initiate it.

Frequently Asked Questions

•How do I find the service manual for my specific GE refrigerator model?

You can usually find the service manual online by searching for your model number followed by 'service manual.' Many appliance parts websites offer downloadable service manuals. You can also contact GE directly for assistance.

•What if the thermistor readings are within the expected range, but the error code persists?

If the thermistor readings are accurate, the issue is likely with the wiring or the main control board. Check the wiring harness for continuity and shorts. If the wiring is good, the main control board is the most likely culprit and should be replaced.

•How do I safely discharge a capacitor on the main control board before replacing it?

Before handling the main control board, unplug the refrigerator and wait at least 5 minutes to allow capacitors to discharge. Use a 20k ohm 2-watt resistor to discharge any remaining voltage from the capacitor by connecting the resistor leads to the capacitor terminals. Wear safety glasses and insulated gloves.

GE Refrigerator Error Code H vs HI: Troubleshooting and Differences

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I find the service manual for my specific GE refrigerator model?

•What if the thermistor readings are within the expected range, but the error code persists?

•How do I safely discharge a capacitor on the main control board before replacing it?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: