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Error code reference

GE Refrigerator Error Code F304

Freezer temperature exceeded 72.5°F

GE codesGE refrigerator codes

Freezer temperature exceeded 72.5°F. Sets if defrost has not run for 1 hour, doors closed for 1 hour, and FZ temp is above 20°F.

First step from the service manual

Check sealed system operation, compressor, fans, and thermistors.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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  • Step-by-step tests with expected resistance, voltage, and continuity values
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What F304 means on a GE refrigerator

The F304 error code on a GE refrigerator indicates that the freezer compartment temperature has exceeded 72.5°F. This is a conditional fault, meaning the control board only sets this code when three specific criteria are met simultaneously: defrost has not run within the past hour, the freezer door has been closed for at least one hour, and the freezer temperature is reading above 20°F. This combination tells the control board that the freezer is genuinely warm rather than warm due to an open door or an active defrost cycle.

The most common system failures behind F304 involve the sealed refrigeration system or the components that support it. A failing compressor, a refrigerant leak, or a restriction in the sealed system can all prevent the freezer from reaching and holding proper temperatures. Evaporator and condenser fans must also be operating correctly to circulate air and reject heat. If either fan motor has failed or is obstructed, cooling capacity drops significantly. Thermistors are also a key factor since inaccurate temperature sensor readings can cause the control board to misinterpret actual conditions.

Diagnosis should begin with a full check of sealed system operation, including listening for compressor start and run cycles, verifying condenser fan and evaporator fan operation, and measuring thermistor resistance values against the expected temperature-to-resistance curve. A thermistor reading outside the expected range at a known temperature points to a sensor fault rather than a true cooling failure. If the fans and sensors check out, sealed system evaluation by a certified technician is the appropriate next step.

Source: manufacturer service documentation.

Common causes of F304

  1. 01

    Compressor failure or weak compressor

    Part replacement

    A compressor that is not starting, not running continuously, or running but not pumping refrigerant effectively will cause freezer temperatures to rise. Listen for the compressor cycling and check if the compressor body is getting warm during a run cycle.

  2. 02

    Evaporator or condenser fan motor failure

    Part replacement

    If the evaporator fan inside the freezer or the condenser fan near the compressor has stopped running, heat transfer breaks down and temperatures rise. Manually spin each fan blade to check for binding and listen for the motors running during a cooling cycle.

  3. 03

    Faulty freezer thermistor

    Part replacement

    A thermistor that is reading inaccurately can either mask an actual temperature problem or trigger a false F304 fault. Measure thermistor resistance and compare it to the expected resistance at the current freezer temperature to determine if the sensor is out of spec.

  4. 04

    Refrigerant leak or sealed system restriction

    Part replacement

    A leak or blockage in the sealed system reduces or eliminates the refrigerant flow needed for cooling. Signs include frost patterns limited to one section of the evaporator, warm discharge air, or a compressor that runs continuously without cooling.

  5. 05

    Heavy frost buildup on evaporator coils

    Wiring / connection

    If the defrost system has partially failed over time, excessive frost accumulation on the evaporator can block airflow and reduce cooling even when the compressor is working correctly. Check for a solid block of ice around the evaporator coils behind the freezer back panel.

See the test procedure for each cause

Frequently asked questions about F304

What does F304 mean on a GE refrigerator?
F304 means the freezer temperature has exceeded 72.5°F under conditions where it should be cooling normally. The code is set only when the freezer door has been closed for at least one hour, defrost has not run in the past hour, and the freezer is reading above 20°F. This points to a genuine cooling failure rather than a temporary temperature spike from an open door or a defrost cycle.
Can I fix F304 myself or do I need a technician?
Some causes of F304 are accessible to a knowledgeable DIYer, such as checking fan operation, clearing frost buildup from evaporator coils, or testing and replacing a thermistor. However, if the sealed refrigeration system is involved, including a refrigerant leak or compressor failure, a certified technician with proper equipment is required by law to handle refrigerants.
Is it safe to keep food in the refrigerator when F304 is showing?
No, it is not safe to assume frozen food is still properly stored when this code appears. The F304 code indicates the freezer has reached temperatures above 72.5°F, which is far above safe frozen food storage temperatures. Check the actual temperature inside the freezer and move perishables to another freezer or add ice if the unit cannot be repaired quickly.
Will resetting the refrigerator clear the F304 code?
A power reset may temporarily clear the fault display, but the code will return if the underlying problem has not been corrected. Because the code sets based on specific conditions including temperature, door position, and defrost timing, the control board will detect the fault again once those conditions are met. Clearing the code without fixing the cause does not restore proper freezer operation.
How much does it cost to repair a GE refrigerator showing F304?
Repair costs depend heavily on which component has failed. Thermistor replacement is typically on the lower end, ranging from around $50 to $150 including parts and labor. Fan motor replacement generally falls in the $100 to $250 range. Compressor replacement or sealed system repair is significantly more expensive, often ranging from $400 to $700 or more depending on the model and local labor rates.

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