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Error code reference

Samsung Refrigerator Error Code 24

FZ Defrost Function Error

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What the 24 error code actually means

Your Samsung refrigerator is displaying error code 24 because something went wrong with the system that melts frost inside the freezer. The refrigerator tried to run its defrost cycle for over 80 minutes without finishing, which triggered a safety shutoff. This usually points to a broken or disconnected heating element, a faulty sensor, or a loose wire in the freezer.

Diagnostic procedure

The full 24 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview
1
Confirm the fault
Power cycle the unit: switch off the breaker for 60 seconds, then restore power. If the code returns, the fault is persistent and the procedure below isolates the cause.
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Most common causes of 24

Ranked by how often they cause this code
  1. 1Failed Defrost Heater
  2. 2Defrost Thermostat or Thermal Limiter Failure
  3. 3Wiring Connector Separation or Corrosion
  4. 4Short Circuit in Heater Assembly
  5. 5Defective Main Control Board

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Questions people ask about 24

What does 24 mean on a Samsung refrigerator?
Error code 24 on a Samsung refrigerator indicates a Freezer Defrost Function Error. It means the freezer's defrost system failed to complete a defrost cycle within 80 minutes of continuous heater operation. The fault can involve the defrost heater, thermostat, thermal limiter, wiring connectors, or a short circuit in the heater assembly. The refrigerator triggers this code as a safety measure to prevent prolonged heater operation from causing damage.
Is it safe to use my Samsung refrigerator while error code 24 is displayed?
A refrigerator showing error code 24 has a compromised defrost system, which means frost will continue to build up on the evaporator coils. Over time, this frost accumulation will restrict airflow and cause the freezer and fresh food sections to warm up, putting food safety at risk. It is best to address the repair promptly rather than continuing to use the unit in a degraded state.
Will resetting my Samsung refrigerator clear error code 24?
Resetting the refrigerator by unplugging it for a few minutes may temporarily clear the error code from the display, but it will not fix the underlying problem. If the defrost heater, thermostat, or wiring is faulty, the defrost cycle will fail again and error code 24 will return. A reset is useful for ruling out a one-time control board glitch, but a recurring code 24 requires physical inspection and component testing to resolve.
Can I fix Samsung error code 24 myself?
Some causes of error code 24 are within reach of a confident DIYer. Checking and reseating wiring connectors in the defrost circuit requires no special tools and costs nothing. Testing the defrost heater and thermostat for continuity requires a basic multimeter. Replacing a defrost heater or thermostat is a moderate repair involving removing freezer panels, but it is manageable with the right preparation. Control board replacement is more complex and may warrant professional service.
How much does it cost to repair Samsung error code 24?
Repair costs depend on the failed component. A defrost heater or thermostat typically costs between $15 and $60 for the part, plus labor if you hire a technician. Professional diagnostic and repair service generally runs between $100 and $300 depending on your location and the technician's rates. A main control board, if that turns out to be the cause, is a more expensive repair with parts alone often ranging from $80 to $200 or more.

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