24E
Samsung Refrigerator
Severity: ModerateWhat Does This Error Mean?
The 24E error on a Samsung refrigerator means the freezer defrost sensor is not working correctly. This sensor monitors the temperature of the evaporator coils during the defrost cycle. If it fails, the defrost heater cannot operate safely and ice builds up on the coils over time.
Affected Models
- RF23M8070SR
- RF28R7351SR
- RF27T5241SR
- RS27T5200SR
- Most Samsung French door and side-by-side models
Common Causes
- Freezer defrost sensor (thermistor) has failed or gone out of range
- Wiring harness connecting the sensor to the control board is damaged
- Defrost sensor is coated in heavy ice buildup, affecting its readings
- Defrost heater has burned out, meaning the defrost cycle never runs
- Control board fault causing it to misinterpret the sensor signal
How to Fix It
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Perform a manual defrost first — unplug the fridge and leave the freezer door open for 48 hours.
Place towels around the base and a pan inside to catch meltwater. Remove all frozen food to a cooler.
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After the freezer is fully defrosted and dry, plug the refrigerator back in.
Allow the fridge to run for 2–4 hours to reach operating temperatures before checking for the error.
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If the 24E error is gone, monitor daily for 1–2 weeks.
If ice builds up again and the error returns within days, the defrost sensor or heater is not working correctly.
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Try running a forced defrost cycle if your model supports it.
Unplug for 30 seconds, then hold the top-panel buttons while plugging back in to access diagnostic modes. Check your model's manual for the specific steps.
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If the error returns repeatedly, call a technician to test the defrost sensor, heater, and thermostat.
All three components work together. A failure in any one of them causes ice buildup and eventually a 24E error.
When to Call a Professional
Replacing a defrost sensor requires removing the freezer shelves and back panel to access the evaporator coils. This is a moderately complex repair. A technician can confirm which component is at fault and replace it. Expect repair costs of $130–$250.
Frequently Asked Questions
What is the defrost sensor and why is it important?
The defrost sensor watches the temperature of the evaporator coils during the automatic defrost cycle. It tells the defrost heater when to turn on and off. If it fails, either the heater never runs (ice buildup) or it runs too long (risk of damage).
Will my food spoil if I have a 24E error?
Not immediately. The fridge may still cool for a while even with a faulty defrost sensor. However, if ice builds up on the evaporator coils, air circulation slows and temperatures rise. Address this within a day or two to protect your food.
How do I know if my Samsung refrigerator's defrost heater is the problem?
If the freezer has heavy frost on the back wall within a few days of defrosting, the heater is likely not running. You can confirm this by running a forced defrost cycle — if the ice melts and comes back fast, the heater or sensor is faulty.