Error Code Explained
What Does the Samsung E-23 Error Code Mean?
The E-23 error code on a Samsung microwave indicates a short circuit fault in the cavity thermistor — the temperature sensor that monitors the interior cooking cavity. E-23 is the short-circuit counterpart to E-14 (open circuit). Where E-14 means the thermistor resistance is too high (open circuit — no signal), E-23 means the thermistor resistance has dropped near zero (short circuit — continuous signal at maximum).
Both E-23 and E-14 disable any cooking programs that rely on cavity temperature sensing. However, E-23 is more operationally disruptive because a shorted thermistor reads the cavity as perpetually overheated, which can cause the control board to block all cooking cycles rather than just sensor-based ones.
Root Causes
Common Causes of the Samsung E-23 Error Code
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1Shorted Cavity ThermistorThe thermistor element has internally shorted, causing its resistance to read near zero. The control board interprets this as an extreme temperature and may halt operation.
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2Moisture Damage to ThermistorCondensation or steam infiltration has created a conductive path across the thermistor terminals, artificially reducing its resistance reading.
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3Wiring Short Between Thermistor LeadsThe thermistor wire harness has chafed against a metal surface, creating a short circuit external to the thermistor component itself.
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4Overheating Event Damaging ThermistorA prior severe overheating event (from arcing, running empty, or ventilation failure) has physically damaged the thermistor, causing it to short.
Step-by-Step Guide
How to Troubleshoot the E-23 Error Code
Safety First: Always disconnect the Microwave from power before inspecting any internal components. Do not attempt electrical repairs. If in doubt, call a certified technician.
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1Power reset after coolingUnplug the microwave for 10 minutes and allow it to cool to room temperature. Restore power and test manual cooking. If E-23 was caused by temporary moisture contact, it may not return.
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2Test manual time cookingEnter a cooking time and power level manually. If the microwave refuses to start any cooking cycle (not just sensor modes), the shorted thermistor is feeding a false overtemperature reading that is blocking all operation — professional repair is required.
Professional Service
When to Call a Samsung Technician
E-23 requires a technician to discharge the internal high-voltage capacitor, locate the cavity thermistor, and test the component and its wiring. The thermistor is a low-cost part but its replacement is an internal repair requiring proper capacitor discharge procedures.
FAQ
Frequently Asked Questions — Samsung E-23
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E-14 means the cavity thermistor has an open circuit (infinite or very high resistance — no signal reaches the board). E-23 means the thermistor has a short circuit (near-zero resistance — continuous maximum signal). Both indicate thermistor failure, but E-23 may be more disruptive because a shorted sensor can trick the board into thinking the cavity is overheated.
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It depends on the model — some Samsung microwaves will allow manual time cooking even with a thermistor fault, while others block all operation when the thermistor reads as shorted. If manual cooking works, the unit is usable until repaired. If no cooking modes function, the microwave must be repaired before use.
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The E-23 fault itself is not immediately dangerous — it is a sensor reporting incorrectly. However, if the thermistor was damaged by an overheating event, using the microwave before repairing it risks recurring overheating. Have the unit inspected if E-23 appeared after any burning smell or arcing incident.
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