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Error code reference

Samsung Air Conditioner Error Code E313

SUMP TEMP FIXED 2 sensor error OPEN/SHORT

Samsung codesSamsung air conditioner codes
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What the E313 error code actually means

Your Samsung air conditioner has detected a problem with a temperature sensor located in the outdoor unit that monitors the base or sump area. The sensor is either completely disconnected or has a wiring fault, so the system cannot get an accurate reading and has shut down to protect itself. A technician will need to check the sensor connection and test the sensor with a meter to determine whether it needs to be replugged, repaired, or replaced.

Diagnostic procedure

The full E313 procedure

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1
First diagnostic step
Check if sensor connector is separated from PCB; measure resistance.
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Most common causes of E313

Ranked by how often they cause this code
  1. 1Disconnected sensor connector at PCB
  2. 2Failed NTC thermistor sensor
  3. 3Damaged sensor wiring harness
  4. 4Moisture or corrosion at connector terminals
  5. 5Faulty outdoor unit PCB

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Questions people ask about E313

What does E313 mean on a Samsung air conditioner?
E313 indicates an open or short circuit fault in the SUMP TEMP FIXED 2 sensor located in the outdoor unit. This sensor monitors the temperature of the sump or base pan area, and the error is triggered when outdoor temperatures are above -10°C, confirming the reading is a true fault rather than a low-temperature anomaly. The system shuts down normal operation to protect the unit until the sensor issue is resolved.
Will resetting the air conditioner clear the E313 error?
A power reset may temporarily clear the error display, but E313 will return as soon as the system attempts to read the faulty sensor again. The underlying issue, whether it is a disconnected connector, failed sensor, or damaged wiring, must be physically corrected before the error will stay cleared. Repeated resets without addressing the root cause will not restore normal operation.
How much does it cost to repair an E313 error on a Samsung air conditioner?
If the fix is simply reseating a loose connector, the cost is minimal and may only involve a service call fee, typically in the range of $75 to $150. If the sensor itself requires replacement, parts and labor combined generally range from $100 to $300 depending on the model and local labor rates. A wiring harness repair or PCB replacement would push costs higher, potentially into the $200 to $600 range.
Can I fix the E313 error code myself?
If the sensor connector has simply come loose from the control board, a knowledgeable DIYer can reseat it after disconnecting power to the unit. However, measuring thermistor resistance and replacing sensor components or wiring requires basic electrical tools and familiarity with air conditioner outdoor unit components. If you are not comfortable working inside the outdoor unit, a qualified technician should handle the diagnosis and repair.
Is it safe to run my Samsung air conditioner with the E313 error showing?
It is not recommended to continue operating the unit with E313 active. The sump temperature sensor provides data that the control system uses to manage defrost cycles and protect compressor components. Running the system without valid sensor input can result in inadequate protection against overheating or freezing conditions, potentially causing additional component damage.

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