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Error code reference

Samsung Air Conditioner Error Code 13

Abnormal increase of OLP temperature (OLP sensor temperature trip).

Samsung codesSamsung air conditioner codes

Abnormal increase of OLP temperature (OLP sensor temperature trip).

First step from the service manual

Check outdoor unit ventilation and installation; check if refrigerant is insufficient; check compressor and fan motor.

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

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What 13 means on a Samsung air conditioner

Error code 13 on a Samsung air conditioner indicates an abnormal increase in OLP (Over Load Protector) temperature, triggering a thermal protection trip. The OLP is a safety device mounted on or near the compressor that monitors operating temperature and cuts power to the compressor when temperatures reach dangerous levels. When the sensor detects temperatures exceeding the safe threshold, the system shuts down the compressor to prevent permanent damage and triggers this error code.

The most common causes of this fault are related to heat dissipation failures in the outdoor unit. Restricted airflow around the outdoor unit, whether from debris, overgrown vegetation, or improper installation clearances, causes heat to build up around the compressor and OLP sensor. Insufficient refrigerant charge is another primary cause, as low refrigerant forces the compressor to work harder and run hotter than designed operating conditions allow. In both cases, the compressor is subjected to thermal stress that the OLP is specifically designed to detect and respond to.

Fan motor faults in the outdoor unit can also trigger this error, since the condenser fan is responsible for drawing air across the coil and dissipating heat from the refrigerant circuit. A fan motor running at reduced speed or failing intermittently will reduce heat rejection capacity and cause compressor and OLP temperatures to climb. Less commonly, a failing compressor with internal mechanical wear may draw excessive current and generate abnormal heat even under normal ambient and refrigerant conditions.

Source: manufacturer service documentation.

Common causes of 13

  1. 01

    Restricted outdoor unit airflow

    Wiring / connection

    Debris, dirt buildup on the condenser coil, or insufficient clearance around the outdoor unit prevents heat dissipation, causing OLP temperature to rise. Inspect the unit for blocked grilles, dirty coils, or objects placed too close to the cabinet.

  2. 02

    Insufficient refrigerant charge

    Part replacement

    Low refrigerant forces the compressor to operate under excessive load and elevated temperatures, triggering the OLP trip. This requires a licensed technician to measure system pressures and recharge the refrigerant.

  3. 03

    Outdoor fan motor failure or reduced speed

    Part replacement

    A faulty condenser fan motor that runs slowly or intermittently reduces heat rejection from the outdoor coil, causing system temperatures to climb beyond OLP limits. Check that the fan blade spins freely and the motor runs at full speed during operation.

  4. 04

    Faulty OLP sensor

    Part replacement

    The OLP sensor itself may have drifted out of calibration or failed, causing it to report a thermal trip even when actual temperatures are within normal range. This is diagnosed after ruling out airflow, refrigerant, and mechanical issues.

  5. 05

    Compressor mechanical wear or failure

    Part replacement

    A worn or failing compressor may draw excessive current and generate abnormal internal heat even when refrigerant levels and airflow are adequate. This typically presents alongside other compressor-related symptoms such as unusual noise or hard starting.

See the test procedure for each cause

Frequently asked questions about 13

What does 13 mean on a Samsung air conditioner?
Error code 13 on a Samsung air conditioner indicates that the Over Load Protector (OLP) temperature has risen abnormally and triggered a thermal protection shutdown. The OLP is a safety device located near the compressor that cuts power when operating temperatures become dangerously high. The most common causes are restricted outdoor airflow, low refrigerant, and outdoor fan motor problems. The system will not resume normal operation until the underlying cause is identified and corrected.
Can I fix error code 13 on my Samsung air conditioner myself?
Some causes of error code 13 can be addressed without a technician. You can clear debris from around the outdoor unit, clean dirty condenser coil fins, and make sure adequate clearance exists on all sides of the cabinet. However, if the issue involves low refrigerant, a faulty fan motor, a defective OLP sensor, or a failing compressor, a qualified HVAC technician will be required to complete the repair safely.
Is it safe to keep running my Samsung air conditioner when error code 13 appears?
No, you should not attempt to bypass or ignore error code 13. The system has shut down specifically to protect the compressor from heat damage, and continued operation under the fault condition could cause permanent compressor failure, which is one of the most expensive repairs on any air conditioning system. Allow the unit to cool down and have the cause diagnosed before restarting.
Will resetting my Samsung air conditioner clear error code 13?
Resetting the unit may temporarily clear the error and allow the system to restart, especially if the OLP tripped due to a brief high-temperature event that has since resolved. However, if the underlying cause such as low refrigerant, blocked airflow, or a failing fan motor is still present, the error will return and the system will shut down again. Resetting without addressing the root cause risks compressor damage.
How much does it cost to repair a Samsung air conditioner showing error code 13?
Repair costs vary significantly depending on the cause. Cleaning and clearing airflow restrictions may cost between $75 and $200 for a service call. Refrigerant recharge typically ranges from $150 to $400 depending on the refrigerant type and the amount needed. Fan motor replacement generally falls between $200 and $450 including parts and labor. Compressor replacement is the most expensive outcome, often ranging from $800 to $2,000 or more depending on the unit size and model.

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