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Error code reference

Samsung Air Conditioner Error Code 33

Abnormal increase of OLP temperature (comp top OLP temperature trip).

Samsung codesSamsung air conditioner codes

Abnormal increase of OLP temperature (comp top OLP temperature trip).

First step from the service manual

Check ventilation around outdoor unit; check refrigerant level; check if compressor is locked.

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

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What 33 means on a Samsung air conditioner

Error code 33 on a Samsung air conditioner signals an abnormal temperature rise at the OLP (overload protector) located at the top of the compressor. The OLP is a thermal protection device that monitors compressor operating temperature and trips when that temperature exceeds a safe threshold. When the unit logs this fault, it means the compressor top surface has reached a temperature high enough to trigger the protector, forcing the system to shut down to prevent compressor damage or failure.

The most common root causes fall into three categories: inadequate heat rejection, refrigerant system issues, and mechanical compressor faults. Poor ventilation around the outdoor unit traps heat and prevents the condenser from shedding load efficiently, which forces the compressor to work harder and run hotter. Low refrigerant charge reduces the cooling effect on the compressor and raises compression ratios, also driving up discharge and compressor surface temperatures. A locked or seized compressor draws excessive current and generates extreme heat almost immediately after startup.

Diagnosing this fault requires checking outdoor unit airflow clearances and condenser coil cleanliness first, since these are non-invasive checks. If airflow is adequate, a refrigerant pressure check under operating conditions will reveal undercharge or restriction. If pressures are within range but the compressor surface still overheats rapidly, the compressor itself should be checked for locked rotor condition by measuring current draw at startup and comparing to rated FLA. A seized compressor will typically draw locked rotor amperage and will not develop suction or discharge pressure.

Source: manufacturer service documentation.

Common causes of 33

  1. 01

    Restricted airflow around the outdoor unit

    Wiring / connection

    Blocked or insufficient clearance around the outdoor unit prevents heat from dissipating through the condenser coil, causing compressor temperatures to rise. Check for debris, overgrown vegetation, fencing, or other obstructions within the required clearance area around the unit.

  2. 02

    Low refrigerant charge

    Part replacement

    An undercharged system raises the compression ratio and reduces the refrigerant gas cooling effect on the compressor, causing the compressor body to overheat. This condition requires manifold gauge readings to confirm and must be addressed by a licensed technician.

  3. 03

    Dirty or fouled condenser coil

    Wiring / connection

    A condenser coil clogged with dirt, dust, or debris cannot transfer heat efficiently, raising system head pressure and compressor operating temperature. Inspect the coil surface and clean if necessary using appropriate coil cleaner and low-pressure rinsing.

  4. 04

    Locked or seized compressor

    Part replacement

    A mechanically locked compressor cannot rotate freely, causing it to draw locked rotor amperage and generate extreme heat within seconds of a startup attempt. This is identified by measuring current draw at startup and confirming no suction or discharge pressure is developing.

  5. 05

    Faulty OLP sensor or wiring

    Part replacement

    If the overload protector itself is defective or its wiring harness has a fault, it may report a temperature trip condition even when actual compressor temperatures are within normal limits. This should be considered after all other causes have been ruled out.

See the test procedure for each cause

Frequently asked questions about 33

What does 33 mean on a Samsung air conditioner?
Error code 33 on a Samsung air conditioner indicates an abnormal rise in OLP temperature at the top of the compressor, causing the overload protector to trip and shut the system down. The OLP is a safety device designed to prevent compressor damage from overheating. This fault can be caused by poor outdoor unit ventilation, low refrigerant, a dirty condenser coil, or a mechanically seized compressor.
Can I fix error code 33 on my Samsung air conditioner myself?
Some causes of error code 33 can be addressed without a technician, including clearing debris or obstructions from around the outdoor unit and cleaning a dirty condenser coil. However, refrigerant diagnosis and recharge require licensed HVAC equipment and certification, and a locked compressor requires professional evaluation and likely component replacement. Start with the non-invasive checks before calling a technician.
Is it safe to keep running my Samsung air conditioner when error code 33 appears?
No, you should not attempt to force the system to run while error code 33 is active. The fault indicates the compressor is overheating, and continued operation under these conditions can cause permanent compressor failure. Allow the unit to cool down before any restart attempt, and address the underlying cause before returning the system to service.
Will resetting my Samsung air conditioner clear error code 33?
A power reset may temporarily clear the fault and allow a restart if the compressor has cooled sufficiently, but the error will return if the underlying cause is not corrected. Repeatedly resetting the unit without addressing the root cause risks shortening compressor life or causing complete compressor failure. Treat the code as a warning that requires investigation, not just a reset.
How much does it cost to repair a Samsung air conditioner showing error code 33?
Repair costs vary widely depending on the cause. Cleaning the condenser coil or clearing airflow obstructions may cost little to nothing if done yourself, or between $75 and $200 if performed by a technician. Refrigerant recharge typically ranges from $150 to $400 depending on refrigerant type and the amount needed. Compressor replacement is the most expensive scenario and can range from $600 to $1,500 or more, including parts and labor.

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