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Error code reference

Samsung Air Conditioner Error Code P2

SUMP COMP DOWN

Samsung codesSamsung air conditioner codes

SUMP COMP DOWN - system down due to condenser temperature reaching 95°C (6 detections).

First step from the service manual

Check for obstacles at air inlet/outlet of outdoor unit, then check fan motor capacitor and wiring.

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

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What P2 means on a Samsung air conditioner

The Samsung P2 error code indicates a compressor shutdown triggered by excessive condenser temperature. Specifically, the system monitors the condenser coil temperature and initiates a protective shutdown once that temperature reaches 95°C across six consecutive detections. This threshold-based detection method is designed to prevent compressor damage from sustained overheating rather than brief spikes, meaning the fault represents a persistent thermal condition, not a momentary anomaly.

The most likely root cause is restricted airflow through the outdoor unit. Blocked air inlets or outlets, whether from debris, vegetation, or improper clearance around the unit, prevent adequate heat dissipation from the condenser coil. When heat cannot escape efficiently, coil temperatures climb until the thermal protection activates. The fan motor and its capacitor are also primary suspects: a failing run capacitor can cause the outdoor fan to spin slowly or intermittently, sharply reducing airflow even when no physical blockage is present. Wiring faults to the fan motor can produce the same symptom.

Diagnosis should begin with a visual inspection of all air inlet and outlet paths on the outdoor unit, clearing any obstructions. After confirming adequate clearance, the fan motor capacitor should be tested for correct capacitance and the motor wiring checked for damaged insulation, loose terminals, or corrosion. If airflow and the fan circuit test normal, further investigation into refrigerant charge level and condenser coil cleanliness may be warranted, as low refrigerant or a fouled coil can also elevate condenser temperatures significantly.

Source: manufacturer service documentation.

Common causes of P2

  1. 01

    Blocked air inlet or outlet on outdoor unit

    Wiring / connection

    Debris, overgrown vegetation, or objects placed too close to the outdoor unit restrict the airflow needed to release heat from the condenser coil. Inspect all sides of the outdoor unit for obstructions and verify adequate clearance on all sides.

  2. 02

    Failed or weak fan motor capacitor

    Part replacement

    A degraded run capacitor causes the outdoor fan motor to spin at reduced speed or fail to start, dramatically reducing condenser airflow. The capacitor should be tested with a capacitance meter and replaced if the reading falls outside its rated tolerance.

  3. 03

    Outdoor fan motor wiring fault

    Wiring / connection

    Loose terminals, corroded connectors, or damaged insulation on the fan motor wiring can cause intermittent or total fan motor failure. Inspect all wiring connections at the motor and control board for signs of damage or looseness.

  4. 04

    Dirty or fouled condenser coil

    Wiring / connection

    A condenser coil coated with dirt, dust, or cottonwood debris acts as an insulating layer that traps heat and causes coil temperatures to rise abnormally. The coil should be cleaned with a suitable coil cleaner and low-pressure rinse.

  5. 05

    Low refrigerant charge

    Part replacement

    An undercharged refrigerant system forces the condenser to work harder to reject heat, which can push condenser temperatures above normal operating limits. This requires a licensed technician to check system pressures and address any refrigerant leak before recharging.

See the test procedure for each cause

Frequently asked questions about P2

What does P2 mean on a Samsung air conditioner?
The P2 error code on a Samsung air conditioner means the system has shut down the compressor because the condenser temperature reached 95°C on six successive detections. This is a protective fault designed to prevent compressor damage from sustained overheating. The outdoor unit is not shedding heat adequately, and the root cause must be identified and corrected before the system will restart normally.
Can I fix the P2 error code myself?
Some causes of the P2 error are DIY-friendly. You can clear obstructions from around the outdoor unit, clean a dirty condenser coil, and visually inspect fan motor wiring. Testing and replacing the fan motor capacitor is also within reach for a knowledgeable DIYer with basic electrical tools. However, if the issue involves the refrigerant charge or internal electrical components, a certified HVAC technician should handle the repair.
Is it safe to keep running my air conditioner with a P2 error?
No, you should not attempt to bypass or ignore the P2 shutdown. The system is detecting a real thermal fault, and continued operation under those conditions could permanently damage the compressor, which is the most expensive component in the system. Allow the unit to cool down, identify and correct the cause, and then allow the system to restart normally.
How much does it cost to repair a P2 error on a Samsung air conditioner?
Repair costs vary depending on the cause. A basic service call to clean the coil and clear obstructions might run between $75 and $200. Replacing a fan motor capacitor typically costs between $100 and $250 including labor. If the outdoor fan motor itself needs replacement, expect costs in the range of $250 to $600. Refrigerant leak detection and recharge can add another $150 to $400 or more depending on the system size and refrigerant type.
Will resetting the unit clear the P2 error code?
A power reset may temporarily clear the P2 fault and allow the unit to restart, but the error will return if the underlying cause has not been fixed. The system requires six consecutive detections of 95°C condenser temperature before triggering the shutdown, so a reset only resets the detection counter. Without correcting the airflow restriction, fan circuit fault, or other root cause, the system will reach the threshold again and shut down.

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