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Error code reference

Samsung Air Conditioner Error Code E471

Digital compressor loading failure or OLP trip detected based on temperature/pressure conditions during operation.

Samsung codesSamsung air conditioner codes
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What the E471 error code actually means

Your Samsung air conditioner has detected that the compressor, the part that circulates refrigerant to cool or heat your home, has either failed to start under load or has shut itself off due to overheating or excessive pressure. This is a protective shutdown designed to prevent permanent damage to the compressor. A technician will need to inspect the unit, as this error typically points to a refrigerant, airflow, or compressor issue that requires professional diagnosis.

Diagnostic procedure

The full E471 procedure

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1
First diagnostic step
Check resistance between compressor terminals L1(R)-L2(S), L2(S)-L3(T), L3(T)-L1(R).
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Most common causes of E471

Ranked by how often they cause this code
  1. 1Compressor winding failure
  2. 2OLP (overload protector) trip from overheating
  3. 3Refrigerant undercharge or overcharge
  4. 4Dirty or blocked condenser coils
  5. 5Faulty inverter drive board

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Questions people ask about E471

What does E471 mean on a Samsung air conditioner?
E471 indicates a digital compressor loading failure or an OLP (overload protector) trip caused by abnormal temperature or pressure conditions during operation. The system shuts down to prevent compressor damage. Diagnosis begins with resistance checks across the three compressor terminal pairs to determine whether the fault is electrical or operational in nature.
Is it safe to continue running my air conditioner with the E471 error?
No. The E471 error is a protective shutdown, and continuing to operate the unit while this fault is active risks permanent compressor damage. The system should remain off until the root cause is diagnosed and corrected. Repeated compressor trips without resolution can lead to total compressor failure, which is a significantly more expensive repair.
How much does it cost to repair a Samsung air conditioner showing E471?
Repair costs vary widely depending on the root cause. Cleaning condenser coils or correcting refrigerant charge typically costs between $100 and $300 for a service call and labor. Replacing an inverter drive board generally runs between $250 and $600 including parts and labor. Compressor replacement is the most expensive outcome, typically ranging from $800 to $2,000 or more depending on the unit size and installation complexity.
Can I fix E471 on my Samsung air conditioner myself?
Some causes, such as dirty condenser coils restricting airflow, can be addressed by a knowledgeable homeowner. However, compressor winding testing, refrigerant charge verification, and inverter board diagnosis require specialized tools and technical knowledge. Refrigerant handling also requires EPA certification in the United States, so most repairs for this code are best left to a licensed HVAC technician.
Will resetting the unit clear the E471 error?
A power reset may temporarily clear the error display, and if the overload protector has tripped thermally, the compressor may restart once it has cooled down. However, if the underlying cause such as a refrigerant issue, blocked airflow, or winding fault is not resolved, the error will return. A reset alone is not a fix and should not substitute for proper diagnosis.

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