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Error code reference

Samsung Air Conditioner Error Code 461

Low-voltage (low-amperage) error detected in compressor current sensor

Samsung codesSamsung air conditioner codes

Low-voltage (low-amperage) error detected in compressor current sensor - CT sensor value below 4A for five hours or more.

First step from the service manual

Check compressor connection wire; check defective compressor magnetic switch.

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

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What 461 means on a Samsung air conditioner

Samsung air conditioner error code 461 indicates a low-voltage (low-amperage) fault in the compressor current sensor, specifically the CT (current transformer) sensor. The system continuously monitors the amperage drawn by the compressor. When the CT sensor reads a value below 4 amps for a sustained period of five hours or more, the control board logs error 461 and triggers a fault condition. This threshold exists because a properly running compressor will always draw current above this level during normal operation.

The most likely causes fall into two categories: wiring and connection faults, or mechanical and electrical compressor issues. A loose, corroded, or broken connection on the compressor's power wiring can prevent adequate current from reaching the compressor, causing artificially low CT readings. Similarly, a faulty compressor magnetic contactor (the magnetic switch that engages the compressor circuit) may be failing to make a solid electrical connection, resulting in intermittent or insufficient current flow that registers below the 4-amp threshold.

It is also possible that the CT sensor itself has failed or shifted out of calibration, causing it to report falsely low amperage even when the compressor is drawing normal current. In less common cases, the compressor motor windings may be degraded, drawing insufficient current due to internal damage. Diagnosing this code starts with physically inspecting the compressor wiring harness and verifying the magnetic contactor is closing fully and making proper contact under load.

Source: manufacturer service documentation.

Common causes of 461

  1. 01

    Loose or damaged compressor connection wire

    Wiring / connection

    A loose, corroded, or broken wire at the compressor terminal prevents normal current flow, causing the CT sensor to read below the 4-amp threshold. Inspect all wiring connections at the compressor for signs of corrosion, burning, or physical disconnection.

  2. 02

    Defective compressor magnetic contactor (magnetic switch)

    Part replacement

    The magnetic switch that engages the compressor circuit may be failing to close fully or may have worn contacts, resulting in insufficient current reaching the compressor. Check for pitting, arcing, or incomplete contact closure on the contactor under load.

  3. 03

    Faulty CT sensor

    Part replacement

    The current transformer sensor itself may have failed or drifted out of calibration, reporting amperage below 4A even when the compressor is drawing normal current. If wiring and the contactor check out correctly, the CT sensor should be tested and replaced if defective.

  4. 04

    Compressor not running

    Part replacement

    If the compressor has failed internally or is not starting due to a seized motor or open winding, it will draw little to no current, triggering this error. Use a clamp meter to verify actual amperage at the compressor during a run cycle.

See the test procedure for each cause

Frequently asked questions about 461

What does 461 mean on a Samsung air conditioner?
Error code 461 on a Samsung air conditioner indicates that the CT (current transformer) sensor monitoring the compressor has detected a current reading below 4 amps for five or more consecutive hours. This signals that the compressor is drawing abnormally low or no current, which can result from wiring faults, a failed magnetic contactor, a bad CT sensor, or a non-functioning compressor. The system flags this condition to prevent extended operation in an abnormal state.
Can I fix error code 461 myself?
Some basic checks, such as visually inspecting compressor wiring connections for obvious looseness or corrosion, can be done by a knowledgeable DIYer. However, testing and replacing the magnetic contactor, CT sensor, or compressor involves working with high-voltage components and refrigerant systems, which require proper certifications and tools. It is strongly recommended to have a qualified HVAC technician perform the diagnosis and repair beyond basic visual inspection.
Is it safe to run my air conditioner when error 461 is displayed?
Running the unit while error 461 is active is not advisable. The error indicates the compressor may not be operating correctly, and continued operation without resolving the root cause could lead to further damage to the compressor or associated electrical components. Turn the unit off and contact a technician for diagnosis.
Will resetting the unit clear error code 461?
A power reset may temporarily clear the error display, but the fault will return if the underlying issue is not resolved. Because this error requires the low-current condition to persist for five hours before triggering, a reset simply restarts that monitoring window without fixing the root cause. The compressor wiring, contactor, and CT sensor must be properly inspected and repaired to permanently clear the code.
How much does it cost to repair error code 461 on a Samsung air conditioner?
Repair costs depend on the root cause identified during diagnosis. Replacing a magnetic contactor typically costs in the range of $150 to $350 including labor, while CT sensor replacement may run $100 to $250. If the compressor itself has failed, replacement costs can range from $800 to $2,500 or more depending on the unit size and labor rates in your area. A diagnostic service call fee, typically $75 to $150, is usually charged before any repair work begins.

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