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Error code reference

Samsung Air Conditioner Error Code OUTDOOR_YELLOW_RED_FLICKER

Compressor starting error

Samsung codesSamsung air conditioner codes

Compressor starting error

First step from the service manual

Check compressor TAB terminal connections, service valve, EEV motor

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

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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What OUTDOOR_YELLOW_RED_FLICKER means on a Samsung air conditioner

The OUTDOOR_YELLOW_RED_FLICKER error on a Samsung air conditioner indicates a compressor starting error, meaning the outdoor unit's compressor failed to start or complete its startup sequence within the expected parameters. This fault is signaled by the outdoor unit's LED indicator flickering between yellow and red. The compressor starting process depends on several interconnected components functioning correctly: the compressor motor windings must have proper electrical continuity, the refrigerant circuit must be at an appropriate pressure, and the electronic expansion valve (EEV) must be operating correctly to regulate refrigerant flow during startup.

The first diagnostic step focuses on three specific areas: the compressor TAB terminal connections, the service valve, and the EEV motor. Loose, corroded, or damaged TAB terminal connections can prevent the compressor from receiving proper starting current. A closed or partially closed service valve restricts refrigerant flow and can cause abnormally high head pressure on startup, overloading the compressor. A faulty EEV motor that fails to open the valve during the startup sequence will similarly starve the compressor of refrigerant, causing it to trip before reaching operating speed.

Additionally, internal compressor faults such as seized mechanical components or failed start windings can produce this error. High ambient temperatures combined with already elevated refrigerant pressures can also make starting more difficult. Technicians should verify TAB terminal torque and inspect for corrosion, confirm both service valves are fully open, and test EEV motor coil resistance before concluding the compressor itself has failed.

Source: manufacturer service documentation.

Common causes of OUTDOOR_YELLOW_RED_FLICKER

  1. 01

    Closed or partially closed service valve

    Wiring / connection

    If the refrigerant service valve on the outdoor unit was not fully reopened after service work, it restricts refrigerant flow and causes excessive pressure during startup, preventing the compressor from starting. Visually inspect both the liquid and suction service valves to confirm they are fully open.

  2. 02

    Loose or corroded compressor TAB terminal connections

    Wiring / connection

    The TAB terminals supply starting current to the compressor motor. Loose, corroded, or damaged connections can cause voltage drops that prevent a successful compressor start. Inspect the terminals for corrosion, check torque, and look for signs of arcing or heat damage.

  3. 03

    Faulty EEV motor

    Part replacement

    The electronic expansion valve motor controls refrigerant flow into the system. If the EEV motor coil is open or shorted, the valve will not open properly during startup, depriving the compressor of refrigerant. Test the EEV motor coil resistance and verify the valve responds to control signals.

  4. 04

    Failed compressor motor windings

    Part replacement

    Internal compressor winding failures, including open or shorted windings, will prevent the compressor from starting regardless of external conditions. Measure resistance between the compressor motor terminals and check for continuity to ground to identify winding faults.

  5. 05

    Abnormally high refrigerant pressure

    Wiring / connection

    Overcharged refrigerant or non-condensable gases in the system can create excessive head pressure that the compressor cannot overcome during startup. Connect a gauge set to evaluate system pressures and compare against the unit's specified operating range.

See the test procedure for each cause

Frequently asked questions about OUTDOOR_YELLOW_RED_FLICKER

What does OUTDOOR_YELLOW_RED_FLICKER mean on a Samsung air conditioner?
This error code indicates a compressor starting error on the outdoor unit. The outdoor unit's LED flickers between yellow and red to signal that the compressor failed to start or complete its startup sequence. The most common causes include closed service valves, loose TAB terminal connections, or a malfunctioning electronic expansion valve motor.
Can I fix the OUTDOOR_YELLOW_RED_FLICKER error myself?
Some causes of this error, such as a service valve left partially closed after previous service work, can be corrected without specialized tools. However, diagnosing EEV motor faults, compressor winding failures, or refrigerant pressure issues requires gauges, multimeters, and in many cases an EPA Section 608 certification to handle refrigerants. If you are not a trained technician, it is safest to have a qualified HVAC technician inspect the unit.
Is it safe to keep running my air conditioner when this error appears?
No. When this error is active, the compressor is not running, meaning the system is not providing cooling. Repeatedly attempting to force the unit to start with an underlying fault can cause additional damage to the compressor or electrical components. The system should remain off until the root cause is diagnosed and corrected.
Will resetting the unit clear the OUTDOOR_YELLOW_RED_FLICKER error?
A power reset may temporarily clear the error display, but if the underlying fault, such as a closed service valve, faulty EEV motor, or damaged compressor terminal, has not been resolved, the error will return as soon as the unit attempts to start the compressor again. A reset is useful for confirming whether the fault is intermittent, but it is not a repair.
How much does it cost to repair a Samsung air conditioner showing a compressor starting error?
Repair costs depend heavily on the root cause. Fixing a loose terminal connection or opening a service valve may cost only the price of a service call, typically in the range of $75 to $150. Replacing an EEV motor can run $150 to $400 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 refrigerant type.

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