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Error code reference

Samsung Air Conditioner Error Code YEL_FLICKER_RED_FLICKER_GRN_FLICKER

PFC overcurrent error

Samsung codesSamsung air conditioner codes

PFC overcurrent error

First step from the service manual

Replace outdoor control board

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

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What YEL_FLICKER_RED_FLICKER_GRN_FLICKER means on a Samsung air conditioner

The YEL_FLICKER_RED_FLICKER_GRN_FLICKER error code on a Samsung air conditioner indicates a PFC (Power Factor Correction) overcurrent fault. The PFC circuit is located on the outdoor control board and is responsible for regulating the incoming AC power, correcting the power factor to improve efficiency, and converting AC to a stable DC bus voltage that feeds the inverter compressor drive circuitry. When the PFC circuit detects current levels exceeding its design threshold, it triggers this fault to protect downstream components from damage.

An overcurrent condition in the PFC stage can result from a failed PFC boost inductor, a shorted or degraded PFC IGBT or diode module, capacitor failure on the DC bus, or a fault within the control circuitry that governs PFC switching. In some cases, an external power supply issue such as voltage spikes or sustained overvoltage can push PFC current beyond safe limits, triggering the error even when the board itself has not yet failed. However, because the PFC components are integrated into the outdoor control board assembly on these units, the recommended first diagnostic step is replacement of the outdoor control board rather than attempting component-level repair of the PFC stage.

Source: manufacturer service documentation.

Common causes of YEL_FLICKER_RED_FLICKER_GRN_FLICKER

  1. 01

    Failed outdoor control board (PFC stage)

    Part replacement

    The PFC switching components or control circuitry on the outdoor board have failed internally, causing overcurrent detection. This is the primary suspected cause, and board replacement is the first recommended diagnostic action.

  2. 02

    Shorted or degraded PFC power module

    Part replacement

    The IGBT or diode module within the PFC boost circuit may be shorted, causing excessive current draw. This fault is contained within the outdoor control board assembly.

  3. 03

    DC bus capacitor failure

    Part replacement

    A failed or heavily degraded capacitor on the DC bus can cause voltage instability that results in PFC overcurrent conditions. Inspect the capacitors on the outdoor board for bulging, leaking, or discoloration.

  4. 04

    Incoming power supply anomaly

    Wiring / connection

    Voltage spikes, sustained overvoltage, or severely unbalanced supply voltage can drive PFC current beyond the fault threshold. Check supply voltage at the outdoor unit disconnect for proper levels and stability.

  5. 05

    Wiring fault in outdoor unit power circuit

    Wiring / connection

    Loose, corroded, or damaged wiring connections in the outdoor unit power input circuit can create resistance or intermittent shorts that contribute to overcurrent faults. Inspect all high-voltage terminal connections.

See the test procedure for each cause

Frequently asked questions about YEL_FLICKER_RED_FLICKER_GRN_FLICKER

What does YEL_FLICKER_RED_FLICKER_GRN_FLICKER mean on a Samsung air conditioner?
This code indicates a PFC (Power Factor Correction) overcurrent error in the outdoor unit. The PFC circuit, which regulates incoming power and feeds the inverter drive, has detected current beyond its safe operating limit and shut the system down. The outdoor control board is the primary component associated with this fault.
Can I fix the YEL_FLICKER_RED_FLICKER_GRN_FLICKER error myself?
This error involves high-voltage circuitry inside the outdoor unit, including components that can retain dangerous charge even after power is disconnected. The recommended first step is replacement of the outdoor control board, which is a task best handled by a qualified HVAC technician. DIY attempts on inverter drive and PFC circuits carry serious electrical safety risks.
Will resetting the air conditioner clear the YEL_FLICKER_RED_FLICKER_GRN_FLICKER error?
A power reset may temporarily clear the fault and allow the unit to restart, but if the underlying PFC circuit fault is present, the error will return, often quickly. Resetting without addressing the root cause can risk further damage to the outdoor unit components. Persistent recurrence after reset confirms a hardware fault requiring board replacement.
Is it safe to run my Samsung air conditioner when it shows this error?
No. The unit has shut itself down specifically to prevent electrical damage, and attempting to force continued operation is not safe. The PFC overcurrent condition could damage additional components in the outdoor unit if the fault is not resolved before returning the system to service.
How much does it cost to repair the YEL_FLICKER_RED_FLICKER_GRN_FLICKER error on a Samsung air conditioner?
Repair costs vary depending on the specific outdoor unit model and labor rates in your area. Outdoor control board replacement typically falls in the range of $200 to $600 or more for parts and labor combined. Obtaining a quote from a certified Samsung service technician before proceeding is advisable, as board pricing varies significantly by model.

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