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Error code reference

Samsung Air Conditioner Error Code E364

Error due to over-current of inverter compressor 2.

Samsung codesSamsung air conditioner codes

Error due to over-current of inverter compressor 2.

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What E364 means on a Samsung air conditioner

Error code E364 on a Samsung air conditioner indicates an over-current condition detected on inverter compressor 2. This fault occurs when the current draw of the second inverter-driven compressor exceeds the acceptable operating threshold as measured by the inverter module or control board. The inverter compressor relies on variable-frequency drive circuitry to modulate speed and capacity, and when the current spikes beyond design limits, the system triggers this fault to protect the compressor and associated power electronics from thermal or electrical damage.

Over-current conditions on inverter compressors typically stem from mechanical or electrical failures within the compressor itself, problems in the inverter module driving that compressor, or issues in the wiring and connections between the two components. A compressor with degraded windings, failed bearings causing increased mechanical load, or partial internal shorts can all force abnormally high current draw. Similarly, a failing inverter module that is not properly regulating output voltage and frequency can push excessive current through the compressor windings.

Additional contributing factors include low refrigerant charge, which causes the compressor to work harder and draw higher current, as well as poor power supply conditions such as voltage imbalance or low incoming voltage. Blocked airflow across the condenser can also lead to elevated head pressure, increasing compressor load and current draw. Technicians should measure compressor winding resistance and check inverter output waveforms before condemning individual components.

Source: manufacturer service documentation.

Common causes of E364

  1. 01

    Failing or seized inverter compressor 2

    Part replacement

    A compressor with worn bearings, degraded motor windings, or an internal mechanical failure will draw significantly higher current during operation. Technicians can check winding resistance for shorts or opens and listen for unusual mechanical noise during attempted startup.

  2. 02

    Defective inverter module for compressor 2

    Part replacement

    The inverter module controls compressor speed by regulating output frequency and voltage. A failing inverter board can send improper signals that cause excessive current draw, even when the compressor itself is serviceable.

  3. 03

    Low refrigerant charge

    Wiring / connection

    Insufficient refrigerant causes the compressor to operate under increased load in an attempt to maintain system pressures, which can push current draw above safe limits. Manifold gauge readings below expected operating pressures indicate a leak or undercharge condition.

  4. 04

    Wiring fault or poor connection between inverter and compressor

    Wiring / connection

    Loose terminals, corroded connectors, or damaged wiring between the inverter module and compressor 2 can cause resistance heating and abnormal current readings. Visual inspection and continuity testing of all power leads should be performed.

  5. 05

    High head pressure due to restricted airflow or dirty condenser coil

    Wiring / connection

    A blocked or dirty condenser coil restricts heat rejection, causing abnormally high discharge pressure and increased compressor load. Inspecting the condenser coil for debris and verifying adequate airflow around the outdoor unit is a straightforward early check.

See the test procedure for each cause

Frequently asked questions about E364

What does E364 mean on a Samsung air conditioner?
E364 indicates an over-current fault on inverter compressor 2. The system detected that the current drawn by the second compressor exceeded safe operating limits and shut down to prevent damage. The fault involves the compressor itself, its inverter drive module, or supporting systems such as refrigerant charge and airflow. A technician will need to diagnose which component is responsible before the unit can be returned to service.
Can I fix E364 on my Samsung air conditioner myself?
Most causes of E364 require professional diagnosis and repair. Checking for obvious issues like a blocked condenser coil or debris restricting airflow is something a homeowner can do safely, but testing compressor windings, measuring inverter output, and handling refrigerant all require specialized tools and certifications. Attempting repairs on high-voltage inverter components without proper training is dangerous.
Is it safe to keep running my Samsung air conditioner when E364 appears?
No, the unit should not be operated while this fault is active. The over-current condition indicates the compressor or its drive electronics are under abnormal stress, and continued operation could result in permanent compressor failure or damage to the inverter module. The system has shut down as a protective measure, and that protection should be respected until the root cause is resolved.
How much does it cost to repair a Samsung air conditioner showing E364?
Repair costs vary widely depending on the root cause. If the fault is caused by a dirty condenser coil or low refrigerant requiring a recharge, costs may range from a modest service call fee to a few hundred dollars. If the inverter module or compressor 2 requires replacement, costs can range from several hundred to over a thousand dollars depending on the unit size and part pricing. A technician diagnosis is the first step to getting an accurate estimate.
Will resetting the unit clear the E364 error code?
A power cycle may temporarily clear the fault and allow the unit to attempt operation again, but if the underlying cause is still present, the error will return quickly. Resetting without addressing the root cause risks additional damage to the compressor or inverter components. A reset can be useful as part of a diagnostic process to observe fault behavior, but it is not a repair solution.

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