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Error code reference

Samsung Air Conditioner Error Code OUTDOOR_NO_GAS

No gas error

Samsung codesSamsung air conditioner codes

No gas error - insufficient refrigerant

First step from the service manual

Charge standard amount of refrigerant

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

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  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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What OUTDOOR_NO_GAS means on a Samsung air conditioner

The OUTDOOR_NO_GAS error code indicates that the Samsung air conditioner's control system has detected insufficient refrigerant pressure in the refrigerant circuit. The outdoor unit continuously monitors system pressures and compressor operating conditions to verify that adequate refrigerant charge is present. When refrigerant levels fall below the threshold required for proper operation, the system triggers this fault to prevent compressor damage that can result from running in a low-charge condition.

The most common root cause of this error is a refrigerant leak somewhere in the sealed system. Leaks can develop at flare fittings, Schrader valve cores, brazed joints, or within the evaporator or condenser coil itself. Over time, vibration and thermal cycling can loosen connections or cause microcracks in coil tubing. In some cases, especially on newer installations, the error can appear if the system was never properly charged to the correct specification during initial commissioning.

Diagnosing this error requires a licensed HVAC technician, as working with refrigerants is regulated. The first diagnostic step is to connect manifold gauges to verify system pressures and confirm an actual low-charge condition. If low charge is confirmed, the technician must locate and repair any active leak before recharging the system to the manufacturer-specified refrigerant quantity. Simply adding refrigerant without finding the leak source will result in the error returning within a short period.

Source: manufacturer service documentation.

Common causes of OUTDOOR_NO_GAS

  1. 01

    Refrigerant leak at flare fittings or joints

    Wiring / connection

    Flare connections at the indoor and outdoor unit service ports are common leak points, especially if fittings were not properly torqued during installation or have loosened over time due to vibration. A technician can identify this with leak detection dye or an electronic leak detector.

  2. 02

    Gradual refrigerant loss over time

    Part replacement

    Small leaks in the evaporator coil, condenser coil, or brazed joints can cause refrigerant to dissipate slowly over months or years. The system may have operated normally for an extended period before levels dropped low enough to trigger the error.

  3. 03

    Improper initial charge during installation

    Wiring / connection

    If the system was not charged to the correct refrigerant specification at the time of installation, the OUTDOOR_NO_GAS error can appear shortly after commissioning. This is more common in new installations or after a major component replacement.

  4. 04

    Schrader valve core leak

    Part replacement

    The Schrader valve cores on the service ports can develop leaks if the valve caps are missing or if the cores were disturbed during a previous service visit. These leaks are typically small but steady and can be confirmed with a leak detector or soapy water.

  5. 05

    Damaged or punctured refrigerant line set

    Part replacement

    Physical damage to the copper line set running between the indoor and outdoor units, such as from construction activity or rodent damage, can cause a rapid or complete loss of refrigerant charge. The damaged section of tubing will need to be repaired or replaced before recharging.

See the test procedure for each cause

Frequently asked questions about OUTDOOR_NO_GAS

What does OUTDOOR_NO_GAS mean on a Samsung air_conditioner?
The OUTDOOR_NO_GAS error means the outdoor unit has detected that the refrigerant level in the system is too low for safe and effective operation. The system shuts down to protect the compressor from damage that can occur when running with insufficient refrigerant. A technician needs to inspect the system for leaks and recharge it to the correct specification before the unit will operate again.
Can I fix the OUTDOOR_NO_GAS error myself?
This error cannot be resolved without professional help. Handling refrigerants requires EPA Section 608 certification in the United States, and working with refrigerants without a license is illegal. A certified HVAC technician must locate any leak, perform the necessary repairs, and recharge the system to the correct refrigerant amount.
Is it safe to keep running my Samsung air conditioner when this error appears?
No, you should not attempt to bypass or ignore the OUTDOOR_NO_GAS error. The system is designed to shut down when this condition is detected specifically to prevent compressor damage. Running the unit in a low-charge state can overheat and permanently damage the compressor, turning a relatively straightforward refrigerant repair into a much more costly compressor replacement.
How much does it cost to repair the OUTDOOR_NO_GAS error on a Samsung air conditioner?
Repair costs vary depending on the source and severity of the problem. A simple refrigerant recharge with no leak present may cost in the range of $150 to $400. If a leak repair is also required, costs can range from $200 to $600 or more depending on the location of the leak. Coil replacement or line set repair will add significantly to the total cost and could range from $600 to over $1,500.
Will resetting the Samsung air conditioner clear the OUTDOOR_NO_GAS error?
A power reset may temporarily clear the error code, but the error will return quickly if the underlying low-refrigerant condition has not been corrected. Because the system actively monitors refrigerant charge during operation, the fault will be re-triggered as soon as the unit attempts to run with insufficient refrigerant. The only way to permanently clear this error is to have a technician restore the system to the correct refrigerant charge.

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