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Error code reference

Samsung Air Conditioner Error Code E105

Indoor unit EVAP OUT sensor breakaway (sensor detached from pipe).

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Indoor unit EVAP OUT sensor breakaway (sensor detached from pipe).

First step from the service manual

Check if indoor unit EVAP OUT sensor is separated from the pipe and reassemble.

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

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What E105 means on a Samsung air conditioner

The Samsung E105 error code indicates that the evaporator outlet (EVAP OUT) temperature sensor on the indoor unit has physically separated from the refrigerant pipe it is designed to monitor. This sensor is a thermistor clipped or clamped directly to the evaporator outlet pipe, and its job is to report the refrigerant temperature leaving the evaporator coil. The control board uses this data to regulate cooling cycles, prevent coil icing, and protect the system from operating outside safe temperature parameters. When the sensor loses contact with the pipe, the readings it sends become inaccurate or erratic, triggering the E105 fault.

Because the sensor is a contact-type device held against the pipe by a bracket, clip, or foam insulation wrap, it can work loose due to vibration over time, improper installation, or physical disturbance during filter cleaning or maintenance. Once detached, the sensor reads ambient air temperature rather than pipe temperature, which causes the control board to detect an abnormal or out-of-range reading and shut the unit down to prevent damage.

The primary diagnostic step is to open the indoor unit and visually inspect the EVAP OUT sensor position. If the sensor has pulled away from the pipe, it should be repositioned against the pipe surface and secured with its original clip or bracket. If the mounting hardware is damaged or missing, it must be replaced to ensure proper thermal contact. After reassembly, the error will typically clear once the unit is powered back on and the sensor reads a plausible pipe temperature.

Source: manufacturer service documentation.

Common causes of E105

  1. 01

    Sensor physically detached from pipe

    Wiring / connection

    The most common cause is the sensor clip or bracket losing its grip, allowing the thermistor to fall away from the evaporator outlet pipe. Inspect the sensor location inside the indoor unit to confirm separation.

  2. 02

    Damaged or missing mounting clip

    Part replacement

    The retaining clip or bracket that holds the sensor against the pipe may be cracked or lost, making it impossible to secure the sensor without replacement hardware. Check the clip condition when inspecting the sensor.

  3. 03

    Vibration from normal operation

    Wiring / connection

    Prolonged unit vibration can gradually loosen a sensor that was only lightly seated. This is more common on older units or installations where the sensor was not fully clipped into its mount.

  4. 04

    Disturbed during maintenance

    Wiring / connection

    The sensor may have been knocked loose during filter cleaning, coil cleaning, or a previous service visit. If the error appeared shortly after maintenance, this is the likely cause.

  5. 05

    Faulty or damaged sensor lead wire

    Part replacement

    If the sensor wiring harness is strained or the lead wire is too short to reach the pipe correctly, the sensor may not seat properly even after repositioning. Inspect the wire length and condition for any damage.

See the test procedure for each cause

Frequently asked questions about E105

What does E105 mean on a Samsung air conditioner?
E105 means the evaporator outlet temperature sensor on the indoor unit has separated from the refrigerant pipe it is supposed to monitor. Without proper contact with the pipe, the sensor cannot provide accurate temperature readings, so the unit shuts down to protect itself. The fix typically involves opening the indoor unit and reattaching the sensor to the pipe.
Can I fix the E105 error myself?
In many cases, yes. The repair involves opening the indoor unit panel, locating the EVAP OUT sensor, and pressing it back into contact with the evaporator outlet pipe, then securing it with its clip or bracket. No refrigerant handling or electrical work beyond basic reassembly is required, making it accessible for a careful DIYer. However, if the mounting hardware is broken or the sensor itself is damaged, replacement parts will be needed.
Is it safe to keep running the air conditioner with an E105 error?
The unit will typically shut itself down when E105 is active, so continued operation is generally not possible until the fault is resolved. Attempting to repeatedly reset and run the unit without fixing the sensor position risks inaccurate temperature control, which could lead to coil icing or compressor stress over time. It is best to address the sensor position before resuming normal use.
Will resetting the unit clear the E105 error?
A power reset alone will not permanently clear E105 if the sensor is still detached from the pipe. The error will return once the unit restarts and detects the out-of-range temperature reading again. The sensor must be physically repositioned and secured against the pipe before the fault will stay resolved after a reset.
How much does it cost to repair an E105 error on a Samsung air conditioner?
If the sensor only needs to be repositioned with no parts required, a service call to have a technician perform the repair typically costs between $75 and $150 depending on your location and the service provider. If the mounting clip or the sensor itself needs replacement, parts and labor combined generally range from $100 to $250. DIY repair costs are minimal if no replacement parts are needed.

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