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Error code reference

Samsung Air Conditioner Error Code E112

Perfect fan sensor error.

Samsung codesSamsung air conditioner codes

Perfect fan sensor error.

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What E112 means on a Samsung air conditioner

The E112 error code on a Samsung air conditioner indicates a fault with the Perfect fan sensor. This sensor monitors the operation of the fan motor, typically tracking parameters such as rotational speed, position, or operational feedback signals. When the control board detects that the sensor output falls outside expected parameters, or receives no signal at all, it triggers the E112 code and may halt fan operation to prevent equipment damage.

The Perfect fan sensor is integral to the indoor fan motor assembly. Failures commonly stem from a damaged or disconnected sensor harness, corrosion at the connector terminals, or a sensor that has failed internally. In some cases, the fan motor itself may be the root cause, as a mechanically seized or electrically compromised motor can produce abnormal sensor readings that trigger this fault.

Because the fan is responsible for circulating conditioned air across the evaporator coil and into the room, a sensor fault in this circuit can cause the unit to run inefficiently or shut down entirely. Technicians should inspect the sensor wiring harness, connector integrity, and the sensor component itself before considering replacement of the fan motor or control board.

Source: manufacturer service documentation.

Common causes of E112

  1. 01

    Faulty or failed fan sensor

    Part replacement

    The Perfect fan sensor itself may have failed internally, producing no signal or an out-of-range signal. This is a common cause and typically requires sensor replacement.

  2. 02

    Loose or disconnected wiring harness

    Wiring / connection

    The connector between the fan sensor and the control board may have come loose or partially disconnected, interrupting the signal. Inspect all connectors along the sensor circuit for secure seating.

  3. 03

    Corroded or damaged connector terminals

    Wiring / connection

    Moisture exposure can cause corrosion at the sensor connector pins, leading to high resistance or an open circuit. Check terminals for discoloration, oxidation, or physical damage.

  4. 04

    Failed indoor fan motor

    Part replacement

    If the fan motor is mechanically seized or has an internal electrical fault, the sensor may be unable to detect proper rotation, triggering E112. Test motor resistance and check for free rotation.

  5. 05

    Defective control board

    Part replacement

    If the sensor and wiring check out correctly, the indoor unit control board may have a fault preventing it from reading the sensor signal properly. This is the least common cause and should be diagnosed after ruling out other components.

See the test procedure for each cause

Frequently asked questions about E112

What does E112 mean on a Samsung air conditioner?
E112 indicates a Perfect fan sensor error on a Samsung air conditioner. The control board is not receiving a valid signal from the sensor that monitors the indoor fan motor. This fault can prevent the unit from operating normally until the sensor circuit is inspected and repaired.
Can I fix the E112 error myself?
Some basic checks, such as inspecting the wiring harness and reconnecting any loose connectors, can be done by a knowledgeable DIYer. However, testing sensor output, evaluating motor condition, and replacing internal components typically require specialized tools and experience. If you are not comfortable working inside the unit, a qualified technician is recommended.
Is it safe to keep running my Samsung air conditioner with an E112 error?
It is not advisable to continue running the unit while E112 is active. The fan sensor fault may mean the indoor fan is not operating correctly, which can lead to reduced airflow, coil freezing, or further component damage. Shut the unit off and have it inspected before resuming use.
How much does it cost to repair an E112 error on a Samsung air conditioner?
Repair costs vary depending on the root cause. A simple wiring fix or connector repair may cost relatively little in labor only. Replacing the fan sensor or fan motor typically costs more, with parts and labor combined ranging from roughly $100 to $400 or more depending on the unit model and your location.
Will resetting my Samsung air conditioner clear the E112 error?
A power reset may temporarily clear the error display, but the code will return if the underlying sensor fault has not been resolved. Resetting without addressing the root cause is not a reliable fix. The sensor, wiring, and fan motor should be properly diagnosed and repaired to permanently clear the E112 code.

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