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Samsung Air Conditioner Error Code E347

Motor wire of outdoor unit Fan2 is not connected.

Samsung codesSamsung air conditioner codes

Motor wire of outdoor unit Fan2 is not connected.

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What E347 means on a Samsung air conditioner

Error code E347 on a Samsung air conditioner indicates that the motor wire for the second outdoor unit fan (Fan2) is not connected or has lost continuity in the connection circuit. The outdoor unit typically contains two fan motors working in tandem to draw air across the condenser coil and dissipate heat. Fan2 refers to the secondary fan motor in this array. The control board monitors the wiring harness connections to each fan motor, and when it detects an open circuit or missing signal from the Fan2 motor wire, it triggers E347 to alert technicians that the motor is electrically isolated from the system.

This error is specifically about the wiring connection rather than motor failure itself, though both can produce similar symptoms. The most common causes include a disconnected connector at the motor terminal, a broken wire in the harness between the control board and the Fan2 motor, or a loose pin in the connector housing that has lost proper contact. Vibration from normal operation can work connectors loose over time, particularly in units that have been running for several years or that have experienced physical disturbance during service or installation.

Because the outdoor unit fan motors are critical to heat rejection, the system will typically shut down or restrict operation when this fault is active to prevent compressor damage from inadequate condenser airflow. Resolving E347 requires physically inspecting the Fan2 motor wiring harness, verifying all connectors are fully seated, and checking wire integrity from the motor terminals back to the outdoor unit control board.

Source: manufacturer service documentation.

Common causes of E347

  1. 01

    Disconnected motor wire connector

    Wiring / connection

    The wiring harness connector at the Fan2 motor terminal may have come loose or unplugged, which is the most direct cause of this fault. Inspect the connector at the motor body and at the control board for proper seating.

  2. 02

    Broken or damaged wire in the harness

    Part replacement

    A wire in the Fan2 harness may be broken internally or at a stress point, creating an open circuit even if connectors appear intact. A continuity test along each wire from the motor to the board will identify a break.

  3. 03

    Loose or corroded connector pin

    Wiring / connection

    Individual pins inside the connector housing can back out or corrode, causing intermittent or complete loss of contact without the connector visibly appearing disconnected. Inspect pins closely and test for continuity through the connector.

  4. 04

    Outdoor unit Fan2 motor failure

    Part replacement

    If the motor windings have failed internally, the control board may interpret the resulting open circuit as a wiring disconnection. Testing the motor's resistance across its terminals will help determine if the motor itself needs replacement.

  5. 05

    Outdoor unit control board fault

    Part replacement

    In rare cases, the control board may incorrectly report a disconnected motor wire due to a board-level failure on the Fan2 monitoring circuit. This is typically diagnosed only after wiring and the motor have been confirmed functional.

See the test procedure for each cause

Frequently asked questions about E347

What does E347 mean on a Samsung air_conditioner?
E347 means the outdoor unit's second fan motor (Fan2) wire is detected as not connected. The system monitors the wiring to each outdoor fan motor, and this code appears when it cannot confirm a proper electrical connection to Fan2. The unit will typically restrict or stop operation to protect the compressor from overheating due to inadequate condenser airflow.
Can I fix E347 myself, or do I need a technician?
If you are comfortable working around electrical components, you can visually inspect the outdoor unit for an obviously loose or unplugged connector on the Fan2 motor wiring harness. However, diagnosing a broken wire or failed motor requires continuity testing with a multimeter, and accessing internal components of the outdoor unit involves exposure to capacitors that can retain dangerous charge. A qualified technician is recommended for anything beyond a visual connector check.
Is it safe to run my air conditioner with the E347 error active?
Running the unit with E347 active is not advisable. If Fan2 is non-functional, the condenser coil will not receive adequate airflow, causing the compressor to operate under high head pressure and thermal stress. This can lead to compressor damage, which is significantly more expensive to repair than fixing a wiring issue. The system may shut itself down automatically, but you should not attempt to bypass this protection.
Will resetting my Samsung air conditioner clear the E347 error?
A reset may temporarily clear the displayed error code, but E347 will return if the underlying wiring issue has not been corrected. The control board will re-detect the open circuit on the Fan2 motor wire each time the system attempts to operate the fan. A permanent resolution requires physically inspecting and repairing the wiring or replacing the affected component.
How much does it cost to repair the E347 error on a Samsung air conditioner?
Repair costs depend on the root cause. If the fix is simply reseating a disconnected connector, labor costs alone may range from around 75 to 150 dollars for a service call. If wiring needs to be repaired or replaced, costs may rise to 150 to 300 dollars. If the Fan2 motor has failed and requires replacement, the total cost including parts and labor can range from 250 to 600 dollars or more depending on the specific model and part availability.

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