Samsung RF29DB9600Refrigerator

Error Code 31C

The Cool Select room fan isn't working properly

Moderate

Address soon - your appliance may not work properly

Also displayed as: 31C

What This Means

Fan motor feedback signal disconnected; Motor wire separation or loose connection; Defective BLDC fan motor; Main PBA relay failure; Blocked fan rotor

What actually causes this:

The Cool Select fan is stuck or the wire is disconnected

First Thing to Check

Check if air is flowing out of the Cool Select room vents

Parts Involved

Cool Select Fan MotorMotor ConnectorMain PBA

How to Fix

  1. 1

    1. Check feedback signal between Main PBA CN40 pins 13 and 15 while fan operates

  2. 2

    2. Signal should have specific frequency when fan spins

  3. 3

    3. Turn off power and wait 5 minutes

  4. 4

    4. Check for rotor obstruction or foreign objects

  5. 5

    5. Verify motor connector at CN40 is fully seated

  6. 6

    6. Check DC 7-12V power supply at CN40 pins 13 and 15

  7. 7

    7. Replace fan motor if voltage is normal but signal absent

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