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F4: Outdoor coil temperature sensor malfunction (20k)


  1. Verify the Temperature Sensor:

    • Inspect the outdoor coil temperature sensor (20k) for any visible damage.

    • Ensure the sensor is securely connected and properly positioned on the outdoor coil.

  2. Examine the Outdoor Board:

    • Check the outdoor board for any indications of malfunction related to the coil temperature sensor.

    • Confirm proper wiring and connections on the outdoor board.

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