Code 2
Overhead Door Safety Sensor Circuit Fault

Overhead Door opener LED flashes 2 times and door will not close from remote, but will close if wall button is held down

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Open or shorted safety sensor wiring, Defective safety sensor, Incorrect sensor wiring polarity, Loose terminal connections at opener head

How to Fix / Troubleshooting

Safety first: Disconnect power to the opener before working on wiring. Do not bypass safety sensors for normal operation.

  • 1. Verify sensor LEDs: Check each photo eye. One or both LEDs may be off or dim. This often indicates a wiring or sensor failure rather than simple misalignment.
  • 2. Inspect wiring at the opener: Remove the opener light cover if needed. Locate the sensor wires at the low-voltage terminal strip. Tighten any loose screws and ensure the wires are under the correct terminals (usually white/black or marked for sensors).
  • 3. Trace the wire run: Follow the sensor wires along the wall and track. Look for staples driven too tightly, cuts, crushed insulation, or splices that have come apart.
  • 4. Test continuity (if you have a meter): With power off, disconnect the sensor wires at the opener and at the sensors. Use a multimeter to check continuity of each conductor. Replace damaged wire runs.
  • 5. Swap sensors (if possible): If you have a known-good compatible Overhead Door sensor, temporarily connect it at the opener with a short test wire. If the code clears, the original sensor is defective.
  • 6. Replace faulty components: Install a new Overhead Door safety sensor kit or new low-voltage wire as needed. Reconnect, restore power, and test door operation.
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Repair Difficulty

Medium 3/5

Required Part

Safety Sensor Kit (Photo Eyes) and Low-Voltage Sensor Wire
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