Ceiling-mounted garage door opener with its rail and power cord
Generic photo: Tony Webster · CC BY 4.0

Field pattern: garage door reverses or won't close (sensors, limits and door balance before the logic board)

Almost all reversing complaints trace to the safety sensors (alignment, dirty lenses, sun, damaged wire), the travel limits, or a door that binds or is out of balance. The wrong turn is replacing the logic board or the opener; the board is doing its job by reversing.

Cross-checked ~40 min easyBrands: LiftMaster, Chamberlain, Craftsman, Genie, All

Before you start

  • Springs, cables, drums and bottom brackets are under high tension: BLOCKED, refer to a garage door technician
  • Unplug the opener before working on wiring or the logic board
  • Keep people and vehicles clear of the door while testing; always retest the safety reversal before leaving

Diagnostic steps

Unlock all 8 steps with expected values

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OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work.

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