37220R Genie GSTB-BX Overhead Door Safe-T Beam Photo Eyes Safety Sensors 37221R

Overhead Door Part Numbers: OSTB-BX, 37221R, 20374S, 20374T, 20374TS, 34094R, 37221, 761825018556. Is your Genie or Overhead Door opener reversing?. Do you have to hold the the wall button to get the door to close?.

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