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Optical Encoder (RPM Sensor) 39735R.S- Belt/Chain Drive Models

Product Description
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Optical Encoder also called the RPM sensor, is used in certain Genie model chain and belt drive smart connected garage door openers. (See below for compatibility) Replacing the Optical Encoder may resolve the issue of short travel problems or drifting limits on the garage door opener. 

  • Compatible with models; 3120H, 3120HB (Pro Connected Series)
  • If you do not see your model on this list or have any questions please contact Genie for compatibility questions
  • Genuine Genie Replacement Part 
Sku: 39735R.S


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