Genie 36521R.S 390 MHz Intellicode Internal Receiver Board – Replaces 20437R

Genie

• Fast shipping — same-day on orders before 4:30 PM EST

• Product Description

  The Genie 36521R.S Intellicode Internal Receiver Board is a replacement radio receiver designed for compatible Genie 390 MHz AC screw-drive garage door openers. It installs inside the garage door opener powerhead and receives wireless signals from compatible Genie Intellicode remote controls and keypads.

  This receiver uses Genie Intellicode rolling-code technology, which changes the access code each time a compatible transmitter is activated. It is commonly used to restore remote-control operation when the original internal receiver board has failed, become damaged, or no longer responds reliably.

  The 36521R.S is the current replacement for the older Genie 20437R receiver. The replacement board may be physically smaller than the original board, but it is designed to install and operate as the correct updated replacement.

  Key Features

  • Genuine Genie internal receiver board
  • Genie part number: 36521R.S
  • Also identified as 36521R
  • Operates on the 390 MHz frequency
  • Uses Genie Intellicode rolling-code technology
  • Installs inside the garage door opener powerhead
  • Restores communication with compatible remotes and wireless keypads
  • Direct updated replacement for the discontinued 20437R receiver
  • Includes an attached antenna wire
  • Remotes and keypads must be programmed after installation

  Specifications

  Product type: Internal garage door opener receiver board
  Manufacturer: Genie
  Current part number: 36521R.S / 36521R
  Frequency: 390 MHz
  Radio technology: Genie Intellicode
  Installation location: Inside the opener powerhead
  Primary application: Compatible Genie AC screw-drive garage door openers
  Antenna: Attached antenna lead
  Remotes included: No
  Keypad included: No

  Compatible Garage Door Opener Models

  This receiver board is commonly used with compatible Genie 390 MHz AC screw-drive opener models, including:

  • Genie 1060
  • Genie 1560
  • Genie 2560
  • Genie 3560
  • Genie 3860
  • Genie IC250
  • Genie IS525
  • Genie IS525/B
  • Genie IS550
  • Genie IS550/B
  • Genie IS850
  • Genie IS900
  • Genie IS900/B
  • Genie IS920/A
  • Genie CM7600
  • Genie CM8600
  • Genie CM8600-FN
  • Genie PRO95
  • Genie 2060L
  • Genie 3060L
  • Genie H4000
  • Genie H6000
  • Genie IMS1000
  • Genie ISL950
  • Genie ISL950/B
  • Genie ISL980
  • Genie ISL980/B

  Compatibility can vary by opener production date and existing receiver configuration. Verify the opener model number and the part number printed on the original receiver board before ordering.

  Replaces These Receiver Part Numbers

  The Genie 36521R.S receiver board replaces several older or discontinued receiver numbers, including:

  • 20437R
  • 20437R.S
  • 31171R
  • 33629R
  • 34375R
  • 35593LA
  • 35593R
  • 36306R
  • 36520A

  Common Symptoms of a Failed Receiver Board

  This part may be required when:

  • Compatible remotes no longer operate the opener
  • A wireless keypad does not communicate with the opener
  • Remote range has become extremely limited
  • Remotes cannot be programmed to the opener
  • The opener works from the wired wall control but not from wireless transmitters
  • The original receiver board is visibly damaged or corroded

  Other problems—including weak remote batteries, incompatible transmitters, electrical interference, wiring damage, or a defective opener control board—can produce similar symptoms. Troubleshoot the opener before replacing the receiver.

  Package Contents

  • One Genie 36521R.S internal Intellicode receiver board
  • Attached antenna lead

  Mounting hardware, remote controls, keypads, opener control boards, and other replacement components are not included unless specifically shown or stated.

  Important Matching Notes

  This is a 390 MHz Intellicode receiver. It is not automatically compatible with every Genie garage door opener or every Genie remote.

  Before ordering:

  1. Locate the opener model number on the powerhead.
  2. Check the part number printed on the original receiver.
  3. Confirm that the opener uses a 390 MHz Genie Intellicode receiver.
  4. Compare the electrical connector and mounting configuration.
  5. Confirm that your existing remotes are compatible with the replacement receiver.

  The new 36521R.S board may look smaller or different from the discontinued 20437R board. This difference alone does not indicate incorrect fitment.

  Installation Notes

  Installation requires opening the garage door opener powerhead, disconnecting the original receiver wiring harness, transferring the mounting position, and routing the antenna wire correctly.

  After installation, all compatible remote controls and wireless keypads must be programmed into the replacement receiver. Previously stored transmitter codes do not automatically transfer from the old board.

  Always follow the garage door opener manufacturer’s installation and programming instructions.

  Safety Warning

  Disconnect electrical power to the garage door opener before removing the light cover, motor cover, or receiver board. If the opener is permanently wired, shut off the appropriate circuit breaker.

  Keep people and objects away from the garage door while testing the opener. Do not operate a garage door with broken springs, damaged cables, binding sections, or an improperly functioning safety-reversal system.

  Professional installation is recommended when the opener model, electrical connections, receiver compatibility, or proper programming procedure is uncertain.

  SEO Title: Genie 36521R.S 390 MHz Intellicode Receiver Board – Replaces 20437R

  Meta Description: Genuine Genie 36521R.S 390 MHz Intellicode internal receiver board for compatible AC screw-drive garage door openers. Replaces 20437R, 31171R, 33629R, 34375R and other older receiver numbers.