Hormann SD5500 Garage Door Opener Circuit Board

Restore your garage door opener’s performance with the Hormann SD5500 Garage Door Opener Circuit Board Part # D437633. This genuine replacement logic board is designed to revive your Hormann SD5500 opener after issues caused by electrical damage, including lightning strikes. Ideal for troubleshooting non-responsive units where the motor light is off and the door won’t operate.

Before replacing, confirm whether the motor still attempts to open the door. If there is no red light on the motor and no movement, you likely need a full motor assembly. If the opener light is on but still non-functional, replacing the logic board may solve the problem quickly and affordably.

How to Replace the Circuit Board:

1. Unplug the opener from the power outlet.

2. Remove the light bulbs to access the internal housing.

3. Take off the plastic cover over the head assembly.

4. Locate the circuit board at the back of the head unit.

   • It’s held in place by four plastic tabs.

   • Apply gentle pressure to the two tabs closest to the motor to release the board.

5. Slide the board out from under the remaining two tabs.

6. Unplug the five wiring assemblies to fully detach the board.

7. Install the new board by reversing the steps above.

This circuit board is a direct-fit replacement and restores essential functions including remote reception and motor control. Don’t replace the entire opener—repair it with a trusted OEM component.