The fob that you carry on your keychain or use to open the garage door is actually a small radio transmitter. When you push a button on the fob, you turn on the transmitter and it sends a code to the receiver (either in the car or in the garage).
What is the transmitter on a garage door opener?
The remote control is a transmitter, and there is a built‑in receiver in the garage door opener. The remote creates a radio wave on a specific frequency (usually 315 or 390 MHz). The receiver picks up that signal, and either opens or closes the door depending on what is needed.
The Push Button Transmitter triggers a Bellman Visit receiver (sold separately) to alert you when the button is pressed. It’s that simple. Mount it as a doorbell, or use it to get someone’s attention in your home. A Bellman Visit receiver is required to receive alerts from the Push Button Transmitter.
The one button just opens the garage door. The three button has one to lock the door (if compatible) and one for the light.
How do I reset my garage door transmitter?
Erase your remote controls and keypads using the LEARN button on the garage door opener
- Locate the LEARN button on the garage door opener.
- Press and hold the LEARN button on the door control until the LED turns off (approximately 6 seconds).
- All previous codes are now erased.
Where is the receiver on a garage door opener?
The receiver on a garage door opener is located adjacent to the motor, within the outer cover of the unit. When you press the button on one of the remote units, or otherwise send a signal via your phone, the signal is transmitted to the receiver, activating the motor.
Will any LiftMaster remote work?
LiftMaster MAX remotes work with all 315 MHz or 390 MHz LiftMaster garage door openers manufactured since January 1993 (that is, all LiftMaster, Chamberlain, and Sears Craftsman openers that have a green, orange, red, purple or yellow learn button and a yellow antenna wire).
The “Learn” button has two functions. Press and release the “smart” button on garage door opener motor unit.