Garage door openers especially old ones can be triggered by a number of things.
Garage door opening by itself troubleshooting.
Your garage door most likely uses two sensors to trigger its reverse mechanism.
Below are three reasons why your garage door opens on its own and some quick fixes you can try.
The symptom of this is a garage door that is in constant motion opening fully then immediately descending only to start the same cycle again.
Clean the button as well as the connections in the housing if this is the case.
Some people think it s from their neighbor s garage door opener.
Erase all codes in your remote and then reprogram it.
Having your garage door open when no one is home can be a huge security risk and messing with buttons and wiring can be frustrating especially if the opener still malfunctions after your best attempt to fix it.
As these wires short against the housing the electrical impulse causes the door opener to activate.
The button can easily get dirty and stuck in the pushed position.
To troubleshoot the garage door opener button make sure it s clean and free of debris.
This will cause the door to open and close until the button becomes unstuck.
When your garage door opens or closes when you haven t triggered the remote one possible cause is that a neighbor s remote was programmed at the same time as yours.
This is true only in rare cases though.
Whether you re using the passcode entry the buttons inside the garage or your remote opener the openers and the garage door itself must be on the same frequency.
If everything else is working well then it could be that the power in.
If that doesn t fix the problem check the wiring between the motor unit and the wall control.
If you clear all debris and any buildup from the sensors near the floor of your garage door tracks but the motion of your garage door tends to be partially closing and then reversing and opening again you may have a misaligned sensor.
If this is the case then replace the fuse or reset the breaker or gfci and try the wall switch again.