One sends a beam of infra red light to the other.
Garage door not closing unless hold button.
After i hold the button down to close it the sensor lights come back on.
Clutter or obstructions that block the sensor are the first problems to look for if your door won t close or in extreme cases open at all.
When this happens your garage door will only close by holding down on the wall button or wall console until the door fully closes.
Depending on the brand.
Turn off the sure lock aka vacation mode on the wall console check if limits are properly set check the door balance condition and door spring check opening force control or force settings.
This causes real hassle as i can t use my remote opener to open the door as well.
When it is fully open or close left sensor solid red right sensor solid green.
The transmitters remotes will not work to close the garage door.
You will find that the door will only move an inch or so in the close direction and reverse.
When the door is up the sensor lights are off.
Step by step procedures to try if the garage door of your home will not go down without holding the button before calling a repair man was this video helpful.
Here is what happening.
My garage door will not close unless i hold the button down.
The first was checking and removing the light in the opener certain lights or looseness of fittings can cause frequencies that can disrupt the remote signal and is in play when the door is freshly opened but not when it has been closed for a while which explains the asymmetry.
First check the sensor lights.