Two things can cause this as well first there is an obstruction in the doorway and secondly safety sensors are misaligned.
Linear garage door opener sensor problems.
Finally it s possible the garage door opener s motor has burned out and isn t operating at all.
This is a problem that will require you or a service person to replace it.
Linear garage door opener not closing.
The most common problem with garage door openers is safety sensor misalignment.
A common cause of a malfunctioning garage door sensor is lack of power supply.
This video is for a linear garage door opener.
Look for small led lights on the sensors.
If the circuit breaker or gfci is tripping repeatedly it s a sign that there is a short circuit somewhere in the system possibly even the garage door opener itself.
The first is an obstruction in the path of the door and therefore in the path of the sensor.
Safety sensors sit about six inches off the ground by the garage door tracks and are always getting hit or obstructed in a busy home.
If they re turned on in both the sensors then there is no issue with the power supply.
When this happens the door will reverse when closing.
If you are having problems closing the garage door please che.