Garage doors have many parts that all work together including safety features.
Residential garage door goes down but goes back up unexpectedly.
Your limit switch needs to be adjusted.
But changes in weather conditions can causes your garage door components to shift or contract.
This is almost always the result of a dirty or obstructed safety feature.
Sometimes the sensors will be in alignment and just as the door gets close to being shut it will vibrate enough to push one sensor off.
When a garage door descends on command but then immediately reverses itself the problem is usually with the sensor eyes along the side tracks or with the door s wheels binding in their tracks.
You push the button to close the garage door.
When that happens the distance your garage door needs to travel may change.
But when the door begins to descend all on its own the problem may point to the opener s logic board or the circuitry inside the motor unit itself.
A careless or rushed parking job can cause the car s bumper to block the sensor.
Because a garage door opener is a complicated creature there s a lot that can possibly go wrong.
In cases like this your travel down setting simply needs to be adjusted to the new distance.
If the door goes up seemingly on its own after you close the door be sure to check for any debris the sensor is picking up.
It goes partway down reverses direction and goes back up again.
Find local garage door repair.
Your garage door sensor works by having two photo sensitive devices on either side of the garage door.