Here s a rundown of some of the possible reasons this can be happening.
Garage door keeps opening back up.
The button can easily get dirty and stuck in the pushed position.
A careless or rushed parking job can cause the car s bumper to block the sensor.
If your garage door won t open or close the problem could be a bent track a broken torsion spring or a bad capacitor int he motor housing.
Lubricating the springs hinges and other metal parts can help your door to move easily.
Your garage door sensor works by having two photo sensitive devices on either side of the garage door.
If these can t see each other when the door is almost shut it will send a signal to the garage door motor to open back up.
For series ii wall console you can remove the wires from the back of the wall console and touch them together to see if the garage door moves.
If this is the reason your garage door is not functioning properly the lubricant must be applied.
Check for reversed broken or cut wires.
In rare instances a nearby neighbor may have a garage door opener set to the same wireless.
If that isn t the problem then try opening and closing the door with the wall switch.
Try replacing the batteries in the remote and trying again.
Check the remote opener.
You push the button to close the garage door.
In cold temperature the space between molecules reduces making the metal shrinks.
If the remote opener is dirty or the batteries are failing it may cause the door to open on its own.
Be sure to double check if there is anything underneath the door if it continues to open back up after you close it.
Staples can cut insulation and short out the wires.
Clean the button as well as the connections in the housing if this is the case.
Another easy way to fix a garage door that opens by itself is by checking the remote opener.
It goes partway down reverses direction and goes back up again.
Your travel down setting needs to be adjusted.
Possible reasons why your garage door hits the floor then goes back up as is the case with so many issues at the home there s no one reason why your garage door closes then opens.
If it closes only partway the safety sensors are usually responsible clean the lenses or realign them and make sure there are no obstacles blocking the beam.
This will cause the door to open and close until the button becomes unstuck.
This is almost always the result of a dirty or obstructed safety feature.
Inspect the control wiring.
Replace the wiring if needed with garage door opener wiring.
Most likely this will resolve the situation.
In the case that the door responds to the switch then there s a good chance it s the remote that has an issue.
An exposed spot or a short circuit in the small gauge wire that leads from the garage.