Your garage door opens immediately after closing.
Garage door always goes back up.
Look for small led lights on the sensors.
When there is a short in your garage door transmitter you will often find the garage door is up upon returning home even though you know you closed the door when you left the house.
This is almost always the result of a dirty or obstructed safety feature.
If these are blocked in any way it will cause the doors to go back up so as not to injure children pets or damage that bike your daughter left on the ground.
You push the button to close the garage door.
A short in your transmitter causes a continues signal to be sent.
Your garage door sensor generally has two photo sensitive eyes on each side of the door.
Your garage door opens when it hits the ground.
If your garage door is closing fully and then reversing to open again then it may be due to a problem with the close limit switch.
There are four common problems with garage door sensors three of these homeowners can fix themselves.
Here s a rundown of some of the possible reasons this can be happening.
The garage door goes down then back up.
It goes partway down reverses direction and goes back up again.
If they re turned on in both the sensors then there is no issue with the power supply.
The garage door keeps going up and down.
The garage door will automatically go in reverse whenever it hits an obstruction such as the driveway or ground.
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.
A common cause of a malfunctioning garage door sensor is lack of power supply.
First check the sensor lights.
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.
You may think the door is workingok because it feels ok but you should still check all components to be sure.
In this case the garage door opener detects that it is coming into contact with.
Sensor power reconnect the sensor to its power supply.
Garage door opener keeps going back up.
In order to fix this you ll want to make small changes to the close limit setting until the door opener knows to stop once the door has reached the floor.
Your travel down setting needs to be adjusted.
Do any necessary repairs reconnect the opener and try it out.