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.
Sears garage door opener closes then opens again.
When the logic board wears out it can cause your garage door to close then open and vice versa without explanation.
Then during some cold winter day.
You have to keep adjusting till the garage door opens or closes fully without reversing.
The symptom of this is a garage door that is in constant motion opening fully then immediately descending only to start the same cycle again.
If this is a sears srt without external travel limit switches the internal travel limit is out of adjustment telling the opener to continue after the bottom of the door makes contact with the garage floor basically driving it into the ground until the force required exceeds what the safety system force is set at.
Look for trip arms or clips attached to the opener chain.
Until a year or so ago we never had a problem with it.
It is important to perform the safety reversing test after adjusting the force settings.
Operate your garage door opener.
These may be metal plates screwed on to the chain plastic snap ons dojiggies with flexible metal arms attached etc.
As these wires short against the housing the electrical impulse causes the door opener to activate.
Close the garage door with the opener and watch it closely as it closes.
If that doesn t fix the problem check the wiring between the motor unit and the wall control.
Your garage door s logic board is the brain of your garage door opener.
This brain can wear out in time so you could need a replacement.
There may also be loose wire connections inside the button housing itself.
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.
Hi in 2002 we purchased and had installed a craftsman 1 2 hp garage door opener model 139 53965srt.
Get logic board replacement.
There will be two on the chain one for the opening limit and another for the closing limit.
If the garage door does not close completely or begins to close and then opens back up again the down limit switch needs.
Else repeat the process once again.