Craftsman Garage door openermodel #13953919D
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garage door opener opens by itself
2 identicle openers model 139.53919d... the unit that opens by itself is not using battery backup... both have wired switch and wireless keypads... codes to keypads are 1 digit apart... only recently has unit been going up byitself randomly...at first it appeared to go up after using other opener to close other door... but then much later opened by itself
Posted June 16, 2011
Jackie S, June 16, 2011
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Don, June 16, 2011
In most cases, when a garage door opens or closes by itself, or when you find your door open, upon returning home, the problem is due to a short somewhere. This short is most likely to be in one of two places: either in one of your transmitters or in the wall button or its wiring. 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. A short in your transmitter causes a continuous signal to be sent. As you are pulling out of the driveway the garage door closes fully and appears to stop, but as the carriage and arm run past the down limit and hits the header bracket it reverses, and the door begins to open, just as you start driving off down the road. You come home to find the garage door is up, as if someone else had opened your door. The best thing to do to troubleshoot the garage door problem is remove the batteries from your transmitters and try operating the door from the wall button. If the problem is intermittent, you may want to do this for a day or two to eliminate the transmitters as the culprit. If the problem persists, try removing the wall button wire at the motor head to ensure it is not a short in the wire to the button, then try operating the garage door with the transmitters only. If it stops the problem, replace the wires and test the wall button. It is a process of elimination.
Jimmy K , June 17, 2011
The answer Don sent has good troubleshooting information. Thanks Don.
I am sending you some other possibilities you can check. We have also seen the logic board on the opener that is operating correctly cause another opener to open intermittently. You can disconnect the power to the opener that is working ok to test this.
Intermittent ghost openings on garage door openers is usually caused by radio frequency signal (rf) in the area. Radio frequency confuses the logic board in the opener and it will open or close on its own.
To search for something in your home that might be causing rf, begin by removing the battery from 1 remote. If there is no change put that battery back and remove the other one. Unplug one garage door opener, if there is no change plug that opener in and unplug the other one.
If you have lost or replaced a remote in the past, search through drawers and the couch and chair cushions for the missing remote and remove the battery. These are the most common reasons for intermittent openings.
To determine if the rf is coming from something in the garage or house, turn the house circuit breakers off one at a time. It is not possible to leave some circuit breakers off for several days to test. If you don't find anything causing the short range, you can schedule service and get a Sears technician to check the openers. Sears technicians carry a meter that will find the source of the rf signal.
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