I closed my garage door but when i came back home it was open. i just noticed it again after i left that the door opened by itself after i had closed it? The wall unit is Wayne Dalton model number 5BWS-A372U. I just changed the batter to the wall unit ot see if it is the issue.

Since the garage door only opens with the door unattached I would first check your garage door torsions springs. The garage door opener actually does not lift the door. The springs actually do the lifting. The most likely solution to your problem. Best Wishes, Frank Security Door Gate and Fence.

https://www.securitydoorgatefence.com

Note: For us, the garage door opener repair technician had to replace the sensors, even though they seemed to be aligned.

Hello, Wayne -

A few years ago we experienced a similar problem with our garage door. We had to call for service on the garage door opener. Fortunately, the previous owner of our home left a business card for the company which serviced the garage door when they owned the home. They left the business card tucked in behind the garage door opener power button on the garage wall.

Best wishes.

erase all of the codes and reprogram

The first thing I would do is remove the light bulb from the socket and try the opener. I have a feeling the bulb itself is bad or there is some arcing in the socket. Try unplugging the opener and prying out on the center connector of the socket.

Hi. I have seen this before, although usually not from chamberlain garage door openers.

Pull the release cord that unlocks the door from the opener, and manually open the door ALL the way open.

Then lock back in place in the open position.

Then use automatic opener to shut door.

It will close very slowly, but should close all the way.

Then, open the door again using the remote, and the door will once again open slowly, this time it should open all the way.

Then close door with remote, and door should now close as it is supposed, with the proper speed.

The slow opening and shutting is the system position sensor resetting itself.

This is why your door is acting up.

I would also look up by the belt drive connects to the front of the garage door opening, to make sure there isn't any dirt, cobwebs, or other obstructions on the sensor that may cause it to re-close the way it does.

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 continues 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.

In most cases, when a garage door opens or closes by itself, or when you find your door open, up 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 ta 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 which can also go bad. It is a process of elimination.

Sounds like the Logig board is going bad in your unit.

Your garage door springs may be out of balance. Try this test: Remove power from the opener motor. Pull the red release rope so that the door is detached from the openers drive. Lift open the door by hand- it should open all the way freely. Next, pull the door back down, stopping it about chest-high. It should remain where you stopped it. IIf the door is difficult to move, or does not stay half open, the springs need replacement or adjustment.