Hello, Paul -
The problem may lie with the sensors for the garage door.
The sensors have always been the problem for us (after we have put new batteries in the garage door opener remote controls and made sure the remotes are synced with the opener.)
This article from the San Francisco Chronicle provides instructions for testing garage door sensors:
http://homeguides.sfgate.com/check-garage-door-sensors-working-35321.html
Best wishes.
SOURCE: garage door opener key pad not working
so i spent the better part of this morning trying to figure this same thing out... here's what I found.
You need to identify the serial number, which is found on the unit hanging from the ceiling... it will be like a 13953970. I found mine behind the lamp light protector thing. NOT the back with the stickers. 41A5021 is actually not the number that is important.
then go to www.managemyhome.com its a website ran by sears. you have to register, for free. then go look for manuals, in one of the tabs running across the top of the site is a choice for manuals. then search by Craftsman then enter the serial number.
then pull up the owners manual and check out the instructions.
** i found out that the old house i bought did not actually have the same keypad opener as came with the craftsman. so i had to closely inspect all sides of the internal keypad opener (not the one outside) and find another serial number. then i went and got the manual from www.managemyhome.com and realized i needed to add a new 9-V battery before I could proceed. So now i'm heading out to walmart to get that.
after a frusterating morning of service number and internet searches I hope after I get this damned battery the clouds will part and god will shine some luck on me.
goodluck to yourself!
SOURCE: remotes quit working for garage door
I had the same problem with my Craftsman opener but different model. However to fix this I simply followed the instructions that came with the opener and reprogramed the remote to the opener. The instructions are in your owners manual and are pretty straight forward.. John
SOURCE: Remote Garage Door Openers won't work
Does your wall console have a LOCK or VACATION setting. Turn off.
SOURCE: Liftmaster 1/2 HP Garage Door opener won't open or Close
The shaft on these garage door motors are not direct drive systems. You'll have to open up the box to see what the actual problem is. I have had stuff like this happen where a gear just slipped out of place.
http://www.aaadooropeners.com/?gclid=CLH3wt628p8CFVZS2goduwSLYQ
Here is a link for a parts supplier. I don't know your model but it looks like most of the Liftmaster worm screw gears and drive gears are plastic so it's possible that one of them has cracked.
SOURCE: garage door opening/closing problem
Could be a bad wall button or a smashed wire.
Anytime a door opens and/or closes by itself, or remotes work intermitantly I look for a smashed wire between the motor unit and the wall button or a bad wall button.
If the wire is smashed the insulation becomes so thin that power will leak thru the insulation and activate the door or interfere with the remote.
Loosen the staples with a small screwdriver and slide the wire about ½ inch to move any areas of thin insulation away from the staples.
The second thing would be a bad wall button or a remote with a sticking button.
Or a remote in someone’s purse that gets the button pushed by other stuff in the purse.
The test is to disconnect the push button wires at the power unit. If the self operation / interference stops you have located the problem. If you reconnect the wires and disconnect the wire at the wall button this will tell you if the problem is the wire or the button.
HOPE THIS HELPS
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