Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
Problem for Sears Craftsman LiftMaster Chamberlain Garage Door Opener...

My opener will work if I hold the wall button down




By thotujec on Nov 07, 2009

" "
My Quantum 3212 opener will work if I hold the wall button down through the entire cycle. If I just push the button and let go, it only travels about 12 inches and returns. What can I do?

Solution #1

posted on Nov 09, 2009
Not Rated)

Don0930

Rank: Guru  Televisions & Videos  Expert
Rating: 88%, 580 votes
Sounds like your door sensors are out of alignment or have gone bad. They each have a small light that should be on and not flickering for them to work properly. Tweak them a bit to get them aligned and check. If you can't get both lights to come on you either have bad wiring to them or a sensor that has gone bad.
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