LiftMaster 3850 Manual

Manuals and User Guides for this LiftMaster item

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My Liftmaster Beeps Every 30 Sec. Says Battery Needs Replaced. What Battery?

Smart Control Panel Not Working
I purchase model 3850 on May 6, 2011. The control panel screen is blank. It will flicker lightly whe...

How To Remove Power Back Up Battery?
I'm having problem removing this power back up battery, the owner manual does not give much informat...

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