The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois
www.liftmaster.com
®
GARAGE DOOR OPENER| Model 3850PC |
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For Residential Use Only |
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Owner’s Manual
■Please read this manual and the enclosed safety materials carefully!
■Fasten the manual near the garage door after installation.
■The door WILL NOT CLOSE unless the Protector System® is connected and properly aligned.
■Periodic checks of the opener are required to ensure safe operation.
■The model number label is located under the light lens on the left side panel of your opener.