Question about Electrical Supplies
If u have carefully followed the programing instructions for the remotes then the radio receiver in the door opener unit is defective and must be troubleshoot and or replaced to cure the problem. Are u 100% sure u have the correct remotes and the correct programming instructions, double check that first, go to the Chamberland Liftmaster brand opener website and double check this info. Go to link below and verify programming instructions.
Posted on Jun 18, 2009
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Posted on Jan 02, 2017
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COULD BE A BAD REMOTE, I WOULD TRY ANOTHER ONE FIRST.
COULD BE A FREEZER ETC. PUTTING OUT INTERFERENCE.
Anytime a door opens and/or closes randomly or doesn't work consistently I look for a smashed wire between the motor unit and the 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 signal.
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
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