Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
Until 3 months ago, the system was working fine.
About 3 months ago, the remote would work, but only when the light on the garage opener motor was off (after opening or closing the door there was a ~5 minute period where the remote could not open or close the door).
Recently, while resetting the garage door opener and remote via the button on the motor, it has ended up making the remote completely ineffective.
The motor unit is receiving the signal as the LED next to the reset button is flashing, but the motor is not responding.
The button on the wall works just fine still and opens / closes the door without any problems as always.
The same remote (alternate button) still works on the 2nd garage door opener.
The problem seems to lie in the wiring / relays in the motor unit, but I don't know where to look.
I have the exact same situation, except my model (139.53607) is older than yours and does not even have an LED. Remotes only works after after shop light goes off (5 minutes or so), but wall button works fine. Did call Sears Service and the tech told me the logic board is probably shot. Don't want to waste money on service call so I'll probably have to buy a completely new unit in the Spring and go through the winter without the use of a remote.
Posted on Jan 27, 2009
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Posted on Jan 02, 2017
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