Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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Door sometimes stops during run as if sensor is blocked

I have 1984 Craftsman 1/2 hp garage door opener. Just started having problems - door stops sometimes during travel like sensor is blocked(light blinking), other times runs good. Unplugged to reset - no change, wiring is good. Sensor(s) going bad or opener controls bad?

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Wipe off the sensor glass with a isopro rubbing alcohol; it should fix it.

Posted on Jan 15, 2009

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Craftsman 1/2 hp garage door opener will start to close and after 2-3 seconds it goes back up and there is no obstruction blocking sensors


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