Question about Sears LiftMaster Building Materials
...light blinks for about 5 seconds. I've checked the wiring and tried to adjust the sensors, but nothing helps. What is wrong? You may have a broken door spring or a bad drive gear. Remove the cover ...
Question about Sears LiftMaster Building Materials
...light to go on either. The door moves freely when disconnected from the opener. My gut tells me the logic board is fried. What I'd really like to find is some sort of trouble shooting guide - Is ...
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