Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC
Sounds like the door is jamming or possibly needs WD-40 on the tracks and rollers. Also, it might need adjustment on the force on the way up. Be careful and just give it enough to do the job. Let me know if this works.
Posted on Nov 19, 2009
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Posted on Jan 02, 2017
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