Question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC
I replaced a gear sprocket kit on my lift master..... because the mortor was running and nothing was happening. Now the same thing is happening, what is causing this to happen?
Posted on Nov 12, 2009
There are internal limit switches that look like little plastic wheels on a screw. if these wheels dont push the buttons in on either side as it travels it will try to keep traveling see if you can locate these plastic wheels and the switches they push in both the full up and full down position and make sure they are actually pushing the levers
Posted on Oct 10, 2009
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Posted on Jan 02, 2017
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