告诉你们一个秘密,很多opener的齿轮是塑料的,用个若干年就坏了。楼下有人说就要换新的opener。我想起来以前我碰到一个师傅给换了那个齿轮,收多少钱忘记了,但是那个零件Amazon上面都有:https://www.amazon.com/Ezyopenteck-Replacement-Liftmaster-Chamberlain-Craftsman/dp/B08PDNRKGC/ref=sr_1_1_sspa?crid=Y9QYSISXNEPM&dchild=1&keywords=garage+door+opener+gear+kit&qid=1618415522&sprefix=garage+door+opener+gear+%2Caps%2C219&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyVjUzN0NNUTk1TVRSJmVuY3J5cHRlZElkPUExMDI5ODUzMkZKV0RNVlo1NEtEMCZlbmNyeXB0ZWRBZElkPUEwNDc0NDQzMzBWR1I1WjgwTk1IWiZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=
上youtube去找找看,应该有视频哈