i replaced a worn out gear and now the door won't go up or down more than about a foot. It goes, stops and goes back the other direction. what's up with this ?

Asked by jeff on 02/01/2012 2  Answers

ManualsOnline posted an answer 12 years, 9 months ago

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0 I recently replaced the whole sprocket gear set on both my Sears door openers also and on one of them the door goes up and down a couple of times and then goes up and will not go back down. I checked the rpm sensor and limit assembly (switched from my other opener) and it did the same thing. I cannot switch out the circuit board as they are different. One has the safety sensors and the other does not. Does anyone know what may be wrong?
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