Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
I replaced the gears and the motor will click and hum a little. If I use a plier to turn the shaft coming out of the motor the opener will work a couple of times and then stop working. The yellow light on the back flashes constantly. Any suggestions or advice
Does it simply click then hum? or does it sound like something's moving inside? if you can hear movement inside I'd guess stripped gears. if it just hums I'd have to agree that the chain is bound somewhere. Either way it doesn't sound like it's the electric eyes to me. You should be able to bypass them if you still want to but you have to know if your model uses NO or NC contacts first.
Posted on Feb 18, 2009
Motor is over heated shut down unplug 30 min
Posted on Feb 17, 2009
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Posted on Jan 02, 2017
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Jan 25, 2011 | Sears Craftsman LiftMaster Chamberlain...
sure you put the black cup back on the end of the motor shaft and
that it is pressed all the way on. Make sure the RPM sensor is
plugged in. If neither of these are the issue, then you probably did
not have the motor shaft pushed all the way back when you tightened
the coupler after replacing the worm gear. Loosen that coupler up and
from the front of the motor (opposite end in which the coupler is on)
push the shaft back as far as it will go. Hold it there while you
tighten the coupler back up and then try it.
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