motor seems jammed


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Old 04-10-14, 08:14 AM
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motor seems jammed

3/4 hp chamberlain. suddenly, no matter what, the motor moves chain 1" and stops dead. no longer responds to wall unit sender. even when i try to manually adjust the up/down limits, the chain moves 1" and stops dead; push the up button and it goes up 1" then dead; push down and it goes 1" then dead; there is no automatic reversal when it stops; the chain just stops dead in its tracks. unit is 2 years old and has always been perfect. chain has decent slack and i see no source of binding. this happens with door disconnected. door opens and closes easily by manual force and is well balanced at 1/2 way open position. i am stumped.
 
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Old 04-10-14, 06:29 PM
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You may need to pull the cover off to check a few things. Two thoughts that come to mind are the optical RPM sensor or a problem with the main drive gear being stripped. If the gear is the problem you'll see white plastic shavings in the inside.
 
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Old 04-11-14, 03:17 AM
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Is this the new style opener from Liftmaster with the yellow up and down buttons on the circuit board?
 
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Old 04-11-14, 09:50 AM
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there are NO plastic shavings under motor in housing. the buttons: limit/white; force/blue; learn/yellow; up/greeen; down/red. the model # intertek is 2211-d. theere is also a separeate metal tab that says model # 24040/24050. this is a 3/4 HP built in oct, 2010. i have no idea how to attach a photo, although i tried to do so.
 
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Old 04-11-14, 06:20 PM
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I have never seen a chamberlian / Liftmaster with the push button setup you have described?
 
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Old 04-11-14, 06:30 PM
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Those look like door openers sold strictly by Menards.... sort of like house branded. The following link has some helpful info.

Xtreme Garage door opener help
 
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Old 04-11-14, 07:07 PM
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i have no idea how to attach a photo
http://www.doityourself.com/forum/li...-pictures.html
 
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Old 04-14-14, 10:26 PM
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thanks for the help. but, my menard's opener became toast after 2 years very of light use; lessss than 100 cycles. i replaced it with a liftmaster.
 
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Old 04-27-14, 12:35 AM
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A 1" movement and stop problem that happens when moving in the up and the down direction with no reversal is about 99% of the time going to be an RPM sensor gone bad
 
 

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