Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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The motor turns in one direction and will not

This is for the Craftsman 53920 opener. After replacing all the gears the motor turns in one direction and will not stop. If I manually turn the stop gear until it reaches the other end it will stop but then will not go the other direction. The lamp flashes 10 times. I know the blue wires and the red wires must be on the same side of the cap but does it make a difference which site is red and which side is blue.

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It isn't the capacitor. That thing just helps the motor start running and nothing else. Red or blue wires either side just so the same color is on the same little U shaped contact.

Check the wiring to the limit switch assembly. A wire may have come off or if you had them off make sure they are on correctly. Yellow wire to the up contact - Gray wire to the center contact and Brown wire to the down contact. The lamp flashing 10 times is telling you that you have a door sensor problem.

Posted on Nov 19, 2009

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Which Keyless Entry Pad should I purchase for the Craftsman 1/2 HP garage door opener model # 53920 ?


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10 beeps signal a blockage. This is what happens: the control board monitors the current absorbed by the motor; when a mechanical fault or something else is blocking the movement the motor automatically tries to overcome it by delivering more power, in the process absorbing more current; this current triggers the warning and the door system goes in danger mode - it returns the entire unit to the original state (fully closed or fully open). This happens like that so if someone gets caught it won't gets squished.
In your case the damage is internal, in the gearing between the motor and the chain sprocket - it occurred when you have tried to install the chain. You will have to completely dismantle the motor and its gearing to see what broke in it and fix it if possible. Worst case scenario: you will need a new unit.

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My Liftmaster GDO makes a clicking sound and won't open


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Jan 09, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Motor will not stop.


The wiring for the limit switch assembly is:

Yellow wire to the up limit contact

Gray wire to the center contact

Brown wire to the down limit contact

Nov 16, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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Nov 14, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Just replaced drive gear, door will move in open direction only


bet your working of a lifmaster chamberland or sears craftsman there all the same thing listen you have to limit controls on left side of operator if you looking at it from behind check the limit control in the middle of those to with cover off motor, also make sure both photo eyes are lit up soilid...

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