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Fix my Craftsman 139.53973SRT garage door opener? When the button is pushed, the motor runs but the chain doesn't move. When I get on a ladder and try to pull the chain (help it along) it will move o

I don't know what else I can add. I called Sears repair but they want $99 just to come out to diagnose the unit. Parts and labor would be extra!

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Pull the cord that releases the traveler from the door and manually raise and lower the door to make sure the door isn't binding anywhere. Then actuate the opener and watch to ensure the traveler moves along the rail. If this is all successful, you may need to adjust the sensitivity of the opener.
Good luck!

Posted on Nov 26, 2014

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1 Answer

Fix my Craftsman 139.53973SRT garage door opener? When the button is pushed, the motor runs but the chain doesn't move. When I get on a ladder and try to pull the chain (help it along) it wil


If you disconnect the chain from the door (like you would do if the electricity went out and you needed to get the car in/out). Can you easily open and close the door by yourself? (it should not slam when closing).

If not then your springs could be bad or not set to the correct torque.

If you can open and close easily the door then there could be a issue with the motor or the gearing. BTW sears does not make garage door openers. They have OEM's rebrand their with sear's label. You don't need to have sear come out maybe a generic garage door person or even a handyman. But unless it's under warranty it won't be free.

Nov 26, 2014 | Building Materials

1 Answer

I have a Craftsman/Chamberlain 1/2 hp 315mhz Garage door opener model 139.1845.DM just stopped working. The motor runs the chain moves, the door doesn't open. Whether I use the remote or pad still n


All garage door openers have a quick release. Have you checked to make sure that is locked in place? Most have a cord hangin from it and you pull it which releases it from the chain. Make sure that is engaged and it should work.

Dec 02, 2011 | Home Security

1 Answer

Liftmaster - push button to open door, motor runs as normal but chain does not move to raise door


Remove the cover from the motor unit and check the drive gear. It is a white nylon gear just in front of the motor and I am sure you will find it is stripped. The part number for this gear is 41A2817 and is available at any good door opener service company. It comes with instructions.

Sep 06, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door does not open or close


You have a stripped drive gear. Remove the cover from the motor unit and you will find white sawdust all over. The part number for the gear kit is 41A2817 and is available at any good door opener service company. It comes with instructions.

Feb 12, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

When I push the button to open my garage door, the


Remove the cover and take a look at the drive gear. It is white nylon and is just in front of the motor. It is probably stripped. It is a good time to release the door from the opener and try raising it by hand. Your door springs may be weak or possibly broken.

Oct 15, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have a Sears Craftsman 1/2 horse garage door opener. When I push the button, I can hear it hum, but the chain won't move and it seems the sprocket is frozen?


If your door is stuck in the open position you will find the trolley is jammed against a bolt just in front of the motor unit. Remove that bolt and run the opener until the door closes. Now locate the 'up limit' control on the side of the motor unit and turn it 2 times in the opposite direction of the arrow printed on the cover. Replace the bolt.

Sep 03, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage Door opened but will not close. I opened


I think the trolley has jammed against the bolt just in front of the motor unit. Remove the bolt and then run the door until it is closed. With the door closed locate the 'up limit' control on the side of the motor unit. Turn this 2 turns in the opposite direction of the arrow printed on the cover. Replace the bolt.

Sep 01, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Sears Craftsman Garage door opener does not open or close


The drive gear is most likely stripped. It is a white nylon gear just in front of the motor. The parts number is 41A2817 and is available from Sears or any good door opener service company. It comes with instructions.

Jun 03, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Motor works but does not move chain on half horse sears


Clutch? need more info.. wall mount or overhead? If it's wall mounted it could be the clutch, I don't think overheads have a clutch though. The first thing I'd do is get on a ladder and see if the chain is still attached to the sprocket... good luck

Feb 17, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door won't close unless i push button on wall several times


You probably have a stripped gear inside opener. Take off cover and the bottom will be filled with white flakes from stripped gear

Jan 23, 2009 | Sears Craftsman LiftMaster Chamberlain...

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