Question about Chamberlain Powerdrive PD422D 1/2 HP Security Plus Screw Drive Garage Door Opener

1 Answer

Garage door model PD200

The motor runs but the door won't open ( the chain won't move

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1 Answer

Take the back cover off and see if the Gear that turns the shaft that operates the chain to lift or close is in good condition.
The gear is probably plastic and 3" or 4" in diameter.
UNPLUG THE OPENER AND DISCONNECT THE POWER BEFORE DOING THE ABOVE.SAFETY IS ALWAYS FIRST.

Posted on Jan 16, 2008

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Posted on Jan 02, 2017

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Related Questions:

1 Answer

M otor hums but door does not open


If the motor is running and the chain or belt isn't moving, you have a broken gear in the opener.

Mar 26, 2014 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My sears garage door opener won't go up. Motor runs like it should, nothing moves. I also unhooked the door bracket. What might be the problem?


There are nylon gears inside the opener that drive the shaft the chain turns on that often wear and don't make contact properly. You can get your opener model # and serial # and order parts from www.searspartsdirect.com. Repair is fairly simple if you are somewhat mechanically inclined.

Feb 09, 2013 | 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

3 Answers

Motor hums but door doesn't move. If I disconnect door and give chain a horizontal poke, it will move. When I reconnect door it returns to humming, without movement.


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

Feb 04, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Liftmaster door opener, motor hums but chain and door does not move. Any ideas? Thanks


If the motor is running but the chain isn't moving you have a stripped drive gear. Remove the cover from the motor unit and check. It should be obvious.

Jan 08, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door chain isnt engaged. motor is running


SOUNDS LIKE A BAD GEAR KIT

IF THE CHAIN MOVES BUT THE DOOR DOESN'T IT WOULD BE THE TROLLEY RELEASE. IF THE CHAIN DOESN'T MOVE IT WOULD BE THE GEAR KIT.
HOPE THIS HELPS

Jan 03, 2010 | liftmaster Chamberlain Garage Door Opener...

1 Answer

Craftman door opener brand new wont work?


Sounds like the drive gear is stripped. Remove the cover and take a look. It is white nylon and is just in front of the motor.

Jul 04, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftsman opener motor works, but chain does not move.


If the motor is working but the chain does not move you must remove the cover on the motor and check to see that the chain is on the sprocket. If the chain is on the sprocket and the sprocket is not moving but the motor shaft is moving then the sprocket must be retightened onto the motor shaft.

Apr 20, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door opener motor runs, but the chain drive doesnt turn


If the chain is not moving and the motor is – you need a gear kit.

Unplug the unit - take of the cover – you will find white shavings inside – these confirm the diagnosis. .

Get the gear AND sprocket kit.

It’s a good DIY project but you MUST VERY CAREFULLY Follow the instructions step by step.

HOPE THIS HELPS

Mar 13, 2009 | Sears Craftsman LiftMaster Chamberlain...

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