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

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I have a Craftsman/Liftmaster garage door opener, 139.53635srt. It is 15 years old, but has always worked well. I now have the problem that it will not open easily. It will not open manually at all. If I stand between the sensors, blocking it, the door will go up about 4 inches, then if I press the remote, it will go up another 4 inches, inching it's way up until it gets about shoulder high, then it goes the rest of the way. The door closes easily using the remote or the keypad. Any suggestions of what to try.

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Hello,

The door opener is simply a machine, and machines are bound to have problems.

The problem with this door opener is with the mechanism that is opening the door.

It is worn out and needs replacement or servicing.

The mechanism is made of hard plastic, and it must have worn out, so the best bet is for you to open it up, check the worn out plastic and replace it with a new one.

It is easy to fix and the the parts are at any mechanical stores.

Take care

Posted on Jul 15, 2010

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