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

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GAREG DOOR OPENER BLUES

TROUBLE CODES FOR GARAGE OPENER.MODEL 139.53960SRT IT IS A CRAFTESMAN 1/2 HP.IT JUST FLASHES TROUBLE CODES BUT I DO NOT KNOW WHAT THEY MEAN.ALLGEARS,BUTTONS.EYES ARE ALL WORKING.IT FLASHES FIVE TIMES.PLEASE HELP.

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The code for 5 flashes is "RPM sensor or motor overload." Usually the problem is the door has opened too far and is jammed against the bolt just in front of the motor unit. If so, remove the bolt and then adjust the 'up limit' on the side of the unit. Turn it a couple turns in the opposite direction of the arrow printed on the cover. Remember to replace the bolt.

Posted on Apr 29, 2009

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Posted on Jan 02, 2017

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Don't know Mod. No. lost installation manual, approx. 5 yrs. old Need installation manual.


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My garage door does not want to close but it will open with no trouble I reset it but it still does the same thing the one I have is 1/2 HP model #139.54985 can you help me?


You need to check your sensors first. If they are lit and aligned, increase your down force. Have you recently had the springs adjusted or serviced by a garage door tech? If so, force probably needs to be adjusted and the tech failed to adjust it accordingly. If not, one of your sensors is probably misaligned which is usually the problem.

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My garage door does not want to close but it will open with no trouble I reset it but it still does the same thing the one I have is 1/2 HP model #139.54985 can you help me?


sounds like a relay malfunctioning or mother board issue----that's if you haven't damaged any sensors or had lightning strike----usually you push the button to start it going in the up or down then you push the button to stop it then push it again to go in the opposite direction----I don't know how your operating this with a remote or on site switch so it's hard to fathom what's wrong with limited info----it's like trying to cut hair over a telephone

Mar 01, 2015 | Craftsman 1/2 HP CHain Drive Garage Door...

1 Answer

Craftsman 1/2 HP garage door opener Model 139.53962SRT1 and am getting 5 error code flashes.


That code is for "RPM sensor or motor overload." Check to see if the trolley is jammed against the bolt just in front of the motor. If it is, loosen the chain enough to take off the stress and then run the opener until the door closes. While the door is closed locate the 'up limit' control on the side of the motor unit. Turn this control 2 full turns in the opposite direction of the arrow printed on the cover. Tighten the chain.

Jul 15, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My garage door opener is flashing a code 4 flashes then a pause then 1 flash then a pause then 1flash any ideas?


4 flashes is the code for door sensors slightly misaligned. The code you describe is not a normal trouble code. What is the door doing?

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you probably have a garage door opener that changes the code after each opening. I had to push a button on the door motor and then run to the car and push the opener button within 15 seconds. Your car salespwrson is usually an expert at this.

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Garage door close up to 1/2 of the garage


try adjusting the doors down travel , depending on your brand and also check your sensors and pressure sensitivity ,if none of the above the next step would be replacing the logic board , that also controls the functions of sensitivity and travel adjustments , hope this helps , please leave good review if i was able to help Sincerely Glenn

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

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