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Problem with craftsman garage door opener model#139.53985DM door goes approx. 4" from floor then reverses direction.... I have already adjusted the down force and down travel to no avail. It has a diagnostic code by the learn button it flashes twice fast then a pause then flashes twice more pause then flashes twice more...does this indicate a 2 flash code or a 6 flash code?? Any help would be greatly appreciated. This opener was manufactured 12/01/2010 I installed 2 of them in my garage same day and all is well with other one but this one just started this yesterday! WTF is wrong with it?

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That is a two-flash code. It means either the wires to the safety sensors have a short in them, or one or both sensors are wired incorrectly at the motor unit. What you describe sounds like there may be a break in the wire, and the door causes the tracks to move just enough to open that break in the sensors. There could be a staple through the wires causing a short (I've done that when using a staple gun), and that could be your problem. Check your sensor wires from the motor down to the sensors themselves, and be sure they have a little bit of wiggle room. If you find a staple or something has cut the wires and caused a short, you can separate the wires a bit, and wrap each side separately with electrical tape.

Posted on Sep 20, 2013

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Posted on Jan 02, 2017

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joel marks

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SOURCE: craftsman 3/4 hp garage door opener

not sure, but see the users manual here:

http://www.manualslib.com/manual/32293/Craftsman-139-5399.html

Posted on Mar 10, 2013

Gt Pirkl

  • 31 Answers

SOURCE: How do i program my garage ope

Take your old remote and point it at the new remote while pressing 'learn' (or you might only press learn and then shoot the old signal into the new remote). Almost impossible without the old remote though. Hope this works.

Posted on Apr 22, 2013

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YOU SHOULD BE ABLE TO STOP THE DOOR AND REVERSE IT BY GRABBING THE BOTTOM OF THE DOOR AS IT GOES DOWN AND LIFTING SLIGHTLY. IF YOU CAN'T GET THE DOOR TO BOTH CLOSE AND REVERSE WITH MODERATE PRESSURE YOU MAY NEED ADJUSTMENT TO THE DOOR / SPRING / ETC.
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1 Answer

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