craftsman garage door opener

targetaceJuly 15, 2008

I have a 1/2hp craftsman opener (139.53647SRT1 built June 1996). When attempting to close the door, it stops ~6" from the floor, goes back up and the lights blink. I've done the following:

Checked the sensors--the green lights are on both the gun and receiver.

relubricated the door and tracks.

increased downward pressure (door stops between half way down and 6" from floor...returned to original setting).

Need help....thanks!

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Anytime the door reverses to the open position and the main light flashes 10 times it is a sensor problem. Sometimes the sensors are aligned close enough to turn the receiver light on but not quite enough to satisfy the 'brain'. Tweak them just a little and try again. Also make sure the sensors are not loose and are moving as the door closes.

    Bookmark   July 15, 2008 at 5:06PM
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thanks, don.
Placed a level, horizontal and vertically on the sensors. Problem fixed!

    Bookmark   July 15, 2008 at 9:56PM
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i have a 1/2hp c/man GDO and i think i am having range problems. I will reset the system and then reprogram my 2 remotes and keypad into the GDO. They all will work fine in about a 2ft radius of the antenna sticking out the GDO, anything past that and they will not work at all. Have tried changing the batteries, thinking that could be the problem, but have the same issues. any ideas??

    Bookmark   July 21, 2008 at 7:49PM
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I had the same problem with my Genie GDO. It was a bad receiver board. Fortunately it was still under warranty.

    Bookmark   July 22, 2008 at 8:21AM
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