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Remote will not activate Craftsman garage door opener

I have a Craftsman garage door opener model No. 139.53985DM with keyless entry that I purchased and installed in August of 2010. I had no problems until two weeks ago when the opener stopped responding to the remote. The opener still responds to the wall control and the keyless entry so I tried reprogramming the remote as described in the owner's manual. Although everything goes as described in the manual when I go through the reprogramming, the opener still won't respond to the remote except that when I push the remote button, the LED flashes quickly 3 times. I haven't replaced the battery since the battery should last longer than 6 months and the fact that the LED flashes tells me the opener is getting a signal from the remote. Per the troubleshooting manual, the 3 flashes should indicate a problem with the wall wiring or the wall control. I don't believe this is the case since the wall control works fine and the keyless entry activates the opener. I would expect that a shorted wire would cause the wall opener to fail. What doesn't make sense is that the opener responds to a signal from the keyless entry but not the remote. That being the case, I assumed the remote was not functioning, but since the LED flashes when I push the remote button it seems that the remote is providing a signal to the opener. Is the remote not reprogramming properly even though the indication on the opener is that it has been reprogrammed? Having no other troubleshooting information in the manual I'm not sure what needs to be replaced. Thanks in advance for your help.

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Manage My Life
On the back of the main opener unit you should see a "learn" or "SRT" button next to the LED indicator. Press the "learn" button and hold it down until the LED goes out. Now, no remotes or keypads should work the opener. Get one of the remotes and then press and the "learn" button, now the LED should begin to blink. Press and hold the button on the remote until the main lights blink. Now try the remote and see if it works. If it does, program in the other remote(s) and the keypad device and check everything to make sure it working as it should.

If the remotes still will not program in there is very likely an issue with the logic board.

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by Manage My Life
March 18th, 2011
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Manage My Life
Thanks for trying to help, but the link addresses a case where the keyless entry didn't work either so the receiver was probably the problem. In my case, the keyless entry works but not the remote so I don't think the receiver is the issue. The expert also suggests calling Sears which I tried. They are willing to send out a technician but wouldn't provide any advice beyond that.
by Manage My Life
March 18th, 2011
Answered in 32 minutes
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Manage My Life
I'm sorry that you are having some difficulties with your garage door. I did some research for you at managemylife.com and found an expert answer to a similar question that may assist you until your expert can respond. I have attached the link below. I hope this helps.
by Manage My Life
March 18th, 2011
Answered in 7 minutes
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