Craftsman door opener - 'jams' only when closing (w/ no door)

affekingNovember 2, 2007

I am having some issues with my Craftsman 41A5021-2D door opener. Its about 9 years old, so possibly near its natural lifespan.

About a week ago, it started jamming when going down. What I mean is that, even with the door itself disengaged, the trolly would attempt to move down somewhere between 1 and 3 feet before reversing, and then having the lights blink for 5 seconds followed by them staying on indefinitely. The sensors were not showing any blockage (the LEDs are solidly lit). I took it all apart and saw nothing wrong. I took off the chain and noticed it jamming even without that on. I then started toying with the controls that determine how far back and forth the trolly moves. After that it magically started working.

A week later, the same thing started happening again. Its pretty random how far it will go before turning back, and whether or not it does it at all. It never has a problem going up, but always going down. Playing with the force controls doesn't seem to change this.

Does it sound like an issue with the sensors or possibly the logic board detecting resistence when there is none? I find it unlikely to be a mechanical issue because it is so inconsistent. Anyone have suggestions?

If I do replace it, I'm thinking about getting a non-craftsman that I've seen with a better warranty. Anyone see a reason to not do this? I am wondering if the install is fairly standard, or if I might end up creating more work for myself if I change to a different brand.

Thanks!

By the way, there was a similar post to this in another thread, but my symptoms are slightly different.

http://ths.gardenweb.com/forums/load/garages/msg1221551423052.html

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don_1_2006

Your symptom points directly to the door sensors. Try tweaking them just a little and check. Sometimes they are right on the edge and this can cause the intermittent problem. I think I know the other opener you are referring to with a better guaranty. Do you really think they can guaranty a $150.00 unit that long?

    Bookmark   November 2, 2007 at 4:54PM
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affeking

I was thinking the exact same thing, and I did fiddle with the sensors quite a bit. I can confirm that moving them causes the light on the receiving unit to turn off, and pointing them at each other causes it to become solid again. I am pretty sure they are pointing as directly as possible at this point. I suppose I could have a bad sensor, but I don't know how to determine this. There is no way to temporarily override them as far as I can tell. Unless I can confirm that, it seems pointless to spend the cash to replace sensors on a unit nearing its normal time of death.

The other unit I was thinking of is about $220 (from Lowes), but I do agree that the warranty seems fishy. I'm guessing there is a lot of fine print and hefty shipping charges involved in getting repair work completed. It still seems like a better chance than the Craftsman 90 day warranty.

    Bookmark   November 2, 2007 at 6:14PM
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