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Posted by Harry K on July 7, 2006, 10:01 pm
Tony Hwang wrote:
> John McGaw wrote:
> > Harry K wrote:
> >
> >> Recently the door would occasionally reverse when closing. Yesterday I
> >> couldn't make it close by pulling on it (figured the tension might be
> >> wrong). Disconnect and it would almost fall shut so no friction
> >> problem. Been awhile so I cleaned the IR sender/sensor. Closed. Aha!
> >> fixed it...nope. Did the same this morning. Tested the indicator
> >> light - yep, it is seeing the sendor. Cleaned again, door still won't
> >> close. Was just heading for the house when I noticed this little bitty
> >> sprig of cheatgrass with a flimsy head on it leaning in the door.
> >> Picked it and door fixed! That explained why it was intermittent -
> >> depended on how the breeze was blowing. It may have degraded the
> >> signal by about 50% which was apparently enough.
> >>
> >> Harry K
> >>
> > Yeah, it doesn't take much sometimes. I've had the reversal problem on
> > occasion and confirmed one time that it was caused by a spider. My guess
> > is that the movement of the door caused vibrations which were
> > transmitted to the sensor and sometimes they prompted it to move in a
> > direction which blocked the beam. So now I suck up all the little
> > critters that prefer those corners along with their webs a few times a
> > year with the shop-vac.
> >
> Hi,
> Stray light from sun does wonders some times too.
Oh yeah, BTDT have the T-shirt. That was one of the trouble shooting
things I checked while working on it.
Harry K
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