pacca wrote:
I have lift-master garage door opener , at times when I close the door
it will reverse it self when it reaches the bottom , it's a chain drive
1/2 horse opener, any body have had this problem.Thanks

Shorten the down stroke just a tad.

--

I have lift-master garage door opener , at times when I close the door it
will reverse it self when it reaches the bottom , it's a chain drive 1/2
horse opener, any body have had this problem.Thanks

On Nov 3, 8:46*am, "pacca" wrote:
I have lift-master garage door opener , at times when I close the door it
will reverse it self when it reaches the bottom , it's a chain drive 1/2
horse opener, *any body have had this problem.Thanks

Very likely an electric eye problem, look at the leds, they usually
show if they are aligned and working. mine show green when they are
right, but every manufacturer does things a bit differently.

On Tue, 3 Nov 2009 08:46:16 -0600, "pacca" wrote:

I have lift-master garage door opener , at times when I close the door it
will reverse it self when it reaches the bottom , it's a chain drive 1/2
horse opener, any body have had this problem.Thanks

Check the photo cells for proper alignment and clean the lenses.

Next would be adjusting up/down force settings.

On Nov 3, 9:46*am, "pacca" wrote:
I have lift-master garage door opener , at times when I close the door it
will reverse it self when it reaches the bottom , it's a chain drive 1/2
horse opener, *any body have had this problem.Thanks

It's kind of funny how so many people assume that all GDO's are
equipped with electric eyes these days.

I'm sure that there are millions of older models still in use. I've
got one.

I would say that the three possible problems, in no particular order,
are

Down Limit Adjustment
Down Force Adjustment
Electric Sensors, if so equipped

Note: If adjusting the Down Force Adjustment solves the problem, you
might want to look for a root cause, such as binding near the bottom,
etc. Something is telling the force limiter to reverse the door, so
something has probably changed in how much feedback the sensor is
getting.

On Tue, 3 Nov 2009 13:38:20 -0800 (PST), DerbyDad03
wrote:

On Nov 3, 9:46*am, "pacca" wrote:
I have lift-master garage door opener , at times when I close the door it
will reverse it self when it reaches the bottom , it's a chain drive 1/2
horse opener, *any body have had this problem.Thanks

It's kind of funny how so many people assume that all GDO's are
equipped with electric eyes these days.

In this case I say the "lift-master" brand uses sensors.

I'm only familiar with one GDO maker (Mom N Pop) that makes an opener
where all the sensors are in the operator.

On Nov 3, 7:12*pm, Oren wrote:
On Tue, 3 Nov 2009 13:38:20 -0800 (PST), DerbyDad03

wrote:
On Nov 3, 9:46*am, "pacca" wrote:
I have lift-master garage door opener , at times when I close the door it
will reverse it self when it reaches the bottom , it's a chain drive 1/2
horse opener, *any body have had this problem.Thanks

It's kind of funny how so many people assume that all GDO's are
equipped with electric eyes these days.

In this case I say the "lift-master" brand uses sensors.

I'm only familiar with one GDO maker (Mom N Pop) that makes an opener
where all the sensors are in the operator.

I say Derby's point is valid. I have a Moore-Matic unit in my
current garage that is 24 years old and has no electric eye sensor.
I also have installed Sears units from back in the early 80s that had
no electric eye sensors. I'm sure there are pleny of other ones out
there that are still in use before the saftey reqt became mandatory.

On Nov 3, 7:12*pm, Oren wrote:
On Tue, 3 Nov 2009 13:38:20 -0800 (PST), DerbyDad03

wrote:
On Nov 3, 9:46*am, "pacca" wrote:
I have lift-master garage door opener , at times when I close the door it
will reverse it self when it reaches the bottom , it's a chain drive 1/2
horse opener, *any body have had this problem.Thanks

It's kind of funny how so many people assume that all GDO's are
equipped with electric eyes these days.

In this case I say the "lift-master" brand uses sensors.

I'm only familiar with one GDO maker (Mom N Pop) that makes an opener
where all the sensors are in the operator.

My statement was made as a general observation, which may not fit this
particular instance. I was merely pointing out that the "electric eye"
seems to be mentioned in almost every answer to GDO questions, with
rarely a "If you have sensors..." as part of the answer. It appears
that just about everyone assumes that every GDO in use today has
sensors.

My 198x Craftsman doesn't and the GDO's for the garage I store my
trailer in (GDO brands unknown) don't. It's a 2 car garage with 2
different brands of GDO's and neither of them have sensors.

My only point was that not all GDO in operation today have sensors, so
any suggestion that involves the electric eye probably should say
something like "If your model has sensors..." or "Assuming your model
has sensors..."

Keep in mind that in many cases we are answering questions for folks
without a clue so it might save some back-and-forth if we clarify that
point upfront.

That's all...no biggy.

In article ,
wrote:


The Sears/Craftsman openers are Liftmaster. I have one and it does not
have electric eyes. There is an adjustment for downward force
sensitivity. You adjust it by closing the door on a roll of paper
towel used to represent the family cat being squashed.

Cats aren't quite as stupid as babies. I don't think a million
chimpanzees closing a million garage doors a million times could squish
a cat.

"pacca" wrote in message
...
I have lift-master garage door opener , at times when I close the door it
will reverse it self when it reaches the bottom , it's a chain drive 1/2
horse opener, any body have had this problem.Thanks
Turn the down force adjustment screw 1/4 turn clockwise. I had this already
this past week on 2 of my 3 doors, and that did the trick for both.

On Nov 3, 8:46*am, "pacca" wrote:
I have lift-mastergaragedooropener , at times when I close thedoorit
will reverse it self when it reaches the bottom , it's a chain drive 1/2
horse opener, *any body have had this problem.Thanks


Try DFW Garage Door & Opener Repair for all of your Garage Door
Solutions
http://dallas.craigslist.org/dal/hss/1459624231.html

On Tue, 10 Nov 2009 16:36:45 -0800 (PST), Brandon
wrote:

On Nov 3, 8:46Â*am, "pacca" wrote:
I have lift-mastergaragedooropener , at times when I close thedoorit
will reverse it self when it reaches the bottom , it's a chain drive 1/2
horse opener, Â*any body have had this problem.Thanks


Try DFW Garage Door & Opener Repair for all of your Garage Door
Solutions
http://dallas.craigslist.org/dal/hss/1459624231.html
Either the limit switch is out of adjustment or the current sense is
set too low or both.