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Posted by DerbyDad03 on November 3, 2009, 4:38 pm
> 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, =A0any 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.
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Posted by Oren on November 3, 2009, 7:12 pm
On Tue, 3 Nov 2009 13:38:20 -0800 (PST), DerbyDad03
>> 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.
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Posted by on November 4, 2009, 9:33 am
> On Tue, 3 Nov 2009 13:38:20 -0800 (PST), DerbyDad03
> >> 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, =A0any 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.
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Posted by DerbyDad03 on November 4, 2009, 10:33 am
> On Tue, 3 Nov 2009 13:38:20 -0800 (PST), DerbyDad03
> >> 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, =A0any 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.
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Posted by jamesgangnc on November 4, 2009, 2:02 pm
> On Tue, 3 Nov 2009 13:38:20 -0800 (PST), DerbyDad03
> >> 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, =A0any 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 have a liftmaster without sensors. Liftmaster made gdos before
sensors were required. And mine is only 18 years old so I'm thinking
there are plenty still out there.
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> will reverse it self when it reaches the bottom , it's a chain drive 1/2
> horse opener, =A0any body have had this problem.Thanks