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I had a similar thing happen with an 8 year-old Liftmaster unit that
drives on the shaft that holds the torsion springs. Lots of safety
features so I am not sure my experience is relevant, but there might
be similarities.<br>
<br>
It turns out that the Liftmaster has a device inside that senses
that the cables are actually being driven. It's an electronic sensor
that confirms the drive is driving. They call it a "Traveler." Same
symptoms, but mine started out only going a few feet and reversing,
and then it got worse and only moved an inch or so.<br>
<br>
I called the manufacturer and the rep identified this module as the
problem. They sent me a new one at no cost, with elaborate
instructions on installation, even though the unit was 3 years out
of warranty. <br>
<br>
However, by the time it arrived, the opener seemed to heal itself
after I went through their prescribed diagnosis procedure (involving
counting the sequence of blinking LEDs) so I haven't had reason yet
to install the new part.<br>
<br>
The commonality in my situation and yours MIGHT be that there is a
device that senses the movement of the door in some way. In my case
it appears to be an electronic pickup that knows when a drive wheel
is turning. Mine was obviously confused.<br>
<br>
Jim<br>
<div class="moz-signature"><br>
<img src="cid:part1.rAeKTtq0.VO5RB5lf@snet.net" border="0"></div>
<div class="moz-cite-prefix">On 5/28/2025 4:17 PM, Moose wrote:<br>
</div>
<blockquote type="cite"
cite="mid:OF56E7A21D.1BAEC557-ON85258C98.006EE9D4-85258C98.006F7229@mail.megageek.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<font size="3">I have a 23 year old Raynor Powerhoist commercial
unit. (it's
for a 14' X 14' door.)</font>
<br>
<br>
<font size="3">Just out of nowhere, it started going up a foot and
closing.
Over and over again. </font>
<br>
<font size="3">I have all the remotes, and nothing changed. </font>
<br>
<font size="3">I also disconnected the door and the unit still
does this
so it isn't a door/spring/resistance issue.</font>
<br>
<font size="3">I live in the middle of nowhere, so there isn't any
interference
possible.</font>
<br>
<font size="3">There are no unusable noises. Unit is working fine
opening
and closing even with the door connected. No other noise or
issues. </font>
<br>
<font size="3">I haven't touched this unit, the door or the track
in
a long time. </font>
<br>
<br>
<font size="3">Anyone got any ideas?</font>
<br>
<br>
<font size="3">Thanks in advance</font>
<br>
<br>
<font size="3">Moose</font>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
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