[Shop-talk] Garage door opener issue

[Jim Juhas]

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.

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.

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.

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.

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.

Jim

On 5/28/2025 4:17 PM, Moose wrote:
> I have a 23 year old Raynor Powerhoist commercial unit. (it's for a 
> 14' X 14' door.)
>
> Just out of nowhere, it started going up a foot and closing.  Over and 
> over again.
> I have all the remotes, and nothing changed.
> I also disconnected the door and the unit still does this so it isn't 
> a door/spring/resistance issue.
> I live in the middle of nowhere, so there isn't any interference 
> possible.
> There are no unusable noises. Unit is working fine opening and closing 
> even with the door connected. No other noise or issues.
> I haven't touched this unit, the door or the track in a long time.
>
> Anyone got any ideas?
>
> Thanks in advance
>
> Moose
>
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