I have a Genie Model 820 garage door opener and apparently I need to adjust the "Door Open Force Control.
I see a reference that this potentiometer may be on the units control board.
My question is how do I get to the control board? I think I may need to remove the outer cover of the unit - any hints on that to avoid removing too many screws or the wrong screws??
Thanks for any suggestions
Best in 2016 for all..
If there isn't an explicit access hole for this purpose, usually
you can just pull the metal/plastic cover off of the opener
(so you can actually see the mechanism as it is in operation).
The screws are usually fairly obvious along the *edge* of the
Often, the adjustment actually has a (crude) "knob" -- little
more than a plastic *shaft* -- that pokes out a hole, somewhere.
[Of course, be careful where you have your hands while the
unit is plugged in; you'd be annoyed if wife pulled up the
driveway while your hands were inside and commanded the
opener! :> ]
Keep one of the remotes in your pocket so you can test the setting
while still on the ladder. You'll quickly grow tired of climbing down,
walking over to the wall mounted pushbutton, then climbing back up, etc.
If the opener does NOT also have a limit switch (often inside the
mechanism) to determine "full up" (and/or "full down"), it could
rely on that circuitry to stop the opener at it's end of
travel -- not just when it encounters an obstruction, etc.
So, be sure you verify COMPLETE correct operation for the entire
open and close actions; be ready with your hand on the power cord
(most just plug into an outlet in the ceiling) as an "emergency stop".
If you drop bulb cover(white plastic) you may see how to drop power head
cover. It could be just snap in type with minimal screws. Genie
Or Genie customer support people are very friendly.
I'd be essentially 100% certain it (and the limit switch adjustsments)
will be accessible w/o removing the cover. Look for access holes w/ a
shaft or as another said even an external shaft. If no printed
markings, certainly would expect an indicator like an arrow of differing
width indicating higher/lower force or the like.
A quick looksee didn't find the manual online; post a few pictures of
the unit closeup on one of the hosting sites if can't identify from the
OP mentioned 800 series GDO and owner's manual shows pots.
How can you mount pots on the rail? The Youtube shows a screw drive
type with C motor, even older than Blue Max which gad limit switches
clipped on the each end of the rail.
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