Opener Reverses When Trying to Close

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Old 09-20-18, 01:54 AM
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Opener Reverses When Trying to Close

Have 18 ft Door with Liftmaster 2220 Opener and 888LM Wall Control, 890MAX Remotes.

When closing door from either wall control or remote control, about 50% of the time the door only goes down (closes) about 12 inches or so and then reverses to fully open position. Some, but not all of the time it helps to hold the close button down until the door closes past the point where it reverses. When fully closed the door opens correctly every time.

if the door safety reversing sensors were preventing the door from closing, the lights on the opener would flash, and that's not happening. I believe the sensors are working correctly because I can start the door closing, intentionally break the beam, and the door reverses, and the opener lights flash.

Liftmaster (Chamberlain) Support had me disconnect and operate the door manually. When I fully opened the door and let go of it, the door would go down (close) to about that same 12 inches or so. So Liftmaster concluded that the door tension needed adjustment. This baffles me because the way it's acting, the door tension (or lack of tension) is actually HELPING the door opener to start closing. So why would this cause the opener to reverse?

We had our garage door/door opener company rep take a quick look at it while he was here for other reasons. He adjusted the opener's down force just a little (increased it), tried it a few times, and as Murphy would have it, it worked OK.

When he left Murphy stayed and he saw to it that our problem was not solved. I suppose I could take a few turns on the door spring tension as the Liftmaster rep suggested, but I am not convinced that's the problem, and don't want to mess with that torsion rod unless I have to.

Any thoughts on what might be causing this?

Thanks
 
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Old 09-20-18, 03:35 AM
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I don't know a lot about this model, but I will try. What number is the actual force settings on? *USE CAUTION WHEN TRYING THE FOLLOWING* To check the force setting... straddle the photo eye sensors and close the door down onto your shoulder, if it barely touches you and reverses it's too light of a setting.... If it tries to drive you into the ground its too strong of a setting. It should push firmly but reverse. I have seen bushings in the gear assembly go bad and cause the force setting to be increased to compensate for the resistance... but that is usually on achain drive, Not sure about the screw drive.
 
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Old 09-20-18, 10:56 AM
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Doorman,

Thanks. The down force is set at 6-7. And when I test it as you described it works properly. I have a good feeling for how much force should be there. I retired as a home inspector and have checked force on a few thousand doors.

I am still baffled.

EDIT - Just called door company. They are ending someone to look at it under warranty. Will see what happens. Will post results.
 
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Old 09-29-18, 09:17 PM
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Door Opener / Door guy made adjustments including shortening torsion spring cables and adjusting door open limit. Has worked flawlessly for 4 days.
Thanks,

CASE CLOSED!
 
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Old 12-14-18, 09:43 AM
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From a “Pro”

I’m glad you got it fixed!
In colder climates, your door may function well during the summer and have issues in the winter.
The springs tend to get stronger when cold temperatures arrive. You may have to adjust your force control a couple of times a year to keep the door working right, and also be safe.
The door is supposed to reverse on a 2” obstruction. So basicly set an object like a block of wood under the center of the door and close it.
Mid the door reverses you’re set up right, if not back off the down force till you achieve that result.
Here in MN it is a common issue and openers we install in July have a fluke here and there in January.
Springs can also loose strength or relax over time, this can also cause the need to adjust spring tension.

If you have any other issues in the future I’d be happy to give you some tips and suggestions!

Matt

 

Last edited by PJmax; 12-14-18 at 10:25 AM. Reason: removed link
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