Garage Door won't stay closed or opens too far - Limit & Force Adjustment Liftmaster

This is a common problem with garage door openers but luckily it is also really easy to fix if you know what to do. You want to be sure to take your time and turn the knobs in increments and test the door in-between adjustments. I am working on a Chamberlain Liftmaster ½ HP garage door opener.

In this video, I cover what to do if your garage door:
A. opens too far and hits the bolt,
B. does not open far enough,
C. hits the ground and bounces back open,
D. won't close all the way
E. closes about halfway and then re-opens.

Then I show you how to test the very important Safety Reversal System.

Best of luck with your repair!

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Disclaimer:
This video is only for entertainment purposes. Any injury, damage, or loss that may result from improper use of tools, equipment, or from the information in this video is the sole responsibility of the viewer and is to be used at the discretion of the end-user/viewer and not AdamDIY and or Adam Hill. If you are uncertain about any step of the process or feel unsure about your skill level, seek a more authoritative source.

[DrSneakyGD]

Moved into an new home, door wont stay closed. Always bounces back up.

This was very very helpful. We have been cautiously opening the garage door only in the morning when we know we have enough time for the motor to cool off and reset after the door wont stay closed after it would always come back up. With a few very very minor adjustments following your info I was able to adjust my craftsman garage door in 3 minutes and now we can worry less about our power-tools and bikes. I really really appreciate the post and the very clear instructions.

Keep up the great work, saved my ass from spending hundreds that I can't spare in a service call. Saved our summer.

[jimmoore]

Eight years later and you're still helping people. That was great. Thanks.

[lindyaubin]

Thank you so much. I am a senior living in a house by myself and quarantined thanks to that horrid virus and suddenly my garage door started banging into the light fixture, knocking it off and heading for the lightbulb it was protecting. Your instructions were so clear that I was able to stop that happening all by myself. I feel so clever and am grateful I did not have to call either a service person or my son who lives out of town. Awesome! So I subscribed. Thanks again.

[tai]

Thank you so much! Repair company told me repair would be $675 to fix. Fixed myself for FREE!!! Thanks so much!

[battheman]

One correction on adjusting the safety return. If you fail the 2x4 test DO NOT ADJUST THE CLOSE LIMIT. What you need to do is decrease the closing force gradually until it returns properly.
Your garage videos been very helpful for me. Thanks for sharing!

[TheCoolDave]

Thanks for this... I have been troubleshooting this for over a year, on and off... Garage door would close, then reopen, then BANG the stop screw. I purchased this home and it was like this when I got it. So seeing how you adjusted everything I figured some one else messed with it before me.  I went in the back of the opener and set everything to 0. The door would only go down 10%... PROGRESS !  So step by step..going up little by little and testing... WOW, after a year the DOOR finally stayed shut.. but, still getting the BANG on the stop screw...slowly adjusting, step by step...  It opens, does not hit the screw (about 2" from it) and stays closed.. Programmed to my car.. Very happy after a year.   Advice for people who were like me... set everything to 0 and go step by step.. .It worked perfect !

[bradgan]

Thanks Adam. Saved me some $ with this bouncing back up garage door. Really appreciate you taking the time to help people with this video.

[PresidentWayne]

How to install a gear and sprocket . . . . How to adjust the limit switches. Bam! Done. Gotta love YouTube and the folks who are smart and share their knowledge. Thank you sir.

[wisdomshare]

EXCELLENT instructions! Daughter pulled into garage, but, not quite far enough and once the door was 'stuck' on her back bumper it ended up closing too far and NOT opening up enough! After watching your video, I grabbed a screwdriver and fixed it in less than 5 mins. Thanks, saved me a headache and about a $150 'fix it' (service) fee! Now I need to get her bumper painted!

[albertzaza]

Adam - thanks a million; you just save me about $300 - to $400. I did the limit adjuster upward and that fixed my problem. My garage door was opening about a third of a foot upward and just stop. After watching this video, all's good. Again, thanks a million.

[mariagomez]

Great!!!!
I am a 62 yr old !!! and with your instructions I fix my garage door opener. I did have to repeat the process three times. I did it !!!
Thank you for saving me
Maria

[JamesTFaile]

Thank you for this. I replaced the main gear in my opener and I took it off the ceiling and messed up the adjustment screws. It took me over an hour after watching this to get it working, lined up, and safe again. Thanks for this video!

[richardcraniumdicksinn]

I would like to start with a huge thank you. I have been searching you tube for a good video that fits my application for a while. I came across yours watched it. Picked up what I didn't get with other videos. I spent 45mins adjusting my craftsman opener. Now it's dialed in.
Again thank you for the excellent video. Have a gr8 day & God bless.

[davidcantrell]

Unbelievable! I was going crazy on how to fix the door, because it would open as soon as you close it. You saved me ALOT of $$$ and time! Thank you!!

[rainey]

Thank you, Just got back from overseas with the door kept bouncing back open, viewed other sites (uuughhh) came across your site, with proper viewing/instructions, examples, etc....stopped the tape, went to garage, made the adjustment...garage door is working....Thank you, you saved me $200.00

[heavyelement]

wow. thanks for the help. i see 7 years have past. but i bought a new door motor was 15 years old but still packed in the box. you saved me countless hours trying to figure this out.

[kathleenkocar]

Fantastic! Mine suddenly started bouncing back up and a couple little turns of the lift screw and it's working just like it should! Thanks for a very informative video. Saved me a $100 service call.

[vmartinez]

Thank you very much Adam. I had the bounce back issue after replacing the gear I got from Amazon, was lost and now I'm found. I even adjusted the safety feature on my garage door. Kudos.

[enifled]

OMG thank I had no idea there were any kind of adjustment switches, so your simple instructions even worked for someone who has no clue. my garage door kept bouncing back up every time I tried to close it. Such a simple fix!

[lindagraves]

Me too!  I'm a fan!  It is about 5 degrees outside & I couldn't get the garage door to stop bouncing back up.  Five minutes spent on your video & I am now the Household Hero, thanks to you!  God bless you.