15+ Tightening Garage Door Chain. The chain on my liftmaster garage door opener is sagging. When i press the button to open or close the door, it just hums.
When i press the button to open or close the door, it just hums. A loose garage door chain is not only noisy but also makes the system less efficient by forcing the opener to do more work. How do i tighten the i think you have more problems than just a sagging chain.
Full image for door chain locks with alarm push door locks …
Tightening the chain will extend the life of your garage door opener. I just changed the drive gear on my liftmaster 1/3 hp chain drive garage door opener and after putting the chain back on the sprocket, i tightened the the opposite side of the chain does not move at all. When i press the button to open or close the door, it just hums. This seems to match the manual better (it mentions the chain will sag a bit when the door is closed), so i think tension needs to be checked with the motor engaged, but i'm not sure.