garage door opener won't stay adjusted

Sounds like problem is with the tracks- contraction in cold may cause some tigfhtening/ distortion. Cleaning them, lubing w silicone spray might help, including rollers/ all moving parts. You also may be able to increase the closing force- check with your manual if you still have, or manufacturer's web site if you don't. On mine (newer Genie) you have to open light cover to get at these adjustment knobs- check on yours- it may be quite obvious how to do it.

when is the last time you oiled the door? pulleys, tracks rollers etc,

the troublesome door likely has a bind

Is the connection bar, which connects the opener to the door, spring loaded? Usually they are; the sping absorbs the last inch or so of travel, in order to control the problems you indicate. Sounds like it might have a broken spring.

Pop

old answers at:

Sounds like the counterbalance spring on the door itself. Needs to be adjusted. Difficult to do, may need to get an overhead door service firm to do it. Most have a lock bushing that needs to be turned with a spanner wrench to add or take away counterbalance pressure. If you don't know what you are doing you could loose it when you loosen the lock bushing.

Sounds like it maybe spring tension and also a very thick greased rail or track. Clean limits and track. Relube with liquad teflon spray. let us all know if this helped best regards anthony

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