Inconsistent door opener
Our Genie garage door opener has been acting strange lately.
Sometimes it works fine, but other times (maybe 50-60% of the time) it will go up about 18 inches and stop dead. Hit the button again and it drops back to the ground.
If you hit the button again sometimes it goes right up and sometimes it stops dead in the exact same spot again.
I don't see any obstruction in the tracks that would make it stop like that, but the fact that it's been going up and down perfectly normally other times makes me think it's not the opener itself.
We've had some freeze/thaw cycles recently, but I'm guessing that wouldn't have warped the tracks.