I replaced both front upper A-arms a few weeks apart, the right side no issues after removing the strut and reinstalling after replacing the A-arm (has a new Arnott strut Oct 16). When I replaced the A-arm on the left side I noticed the front left is dropping over night (the rear left is also lower). The front left side is an Arnott re-manufactured 2012 some time. I've removed the airline connection and reinstalled it again, I've disconnect the battery and held the terminals together for 30secs. The left side isn't dropping when left in the cold weather during the day, only when left in the garage over night.

Previously, I had a leak in the right front and the entire front would be down when cold, this time it's only the one side, the right doesn't drop.

Any ideas?

 

What year is the vehicle? It sounds like a rear is dropping. If you only have one height adjuster up front the vehicle should drop together.
All mine have started to leak over the last year. As I replace one strut, another is leaking. Hoping to swap a third one out this weekend. That will leave one original.