We have a sliding glass door in our kitchen that opens from left to right. The last two/three winters, we noticed it started to stick/rub at the top when about 12-15 inches open, eventually in the winter it would not open past that point, not good in an emergency.
In the spring, it would start to open more readily, but I had to drop the sliding door down a notch on its rollers. Eventually this will not be an option anymore.
I was thinking maybe something/water was getting into the top of the door and forcing it down. There is an inside bathroom fan exhaust that comes out about 2 feet above the door, more to the opening side.
I went outside and took off the vinyl siding but did not see any evidence of water problems or anything like that.
We do get water/ice sometimes at the bottom where the two door meets from cold air coming in thru a small opening that leads to the outside. Maybe ice is builing up under the track and forcing that up, instead of the top being forced down ?
Any advice appreciated ...