Peach tree roller assembly

Thanks for reaching out to us. I'm sorry to hear you're having trouble. I'm not too sure what the issue could be. Some ideas would be that the patio door is binding up at the top of the track. It could also be the bottom track has some divots in it or the wheels could be binding. 

I recommend you inspect the top and bottom of the door track and make sure the wheels are adjusted properly so that the door lines up plumb with the jamb. Also, you can spray some lubricant like a WD-40 on the wheels. If the door is still hard to close, you will need to do a close inspection on the wheels themselves. You might need to take the door off the track to get a good look at the rollers as well.