Several of the mechanisms that retains the windows in the sash and also allows it to tip into the room for cleaning had broken on our Window City Hung Vinyl Windows that we had purchased through a dealer back in 2012.
Unfortunately the dealer was no longer in business and after contacting Window City's service department and explaining my situation, I was offered two choices: 1. I could order the required number of latches and they would be sent to me at my expense (a nominal cost for parts & shipping) or 2 . If I could come into their head office, I would be given the parts at no cost.
Since I don't live that far from their facility I chose to stop by one afternoon and was able to pickup the parts I needed. The installation of the new (updated) latch mechanism was explained to me by the service manager and I was quickly on my way.
Installation of the new parts was as described and now my windows are working like new!
I was skeptical about after sales service from the manufacturer before my interaction but would not hesitate to recommend them to others or use their products again.