Shoe or balance?
A quick learner from Minnesota says:
June 2, 2016
I just moved into a house built in 1995. There are 15 double-hung tilt-in windows. I can't find any identifying information on any of them. Most are incredibly difficult to open and close. I've tried adjusting the spiral balances, but still have a lot of trouble opening and closing bottoms and especially the tops. How do I know if the problem is with the shoes or the balances? How do I know if the spiral balances are broken of functioning properly? I'm not sure exactly how either is supposed to operate correctly.
Tom from SWISCO responded:
June 3, 2016
If adjusting the spiral balances doesn't do anything, then disconnect them from the pivot shoe and try to manually slide the pivot shoe up and down in the track with a screwdriver. Is it getting hung up? If not, then it's probably the spiral balances.