Single hung top window sash

A quick learner from Ruston, WA says:
Single hung window does not hold position when opened. The sliding portion of the window appears to rotate then slip from balance. Wondering if replacing the top sash guide would remedy the problem.
User submitted photos of a top sash guide.
Profile picture of Tom
Tom from SWISCO responded:
Thanks for posting! Please look at our 18-171 and let me know if this can work as a replacement.
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