Bottom window sash doesn't stay up

Home Owner from Austin, TX
Sep 11, 2022 5:28 pm
Balance spring broken. Don't know the weight nor the coupling color.
3 user uploaded images
2 Replies

Tom from SWISCO
Sep 14, 2022 1:22 pm


Thanks for reaching out to us! This balance looks like it could be either our 3/8" diameter Series 400 or our 9/16" diameter Series 500. Unfortunately, the only way to determine the proper spring calibration is to weigh your sash. There's no way around that.
In the meantime, review the two products mentioned and see what you think.