Window coil balance

Home Owner from New Mexico

Aug 16, 2025 11:36 am

Hello. We recently moved into this home and have a window that doesn't open smoothly or easily. Attached are pictures of the window coil balance. Besides the patent numbers it looks like part # 801020 is the only identifier. There is also "B2" listed on one of them as well. Thanks for any help you can provide.

2 user uploaded images

4 Replies

Bob from SWISCO

Aug 17, 2025 1:08 pm

Hello there. I am confident we can replace these coil balances, but we'll need you to remove the assembly and tell us the thickness or width of the coil tape. We'll also need a picture of the pivot shoe the springs attach to. We should be able to narrow it all down from there.

Home Owner from New Mexico

Aug 17, 2025 4:31 pm

Hello, attached are all the pieces. The tape looks to be 1/2" wide, the one attached to the shoe is labeled 9#, 35", the one coil attached to that one is labeled 7.5#, 35".

3 user uploaded images

Bob from SWISCO

Aug 17, 2025 11:06 pm

This is perfect, thanks. The pivot shoe is the 15-199. The 1/2" wide coils are the Series 160 springs. For a spring stamped '9', use the S160-09 9 pound spring. For a spring stamped '7', see the S160-07 7.5 pound spring. For new coil housing, see the 15-150D Double Housing. Let us know if you have further questions.