Looking for replacement coil balance for window

Home Owner from Saint Peters, MO

Apr 24, 2026 3:19 pm

I started having issues with one of the windows in my home staying open and then not wanting to close all the way. After looking into it, I realized the coil balance had broken on one side and others were bent, so was looking into replacement parts. Seems like this is not something I can just find at my local hardward store, so after some research I ended up here. I can see numbers on the coil balance that say 4.5 35" and 3232208. Let me know if additional pictures are needed.

1 user uploaded image

4 Replies

Bob from SWISCO

Apr 26, 2026 11:55 am

Thanks for posting. See the 15-228 Pivot Shoe. For the coil springs, are they 1/2" thick? If so, and if they are stamped #4.5, see the S160-04 4.5 pound springs. For the covers, see the 15-150D double covers. Let me know if you have further questions.

Home Owner from Saint Peters, MO

Apr 27, 2026 11:02 am

Thank you. They are in fact 1/2" thick. Do you recommend that I replace all the coil springs for this window? (4 total, 2 each side). And can I reuse the old pivot shoes, or should I just replace those at the same time? Thinking the covers are ok since mine are not cracked or anything. Appreciate your assistance with this.

Bob from SWISCO

Apr 27, 2026 3:14 pm

These coil balance systems are modular, and you need only replace what is broken--that said, when it comes to the springs themselves, we generally advise replacing all of them in one go, since usually when one fails the others are not far behind. If they are 1/2", they are the Series 160 springs. If they are all stamped 4.5 then you need the S160-04 4.5 pound springs. The video below goes into more detail about spring weight choice. Let me know if you have any other questions!