Need right and left Andersen window sash balancers

Quick Learner from Belleville, Illinois

May 9, 2026 5:09 pm

See attached pics of installed parts. Haven't removed them yet since top portion of window still works. House built in 1990. Need to replace both window sash balancers and can't find the exact part numbers. Looks like both my right and left have same part number. Please let me know which parts I need to order. Thanks

3 user uploaded images

4 Replies

Jasmine from SWISCO

May 11, 2026 11:49 am

Hey there,

Thanks for posting! You'll need the 24-939 Andersen Sash Balance to replace your balances. These used for balances marked with a 927, 931, 937, and 939.

You'll need the same balance to replace both the right and left hand balances.

Handy Person from Wellfleet MA

May 22, 2026 2:14 pm

My balancers look the same, corroded so I can read numbers. I rubbed a pencil over paper pressed against one and got the number E 54 9 27 5 83, or so it seems. Does this number mean I've got a 927 and should replace it with 24-939?

Thx!

Jasmine from SWISCO

May 22, 2026 3:16 pm

Yes, that is correct. The 24-939 can replace balances marked with a 927, 931, 937, or 939. They can be used for left and right handed applications.