Andersen Window Sash Balances

A home owner from Flanders, NJ says:
I have pulled the head stop from my Andersen window and the sash balance has a code of E30 3#27 9-85.
I assume the 9-85 is the date code. I bought my house in 1986. None of your replacement sash balances have the code. Can you tell me which of your sash balances to use?
By the way, your video "How to replace an Andersen Window Balance" on youtube is outstanding.
Thanks and regards,
A customer submitted photo of an Andersen sash balance.
Profile picture of Tom
Tom from SWISCO responded:
Thanks for posting, Dewey. Actually, looking at your picture, it appears that your code read 9#27, not 3#27. I recommend that you double check just to make sure.

I think you should look at our 24-939 Andersen sash balance, which can replace balance boxes with the stamp 9#27.
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 4-7 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at 856-317-6263 or at