Bob from SWISCO responded:
December 2, 2023
Thanks for posting. The 28310 code has been associated a handful of times with our 24-431 Andersen Sash Balances. However the only reliable way to know if these balances will work for your window is to remove the old ones and send us pictures of the stamps printed on the balance box. Some group of numbers will confirm whether or not the 24-431 is what you need. You can read more about Andersen balances here. |