Broken coils windows don't stay open

A home owner from Nj says:
November 15, 2020
We have 6 windows out of 14 which don't stay open coils are broken . What is the problem ??? please let me know how to repair as we want to sell the house . Some have a number 8 on the plastic casing
Thumbnail of the uploaded file named 361161B7-DACD-4373-A8FB-106905393958.jpeg
Thumbnail of the uploaded file named 431352F7-1A3C-4274-A337-83EF90F4E1C4.jpeg
Thumbnail of the uploaded file named DC3CA6CB-0C0B-4B53-A10C-E61E0D2C07FE.jpeg
Profile picture of Bob
Bob from SWISCO responded:
November 18, 2020

Thanks for posting. Sounds like you need to replace the coil balances. This shoe and housing is our 15-087 and 15-086; this assembly uses our Series 180 Coil Balances. If you need help picking the right stamp option, give us the exact weight of the window sash, and we'll work out what you need. 
Tilt Latch Pair
Tilt Latch Pair
26-408
$3.72
Coil Housing Pivot
Coil Housing Pivot
15-087
$5.97
Tandem Coil Housing
Tandem Coil Housing
15-086
$1.68
How to Replace a Triple Coil Balance System
How to Replace a Triple Coil Balance System
VIDEO
WATCH >
Removing and installing flush mount tilt latches
Removing and installing flush mount tilt latches
VIDEO
WATCH >
Anatomy of a tilt window
Anatomy of a tilt window
VIDEO
WATCH >
How to remove window pivot shoes
How to remove window pivot shoes
VIDEO
WATCH >
Styles of Tilt Window Latches
Styles of Tilt Window Latches
GUIDE
READ >
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 3-4 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 (888) 991-1929 or at help@swisco.com.