NuAir Windows Won't Close All the Way

A home owner from Deland, FL says:
I have two windows that won't close for the same reason. These are both NuAir windows. They are both next to each other. I am told that the 'pieces' on the side are broken and require replacement. I am not certain what part(s) I need to have a contractor complete the installation. Thanks!
Thumbnail of the uploaded file named Missing Plastic Piece on Side.jpg
Thumbnail of the uploaded file named Window Brand.jpg
Thumbnail of the uploaded file named Window Closure.jpg
Profile picture of Bob
Bob from SWISCO responded:

It looks like your window's Top Sash Guides broke. The Top Sash Guides are those nylon pieces in the top corners of the window sash. They hold the channel balances in place--the channel balances are spring-loaded metal channels that regulate the opening and closing of the window. Due to age and sun exposure, the Top Sash Guides can break; when they do, the channel balances shoot past the sash and into the top corners of the window jamb.

Watch the video below that shows how to remove and replace Top Sash Guides. NuAir windows have been known to use either our 18-009 or 18-178 pair, but the only way to possibly know is to compare an undamaged guide to confirm. 

18-009 : 5/8
5/8" Top Sash Guide
18-009
$1.00
VIEW >
18-178 : Channel Balance Guide Pair
Channel Balance Guide Pair
18-178
$2.20
VIEW >
How to Repair a Jammed Window
How to Repair a Jammed Window
VIDEO
WATCH >
How to Replace a Top Sash Guide [1080p]
How to Replace a Top Sash Guide [1080p]
VIDEO
WATCH >
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 help@swisco.com.