Window Balances need replaced

A home owner from Norfolk says:
December 5, 2012
I'm selling the house and this is something that needs to be fixed before closing. I have attached pictures in the hopes that you'll be able to help me fix it.
User submitted photos of a window balance.
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Paul from SWISCO responded:
December 6, 2012
Thanks for posting! Looks like you have a 19-002 top attachment and a 15-001 shoe. In that case, I recommend that you look at our S390-15 channel balance with a 1420 option. Does that look about right? Let me know what you think.
A home owner from Norfolk says:
December 10, 2012
Paul, the pictures that I had posted above were from my dining room window. I needed to replace the balances in my bedroom window. 16" with a stamp of 15 D on them. I ordered S390-16 16" Series 390 Channel Balance, option 1510. I thought these were going to work, but the window does not stay up on it's own unless I push it all the way up. I don't know what to do. This is one of the items I need to have fixed before closing on the 27th of this month. Please help...
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Paul from SWISCO responded:
December 11, 2012
I think I see your problem. The stamp of 15 D does not correspond to 1510. 1510 would be way too weak for your windows, and considering that you can't open your sash, that seems to be the case. For future reference, before you buy a balance, make sure to compare the weight of your sash to the weight range shown for whatever option you decide to choose. That may have saved you some time and trouble.

Ordinarily, a stamp of 15 D would correspond to the option of 1540. I recommend that you remove your sash from the window and weigh it, then compare that weight to the range shown for the 1540 on the S390-16's product page. Let me know!
A home owner from Norfolk says:
December 11, 2012
Thanks! I weighed the window, like I should have in the first place, and they weigh 16 lbs. Those fall under the S390-16 1550 13 to 17 lb range. I am in the process of requesting a return of the items now. I wish I would have noticed the weight range and proceeded accordingly.
Channel Balance Top Guide
Channel Balance Top Guide
19-002
$0.74
Channel Balance Shoe, 1-1/8" Depth
Channel Balance Shoe, 1-1/8" Depth
15-001
$0.74
15" Series 390 Channel Balance
15" Series 390 Channel Balance
S390-15
$9.34
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