SWISCO - The Replacement Hardware Authority

Andersen sag

A quick learner from California says:
I recently purchased a pair of Andersen sash balances (24-637), but the sash won't stay up.
What balances should I use for an Andersen sash that weighs 20 Lbs?
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Tom from SWISCO responded:
Could you tell me what numbers were printed on your original balance box? That will allow us to determine exactly what you need.
A quick learner from Redwood City, CA says:
Good afternoon Tom,
Thank you for your prompt response. The part number given to me by my project manager is 11600-17. Steve from Customer Care informed me that there should be another series of numbers with a "#" sign. I've reached out to my project manager to see if he could gather that information for me.

Kind regards,
Ryan
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Tom from SWISCO responded:
Thanks, Ryan. Yes, there should be more stamps. Knowing each number printed on it will help us. "#" is the most common symbol, and usually indicative of the right number, but there are other configurations. It's frustrating, but sometimes even the size and font used to print the stamp is just as important as the number itself. Seeing pictures of each stamp would be the fastest and most reliable method of recommending the best match, if that's a possibility.
A quick learner from Redwood City, CA says:
Hi Tom,
Attached are two images of the original sash balance.
Hope this helps.

Kind regards,
Ryan
User submitted photos of a window balance.
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Tom from SWISCO responded:
Perfect. The key number here is "731." I recommend our 24-737 balance, which is meant to replace balance stamped with that number.
A quick learner from Redwood City, CA says:
Thank you Tom!

Kind regards,
Ryan
A quick learner from Redwood City, CA says:
Hi Tom,

Ordered the sash balances but they failed. The window keeps sagging down. I need something that will be able to support 20-22 lbs of weight.

Please advise.
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Paul from SWISCO responded:
That's odd. Your balance definitely has "731" stamped on it, which is for a much lighter sash. That's a pretty big jump. Did you ever find that your old balances did not work properly? Just to be safe, can you give me the height of the visible glass for both the top and bottom sash?
A quick learner from Redwood City, CA says:
Happy New Year Paul!

The height of the visible glass is 24" and the width is 24-3/8".

Thank you and I look forward to your product recommendation.

Kind regards,
Ryan
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Paul from SWISCO responded:
Thank you again for your patience. The size of your glass indicates a 24-737 would be the best match. This is a peculiar case. I do not know why your balances were failing, all clues point to the 24-737 as being the one you need. It's possible someone replaced the glass with something heavier at one point in the past. If you want to try it out, you could try the next balance up, but I cannot guarantee that this will work. I am sorry we cannot give a more definitive solution.
A quick learner from Redwood City, CA says:
Hi Paul,

What is the next balance up? We might just take the chance and try it.

Thank you!

Kind regards,
Ryan
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Paul from SWISCO responded:
To be honest, at this point I think it's best to go a few levels up. See our 24-1033, which can support 20 pounds. I can't guarantee it will work, but you have such a strange setup that I don't think anything will be an exact match. This may be your best bet.
A quick learner from Redwood City, CA says:
Good afternoon Paul,

Thank you for your recommendation. Ordering them today through your website.


Kind regards,

Ryan
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Paul from SWISCO responded:
Thanks for the order, Ryan. Let us know how it works out.
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