andersen sash balances

A quick learner from Raymond, Maine says:
January 9, 2023
We bought Andersen Sash Balances 24-531. The technician went to install them for the customer and they are not strong enough to hold up the sash. Is there a balance with a stronger lift ability along the lines of this product?
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Casey from SWISCO responded:
January 10, 2023

Hello,

Based on the 12#27 stamp on your original assembly, you would need the 24-1231 Andersen sash balance for your repair. Thanks for posting! 
Andersen Sash Balance, 1226, 1227, 1231
Andersen Sash Balance, 1226, 1227, 1231
24-1231
$54.20
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