You did purchase a quality window. Not unlike every other window in the marketplace, Marvin does not make every component in the window and if something like the balance (usually sourced from a 3rd party) had a long term defect, it would be unknown to Marvin until they already had the units in circulation for years. Not altogether different from a car company that has a recall of sorts sever years after the fact.

Nice thing about hardware is that is quite easily serviced.

I am sure that if you contact Marvin, they would be happy to discuss
some resolution with you. They have since extended the warranty on the
Integrity product line up on many items and give the modularity and
serviceability of items like the balance systems, it should be an easy
fix for you.

Was your dealer the one that sourced the windows for you? Seems like it would be an easy enough conversation with the dealer to get them to help with Marvin in providing the balances or at least sharing in the expense of the balances if these were truly units that were known to be, years later, defective.

In an absolute worst case scenario, balance mechanisms aren't usually that expensive and can be sourced from folks like Blaine Hardware in Maryland if Marvin can't/won't help. I don't see that being a necessity, but if the only thing wrong with the windows after 10 years is some balances, I can promise you that there are countless stories of folks that are far worse off inside that same time period.

Either way, I think Marvin will probably want to help out if I know anything about the company and their past handling of issues.

Happy 4th of July!!!

Any follow up here?

We’ve replaced our Marvin double hung balances 3x in 17 years. I find that excessive for “window maintenance” . I called the Marvin HQ and was directed to the IL. rep. She said sorry, if you use them too much or too little balances will go bad. Marvin was a high-end manufacturer choice and not cheap. I can tell you this- their customer service was non-existent and non-empathetic. There are other quality window companies out there. I have 3 homes and won’t put Marvin in the next home that needs windows..

That’s really frustrating, especially when some of the windows were barely used. Having to chase the dealer for months after already paying for a quality product would definitely leave a bad impression. Hopefully Marvin can offer a proper solution even though the warranty has expired.