Andersen 531 Narroline Sash Balancer

I had an old Anderson 523 Sash Balancer with a broken string. This said it was compatible for the model 523 so I gave it a try. The old one had screw holes through the center of the unit and these have holes at the end through a tab that my older ones did not have. These fit perfectly in the old space. The tabs do extend out slightly but they screwed in just fine and I did not need to notch any of the frame. There is an awesome how to video I found on U Tube that shows how to replace these. Just search how to replace an Anderson window balance. The window works smoothly now and this is much easier and cheaper than replacing a window.

Installation was a breeze. You take the two window sashes out and the top cover for the balancers. The current balancer was just stapled into place so I had to pry it out. The new one went in with the screws provided. Now I dont have to use an old plastic bottle to hold the window open anymore.

Almost as easy to install as the videos show. Taller windows are easier to do as you have more room to bend the plastic jamb covers. best to do in warm weather when plastic is more pliable. take your time, dont drop the sash. An extra person to hold the sash during the procedure might help. works great.

perfect fit shipped fast

These fit was perfect with a little retro work that was spelled out in the directions

Fixed my problem with the window.

The product itself is easy to install. It’s stripping the window and replacing afterwards that’s a treat. Plenty iy YouTube videos to show you what to do but it’s a tough job. I have smaller windows which may make it worse. You have to apply a lot of force to bend some plastic parts which don’t want to bend and may buckle. The broken balancers, though 25 years old, had seen very little use. We just about never opened those windows. Based on my experience the windows and components are very poor quality.

ordered two and only received one. contacted sender and they sent me the missing item. other then that, all is good

Easy installation once you get the sashes out of the window casing. Good directions on YouTube and on the direction sheet that came with the product.slightly different construction than the ones that were in the 40-year-old window. Slight modifications made them fit just right.

A Perfect Replacement