Andersen 531 Narroline Sash Balancer

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.

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.

Direct replacement window operates like new. Make sure you use measurement chart for correct part number

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.

I liked that it went in without having to modify the window

Works well to replace the counterweights in my Anderson windows.

the hardest part is to remove the plastic track. i put some dawn detergent on it to make it slippery to take off and then to wiggle it back into place. the balance was an exact match and fit into the available slot without any additional work. the window functions better than new.

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.

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

Mechanism failed at 18 year point. Needed to match exact window with balancer. Lots of good encouragement on the YouTube and from Andersons website for DIY. Hardest part was removing side vinyl/plastic panels without cracking or scraping casement. Patience and persistence paid off.