Andersen 531 Narroline Sash Balancer

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.

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.

They fit and work perfectly. Were a bit trickier to install, but that was due to the installation of the original balancer and not the new one.

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

A Perfect Replacement

Fixed my problem with the window.

Ordered two of these to replace the balances in one of my Andersen windows and one of them was binding and the cord felt wobbly when it was pulled down and then retracted. Needless to say once I screwed it up into the window jam it wouldnt retract at all..

Appears to be a genuine Andersen product. It was kind of a pain to replace due to the size of my window and the fact that the window had extension jambs, which means you cannot full remove the header piece, but the window works like new now that it is done.

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.

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