Andersen 837 Narroline Sash Balancer

The original balancer failed after 25 years. Searched and found out what I needed and how to replace it. Ordered and had it in 2 days. Followed the instructions to install it and its like brand new.

Exact replacement for my windows. Installed easily and works well.

It is quite an ordeal to replace one. Im handy and I may hire someone if I need to replace another.

Well packaged, clean, and exact replacement part for Andersen double hung window

This and YouTube made the replacement job pretty easy.

Fit perfectly, solved my window problem.

Perfect fit for my old Narroline Window from the 1990s. Instructions were clear. Not too hard to replace if you can get the vertical plastic window track out. Check your windows and the interior trim around your window to make sure the plastic vertical track and top plastic horizontal cover will come out OK. It can be a little tricky to get these plastic pieces out. Check Andersen website for instructions before you attempt the installation. Works very well once installed. I agree with the general recommendation to replace both sides at the same time.

Worked great.

It fit perfectly in place of thirty year old original Andersen balancer. Appears well made, and functions smoother than original balancer when it was new.

I have now replaced the sash balancers on 9 windows that were installed in the late 70s. Bought the first set from a local window supplier. They had to be ordered and cost more than Amazon. Bought the remainder on Amazon and all went well. However, one set came partially bent on the mounting tab but I was able to bend it back into shape. I was apprehensive about doing this job, but it really is quite easy. Hardest part was notching out the wood frame with a chisel since these replacements a just a bit longer. I wish I had more windows to change out!