Repair Your Cellular Blinds...
Provided courtesy BlindSaverAtx.com
Restringing your own cellular shades is easy.
All you need are a few common household tools, some patience, and these fully illustrated step-by-step instructions. Please note these are general instructions on how to do this repair as all brands are a little different. Take your time and, if you're nervous you might not get it back together, take a few of your own photos as you disassemble your blind so you get it reassembled properly!
1) Remove both end caps from bottom rail and one end cap from top rail.
2) Remove cord lock from top rail.
3) Slide bottom rail and top rail exposing cords inside shade.
4) To calculate the proper amount of string use the window height x 2 + shade width + 12 inches.
5) Remove old string. Place washers aside for use in next step. Then insert new string with threading needle and pull cords through.
6) Tie off new cords at the bottom using washer from old cord to prevent cord from pulling through.
7) Slide bottom and top rail back on shade.
8) Thread string into cord lock and reinsert cord lock back into top rail.
9) Reinstall both end caps on bottom rail and the one end cap on the top rail.
10) Measure from the cord lock down and add 2 inches, install the cord condenser ball. A condenser ball gathers the multiple cords from a blind and keeps the cord length uniform so the blind pulls up evenly with a single cord to pull. Graphics below show one type of condenser ball installed and a second opened up. There are a variety of styles and you can find many online if you'd like to update yours!
You will have 2 to 4 cords coming out of the shade (depending on the size of the shade) that will tie off inside on end of the cord condenser ball. You will also need a 1.8 mm size cord that is used as the pull string. This will be a single string that will be used to pull the shade up and down. This string is usually half the length of the string. You're done!