Cord Loop Controls
Controls of this type are very reliable. A cord may need to be replaced because it has gotten dirty from handling. Cords can also fray and break due to normal wear and tear. Repairs are easy.
Measure the Old Cord Loop
The first thing you will need to do is determine the size of your old cord loop. You want the new one to be the same size. That way you can avoid having to move the pulley attachment and you won’t make any new screw holes in your wall or window frame. Measure the length of the loop, not the length of the string. Loops are normally measured in whole feet only – that is, they are available as 3 foot, 4 foot, 6 foot, etc.