Vertical blinds that won't rotate can be a real pain. The first thing you should do is check to see if the cords are tangled. If they are, untangle them and try to rotate the blinds again. If they still won't rotate, you may need to take them apart and fix the gears.
If blinds won't rotate, and there doesn't seem to be overlapping or backwards blinds, check the slots where the blinds are connected to the carrier stem. In some cases, there is something obvious jammed in these holes, like a piece of dirt or even a small piece of the blind itself that broke off.
This often happens with dust and debris buildup, so look up and check to make sure the blinds can move properly along the runner. You'll also want to check the runner itself. A frayed section leads to the pulley getting caught, which prevents it from sliding open and closed.
Stuck Vertical Blinds
For Vertical Blinds, first make sure all of your slats are properly aligned. Ensure that the ends are uniformly arranged and that the slats aren't awkwardly tucked behind each other. If they are misaligned, rotate them until they are in place. This should quickly solve your problem.
Vertical blinds can also be called patio door blinds. They are slightly difficult to repair. Common repairs include replacing broken carrier clips, restringing the blinds and replacing broken valance clips.
If you pull on the chain and your blinds do not move, then look at the track to see if there is a build up of debris or some other obstruction. Insects can sometimes get trapped in your vertical blind tracks which will stop the blinds from opening or closing.
Blinds Won't Lower or Rise
The most common reason for slats getting stuck and unable to be lowered or raised is that their cord is trapped in its lock mechanism. To release it, raise the cord until it's level with the headrail at the top of your blinds, and then gently tug on it.
Both types are usually fastened to the vertical blind headrail using valance clips which are commonly made of plastic.
As in order for the blind to open and close side to side, the blind vanes must be hung vertically. They are in fact fastened into a headrail and move via a pulley system, which can be operated by cord or motor.