If your blinds do move down when required but struggle to roll back up, this would suggest there is too much tension within the operating mechanism. The blinds retract back up after applying manual tension to the cord, however, if the blind is already far too tense then this operation won't have much effect, if any.
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.
The issue you are having could be down to a lack of appropriate tension. To fix this, remove one end of your cordless roller blind from its bracket. Spin the blind one way while ensuring the spring stays within the bracket. You will increase the tension and get it back to a suitable state.
When the shade won't go up or down properly, the roller mechanism is probably at fault. Shades are operated by a strong coil spring inside one end of the roller. The pin that holds the shade up at this end of the roller is flat; this flat pin tightens or loosens the spring when you roll the shade up or down.
Chances are you don`t need a new roller; you just have to rewind the present roller to increase tension. Here`s how: Pull the shade all the way down, then with the shade still unrolled lift it out of its brackets and roll it up by hand. Replace the rolled-up shade in its brackets, then try the shade again.
Want to enjoy restful sleep in the middle of the day? Turn your blinds up. This direction is better for improved privacy too, as minimized gaps between the slats don't allow curious passersby to view the inside of the house. To let in a small amount of natural light, it's best to turn your blinds down and close them.
What are tensioned blinds? TESSTM tensioned blinds utilise a unique torsion spring mechanism combined with ultra-thin tension cable to provide perfectly flat, smooth-running fabric shading for a vast range of façade and glazing applications.
Not rolling up evenly is the most common problem with any type of roller shade. Telescoping is when the shade gathers to one side or the other as it is rolled up. This is typically a leveling problem, however; you do not have to remove the shade to fix it.
An over rolled blind on the face will leave a gap between the blind and the architrave, allowing a large amount of light and heat loss through the sides. An under rolled blind on the face however will roll as close to flush against the architrave/wall, minimising light and increasing privacy.
Try lowering the shade completely, then raising it to allow it to self-correct. If one of the lifting strings is frayed or broken you will need to replace all the strings in that operation. Also, the lifting string could be rubbing through the cord guide or rubbing a groove in the cord lock.