What to Do If a Roller Blind Won't Roll Up or Down

A roller blind that won’t move is almost always a spring tension problem.

The spring inside the barrel either has too little tension to pull the blind up, or too much and it won’t drop down.

Either way, it’s a quick fix you can sort out without calling anyone.

What You’ll Need

Tools

• Step stool or ladder
• Flat-head screwdriver
• Needle-nose pliers (optional, for stubborn barrel pins)

Materials / Replacement Parts

• Dry silicone lubricant spray (not WD-40)
• Replacement spring mechanism (if the spring has snapped)
• Replacement brackets (if the original fittings are cracked or bent)

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How to Fix It: Step-by-Step

Step 1: Work Out What’s Actually Wrong

Before you touch the spring, rule out the obvious stuff. A lot of “broken” roller blinds are just stuck in their brackets or sitting crooked on the fittings.

1. Pull the blind down about 30cm and let it go. If it flies up fast and won’t stop, the spring is overtensioned. If it just flops and goes nowhere, it’s undertensioned or the spring has gone.
2. Look at both ends of the roller. If one end has popped out of its bracket, reseating it will fix the problem entirely.
3. Check the fabric. A blind that’s rolled unevenly can jam against the bracket and mimic a spring fault. Run your hand along the barrel and feel for a lopsided roll.

Step 2: Rebalance the Spring Tension

This is the part most people don’t know they can do themselves. The spring inside the roller is wound up during fitting, and over time it can lose or gain tension. Adjusting it takes about two minutes.

1. Lift the blind off both brackets and lay it somewhere flat.
2. Find the pin end of the roller (the end without the chain or cord). This is where the spring is housed.
3. If the blind won’t go up (undertensioned): roll the fabric up by hand, then replace the blind in the brackets. This pre-winds the spring. Test, and repeat if needed until the blind pulls up on its own.
4. If the blind won’t go down (overtensioned): pull it down to about halfway, then lift it off the brackets and unroll a few inches of fabric by hand. This releases some spring tension. Refit and test.
5. Go gradually. One or two rolls at a time is enough. Too much and you’ll create the opposite problem.

Step 3: Clean and Check the Mechanism

Dust and grit get into the barrel ends and the brackets, and over time they put extra drag on the movement. This won’t cause a spring fault, but it’ll make a borderline spring worse.

1. Wipe down both brackets and the pin ends of the roller with a dry cloth.
2. Apply a small amount of dry silicone spray to the pin and socket where the roller sits in the bracket. Don’t use WD-40 as it attracts more dirt and can degrade plastic components over time.
3. Check that both brackets are still firmly fixed to the wall or ceiling. A loose bracket can let the roller sit at a slight angle, which puts uneven pressure on the spring and causes it to bind.

Step 4: Test and Decide If You Need a Replacement Part

Once you’ve adjusted the tension and cleaned the fittings, it’s time to test properly.

1. Refit the blind and roll it up and down several times. It should move with consistent resistance throughout the full range.
2. If the blind still won’t roll up at all, try the tension adjustment one more time with an extra roll of pre-winding.
3. If the spring feels completely dead with no resistance in either direction, the spring mechanism has snapped. On most rollers, the spring barrel can be replaced without buying a whole new blind. Check the manufacturer’s name on the bracket or headrail and order the correct spring unit.
4. If the roller fabric is warped, torn at the tube, or the barrel itself is visibly bent, a full replacement is the more practical call.