Thank you - was losing hope for our broken blind as couldn’t find replacement parts.

Thanks for taking the time and trouble to make this video. Mine is now repaired as per your instructions and it only took an hour and £3 for the cord. I didn't trim my ends after knotting the new length as it didn't show or affect the running of the blind so if it ever happens again I can easily undo it and connect a new length.

Brilliant, easy to do - now works a treat. Velux no longer 'support' my old blind, so would have meant buying complete new blind. All very straight forward, I thought I'd messed it up but just needed same tension on both sides, blind works perfectly - many thanks for posting video, much appreciated.

The upper part, where the cord comes out of the black thingy, isn't actually sealed. You can take it out using a flat end screwdriver or a similar tool. That way you don't have to tie the cords together.

This is fantastic. Thank you so much for making this video. For pre 2008 Velux DKL blinds they don't sell replacement cord - a new blind for my M04 window would cost £70 so it's a decent saving.

Really useful video. A few notes from my repair with a slightly different design; 2mm was too thick for my windows and got caught/snagged. 1mm was fine. I had no narrow tube on my design making it a lot easier The only remaining issue I have is where I tie the cords. At the top I need to be near the top to allow the blind to completely open. I also needed to tie at the bottom as my old cord wouldn’t unclip, and the higher knots create a small gap between the window and the blind.

Thank you so much for making this video. I did not think I could do this repair but I did with your help. Thanks so much.

Very useful video, thank you. A few notes......1) at the ends of your nylon cord, heat them with a cig lighter to stop fraying. 2) To join the new and old cords at the top, loop them together, then slide a piece of heat shrink over the joint and shrink with a heat gun, hair dryer, or lightly with a cig lighter, trim off excess..3) As previously mentioned, the cause of the failure as is shown is the cord sawing its way through the plastic guide sleeve. You can either obtain a new pair of these sleeves (£18!!), or, search for a free 3D printer file and print them, or, just remove them and fill in thoroughly with JB Weld or similar epoxy, then just shape with a Dremel or similar crafting tool. My shade is as good as new as is the guide sleeve.

Excellent. Thanks! 5m of cord did the job on my large window (GPL.S10). I doubled it and pulled it through from the middle, so only had to do that once. There's no need to trim the bottom ends of the cords until the very end of the process. In fact mine are still dangling!

Thank you, that was super helpful! I struggled with the threading through bit, but fortunately had an old guitar string to hand which I could use to pull the new cord through 😅

This is a great guide thanks! I've also worked out - you can open the other side of the cord cassette - so you can make it neater :)

Thanks for this, it inspired me to give it a go and is working well so far.

Super tutorial! Following it made the disassemble of the blinds easy and I managed to fix it too.

Thanks for the video. Very helpful

Thanks a lot! It was really easy!

Thanks. Really helpful

Good video but the real problem is the poor design of the blind. With constant use the chord cuts into the plastic ends of the cross bar making a deep cut and that is what frays the chord. As one of the other commenter's pointed out the plastic ends are not sealed and can be taken out and the cord replaced properly but you will still have to address the issue of the cut. I filled mine with plastic and super glued it in.

Hi AJVW, thanks for the video. Can you provide a link to some nylon cord that will work for this repair? I've bought some but it looks much thicker than the original velux cord. Thanks!

The cord on mine has snapped on one side and looks like it's disappeared inside the tube bit at the top. Do you still think I will be able to somehow thread sone new cord into it? TIA

Thanks for the video! You made it look so easy. I replaced the torn cord and it looks a lot neater, but doesn't really work all that well (the blind only goes 2/3s of the way up, and with a bit of difficulty). What could I have done wrong?

You can see the main problem at 3:33. The small gray plastic is cracked. It is the reason of the cord fraying. If you check a perfect window, you can see the difference. Excuse me for my wrong english.

I’ve a problem with mine. The cord isn’t in the plastic connector on the frame properly. And is jamming at the bottom. I’ve tried to adjust the plaster thing. 3:16. I pulled the blind down and I thought I had fixed it. Then the blind retracted and the string has gone inside the bottom. 😩 How did you get the end off to reveal the cord? I’ve been on ages trying to thread the string back through. 3:38 you don’t show how to get the end off to reveal the cords. 😩

I got the metal runners off, but cannot for life of me, get the ind unit itsself out. Any ideas?

Hello ! Thnaks for this video, just got the same problem home ! Just wondering, you seem to be able to remove the store thing pretty easily from the window, how did you do it? Mine is not removed that easily i think... Thx for the answer !

Such a great video and super helpful. Question where can we order pieces? Velux trying to charge me over 300 euros so want to figure it out and I don’t know the names of some of these parts

Hi want to repair some Venetian blinds has similar chord can you recommend a good source for it please

Your cord is slack and loops out as you move the blind down (I note you didn’t fully close the blind). You also didn’t address the reason the cord has frayed in the florist place, by cutting a groove through the plastic end cap over time fraying as it goes. The end cap needs to be replaced as well.

You don't need to tie a not you can weld the ends together

Watch on 2x speed. Thumbs up

I just got around to trying to do this for myself. My blind doesn't just pop out like here (kzfaq.info/get/bejne/rtqBeamcu8vFfpc.html). It seems to be fixed. However, I can't for the life of me work out where those fixings would be. Any ideas?!

Really useful video, but not 100% clear to totally replacing the core and looks like in the video only part of the cored is replaced, I tried this but the knot stops it completely closing the blind, the video only partly explains replacing the cored and would be more helpful if fully explained how to replace the core, as paniced after cutting the core and now gets stuck on the knot and our blind only partly closes 🙄

Thanks very helpful. I've now repaired my blinds saving quite a bit of money. #righttorepair. They're not 100% but I'm quite satisfied. One little tip that I found is that I got better results when I fused the old and new cord together rather than tying together, I only then had to adjust the tension at the clip end. Fusing cord: kzfaq.info/get/bejne/ncdoa7CWrJjZh40.html

go fudge, to see how long the repair lasts

So much work 😩

god please get a better camera