"Roller Shade:
Our trailer came with day/night roller shades. I love the function and look of these shades, but they have an achilles heel. Internally there's a small lame plastic part that engages the roller with the spring. This breaks and as a result the spring loses its tension and the blinds unroll completely and won't roll up. If you see this part I bet you will agree with me when I say that this terrible feeble part is ridiculous. I currently have three blinds that are broken like this. This tiny part should have been steel."
I believe your shades may be by Irvine Shades.
They have some videos on their site that may be helpful in how to adjust and/or fix them...
https://www.irvineshadeanddoor.com
Call their customer service and they will likely send you new blind guts at no charge. They have helped me several times.
Office Address:
1000 Verdant Drive
Elkhart, IN 46516-9042
(574) 522-1446
Cheryl_isd@outlook.com
orders.irvineshade@outlook.com
cs.irvineshade@outlook.com