[jsb5717]

That's moost likely the solution. Remember, the awning doesn't stop on it's own once it's fully extended. If you keep pushing the button it will completely extend then keep rolling which will rewind it in the reverse direction. Following the advise above will likely set it right.

Then pay attention when you use your awning so you let go of the button once it's fully extended.

Edit...just saw the latest post. If it isn't electric then someone rewound the springs backwards. They can be tricky but will need to be relaxed and wound correctly. Be very careful or have it done for you.