I m seeing a strange problem with my Fabia

The windscreen wipers dont work when they you have intermittent wipers enabled

By this I mean that when you select the first lever up - The wipers dont work but two notches up - when the wipers work all the time it does work.

Does anyone know whats causing this? Its driving me nuts.

Also on the windscreen lever there is a button which moves from left to right - What does this button do?

Check your bonnet is shut properly - good chance it isnt.

The button is to adjust the interval period.

I had the same thing a few times, it's worth a shot

Tried that a few times - That didnt work

Any other possible causes?