The Heater fan on my stilo works on all settings but do not get hardly any air through the vents any ideas on why this is happening?

Tried replacing your pollen filter? There's a how-to here:

https://www.fiatforum.com/stilo-guides/55320-pollen-filter-how-remove.html

Thanks for the tip changed the filter today so much crap in there i don't think it had ever been changed.
Problem solved, Good guide too thanks.