hi I have a fg falcon 2013 on a hot day with the fan on full the force of air could be a lot stronger any tips thanks

You may have debris in the pollen filter? it is located behind the Glove Box lid.
Not a really hard job getting to it, there is a tray that is what people car a Pollen filter but it isn't but, it can get blocked up with leaves and such.

Take a look at this video, the BA has the same system.
https://www.youtube.com/watch?v=z7JBhW-RSQ8

I replaced it thanks anyway