The last couple of weeks it's cooling down and I started to notice that my left hand is freezing of while driving...

I got the climate control on 22 degrees (celcius).
I first thought it was this as it seems cold air is comming from the vent near the windows.
But when I user the buttons to direct the air to up, side and down they all blow warm air.
Still my hands freezes off.
I first thought of the ruber sealing but that's tight, I felt with my finger and no gap, also no breeze.

Is there some hole somewere under the bonnet that could let cold air in?
I can't remember having this issue last winter.

I would like to have it fixed before it go's freezing

Also one other thing.
When I have climate control on and take a long left turn the tempature of the air drops and I get cold air in.
I know this usualy mean you have air in the radiator and need to take that out.
But I have not changed the coolant this year, level is still the same...