Hot air from the side vents only

[Mr K]

mines doing exactly this, but my compressor is also whining slightly at low revs.
I had it regased in december and that fixed it until one day in janury when it seems to have ditched a load of its gas again.

It blows kind of cool somtimes, but most of the time the side vents are warm. Im confused as to why I can get cool air from the middle one.

I suspect you probably, like me, have low gas. I guess theres a leak somwhere, but god knows how you work out where!