Hello, i have a 2001 Audi A4 and its not putting out heat correct. My temp reads proper temp and the heat gets hot, but not as hot as it should as quick as it should. Trying to figure out what to do. Ive been told to replace the thermast, fluid dlush or could it maybe be the heating cord/heater its self? Its only 8.5 C out, so kinda cold but not as cold as its going to get!

 

I thought it might be that but last time it needed regassing both sides were blowing out warm air.

This time the left side is blowing out roasting air and the right is blowing out freezing air. Almost like it is trying to compensate for each others extreme temperature