My scanner (foxwell nt-510) will show three status of the heat valves the temp of each heater core and the balance of the hot/cold vanes.

To start with, set your HVAC to full auto and use temp to set how cold. When using AC the standard starting point is 74 not "max ac".

Get a stick thermometer put in the different vents and measure.

Get a scanner that can read important details like the evaporator temp.

Is your low pressure line under the hood greeting ice cold? It should be.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)