After recovery, no measurable refrigerant lost since last year.

Refrigerant recovery unit, capable of taking vacuum down to nearly 800 µm 

[@d46512]

So after the recovery, the vacuum decayed. Then you continued the recovery and got the rest of refrigerant out to measure. 👍Not in your case, but if there were any water in the system, it would be important to pull vacuum for a long period of time like you did when you changed the condenser.

[@knk3220]

Could it be the cabin temperature sensor cloaked with dust so the temperature control becomes inaccurate?