have you tried refilling the freon? i understand that normal pressure range for inlet & outlet is around 1.5-2.2 bar and 12-22 bar. since driver side is cool and passenger side is warmer, the inlet pressure should be within normal range and outlet pressure should be on the low end. this suggests low freon and a possible leak somewhere. compressor should be fine since driver side is cooling. depending on how fast the same symptom recur after a refill, it just tells how bad the leak is. well i know of folks who would rather spend about $20-40 to refill freon every 2-3 months rather than change a leaking evaporator.