I have a 1995 Mercedes C36 that sometimes would blow cold air when the A/C is turned on, but most of the time iit is just warm air. I am thinking about changing the evaporator sensor first and hoping that it would fix the problem. Can anyone tell me where this sensor is located?? Thank You

I went into the Diagnostics display for the A/C and i noticed that on code number 22 I am getting 00. When it does show some numbers the A/C would kick in and get cold, but most of the time when it is 00 it is blowing hot air. What could it be and how can i fix this problem. Thank You