E320 AC help

[T77911S]

2000 e320

I am out of town
my AC stopped blowing cold
comp clutch is engaging
I found the instructions for diagnostics but the problem is the left side of my display it is not readable,
I did have error codes but I cleared them and they do NOT come back.
I could see error codes but could not make them out
I was also able to operate the flappers and blower in the diagnostics but not sure all passed. air did move from dash vents to floor vents.
air temp out of both side s is the same temp

I am thinking it has something to do with the door that switches from heater core to evap but not sure what else I can do.

[Ben D]

Duo valve stuck on or low on R134a (i know the compressor is on...) 210 doesn't use a blend door for a/c-heat control.

[Zulfiqar]

try tapping the duo valves with a soft hammer to unstick them. If that doesnt help their pintles have broken off inside.

Lots of lookup material online to repair them, BMWs also use similar design and part (just throwing it in for broader search).

To verify such, press the EC button and aim the target temperature to be ambient temperature outside or lower, you should not be getting heated air from the vents at that time. If you get heated air your duo valve is stuck/broken.