AC dual mode not equal

[Andrev]

On my PHEV 2018 with 92000 km, I noticed that I cannot get cold air on the driver side, but on passenger side it works. I tried different settings on both sides, nothing works. It is probably a thermostat failure on the driver side. My question is: will it be expensive to repair at Mitsubishi dealership?

 

[DaveL59]

Not sure if there's any OBD data available to show how the AC system is functioning, but it could equally be a stuck flap/motor. Without having a schematic of the system it's a guess tho, having had similar on cars with single rather than dual-control.

Dealers wouldn't be cheap and if you can either get diagnostic info or identify the component at issue, it might be fixable DIY depending on how you feel about being doubled up working under the dash from the footwell. Very fiddly but possible.