So my ac is blowing hot air at the coldest settings. Econ button is also stuck. So i thought to myself that it may need to be regas. So i took it to the dealers, they filled my ac with r134a gas, but still hot air and button still stuck. They then plugged it in to diagnostic and had a g65 pressure sensor and air quality sensor fault. I then bought the two sensors, replaced them and removed the fault code. But still, hot air. I then tested my ac compressor by jumping it to the battery.
Whilst the compressor was hot wired to the battery, i turned on the engine and got cold air. So its not a compressor fault. Also checked for blown fuse. But everything seems to be ok... What may cause this problem? The HVAC unit? Any tips? Thanks

There might be a relay for the A/C clutch.