Audi A4 AC Troubleshooting Part 1

[@JayTech-p9g]

Ur sons car is a clutchless compressor and the one on ur daughters car looks like it has a clutch but the sensor in the back of compressors are always usually a pressure switch

[@Mitch-m7z]

These compressors are clutchless

[@theenglishtrucker1849]

A/C High Pressure Switch,

[@frikici]

You need to check AC Compressor Control Solenoid Valve and make sure it works. Compressor can still be good but Solenoid valve is bad.Also compressor on audi are clutchless. Also common problem on audi is pressure switch.

[@ChumblesProductions]

hey brother, how do you check the AC Compressor Control Solenoid Valve? my ac unit is stuck on eco mode for the air and I'm trying to figure out the issue. The garage I went to said I need a new compressor but that doesn't sound right... I was thinking it might be the G switch