Looking for the water temperature sensor for the ac system on a 2005 Santa Fe . Have tested the ac thermistor , triple switch , relay, Freon levels . Everything tests good, ac stops working after 15 mins of run time. Trying to locate the water temp senor to test it. Thanks

 

I'm a little confused on what a water temp sensor is or has to do with the AC? I can see thermistor inside, triple pressure switch, Air Quality Sensor,Ambient temp sensor(front of Rad),In car sensor, and a thermal fuse in the clutch coil

 

If it works for a little while then stops working then possible low on refrigerant??
Or could be expansion valve not working??
Just guessing