Wondering if anyone here had any experience and could offer some advice and possible solution to 2009 A5 A/C and heater problem.

After driving for ~15 minutes with A/C on, i noticed light steam (or smoke) coming out from under the hood so i immediately pulled over, opened the hood and saw liquid (coolant, oil or freon?) sprayed all over the top front of the radiator and bumper and compressed air leak sound coming from what looked like a pressure senor. The liquid and sound was coming out of parts #5,4,3 as shown on diagram




Since then, A/C and heat stopped working, the fan is blowing fine but the air always feels the same temp no matter how cool or warm i set it. No error/fault codes are showing up.

Could this be just a matter of replacing pressure sensor (parts #5,4,3) and do freeon recharge? Or could this be a more serious problem?

All help is greatly appreciated!

 

Yep, it sounds like the pressure switch has come apart inside. It won't hurt to install a new one and get it charged up. You're going to need a new one any way.