In typical Audi fashion, it didn't take long for my first problem to come up. I noticed on our weekly trip to Costco that the A/C wasn't kicking on. I'm so glad I got the OBDEleven (affiliate link) scanner as I was able to find out the problem while waiting in the Costco gas line. If you don't have a OBDEleven, it is worth it. You get everything the VCDS (VagCom) has, but in a easy format.
The faults I got were 00457 & 00256:
The part I needed was an A/C Pressure Switch (Part Number: 4H0959126B)
The install was super easy. Just remove the black plastic tray that sits over the top of the radiator and A/C condenser. This is the same tray/cover that is in between both headlights in the engine bay. Next, look down just behind the front grill on the driver side and you should see this:
You do need a 24mm wrench or super deep socket. Simply remove it counter clock wise. If you are using a socket you will need to unplug the electrical connector. Once it is nearly off you should here a small "phsss" for a second. That is just a small amount of refrigerant coming out, but it is ok. Now if you hear a ton coming out more than a few seconds, well, you just lost your refrigerant and you got another valve that needs to be replaced (sorry).
At this point, just go in reverse order and install the new switch. Done. Enjoy have working A/C!
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