B7 ac compressor not engaging and radiator fans not working

[bpat1017]

Took my car to the dealer to get ac checked. They said single wire signal lost. That's all they could tell me.
Manually ran voltage to a/c compressor and compressor engaged
Econ light is NOT on
System vacuumed and charged properly.
CORRECTION. Radiator fans turn on properly.
Ambient temp is always 5 to 10 degrees higher then actual temperature

What is preventing my A/C compressor from engaging? Ambient temp sensor? Climate Control Unit? or Something else?

[SoCal Driver]

The drivers side fans runs when the coolant temp reaches temperature (don't recall the exaxt temp), the passanger fan runs when the A/C is on. If your radiator fans aren't spinning at all then it can be the fans or the fan control module (FCM), or both. you can test the fans by applying 12v direct to them, it if the fan spins then it's the FCM. If it doesn't spin then it's the fan. A faulty FCM can burn out the fans and visa versa. My B6 had a faulty FCM and it caused both my fans to fail.

[bpat1017]

Correction!! The Fans work fine. bad fuse. Something isn't opening to send voltage to the A/C Compressor

The drivers side fans runs when the coolant temp reaches temperature (don't recall the exaxt temp), the passanger fan runs when the A/C is on. If your radiator fans aren't spinning at all then it can be the fans or the fan control module (FCM), or both. you can test the fans by applying 12v direct to them, it if the fan spins then it's the FCM. If it doesn't spin then it's the fan. A faulty FCM can burn out the fans and visa versa. My B6 had a faulty FCM and it caused both my fans to fail.

[marlboro]

Your problem seems similar to mine. How did you run voltage to the compressor? Just applied 12V at the connector? Someone suggested my problem could be the pressure switch.

[Humble tree]

Any luck? Having same issue. New FCM and fans turn on when tested with 12 volts

[Biged243]

Have yall checked the relay? Also what is the temp outside? Are you using auto, or forcing the ac on?

[bpat1017]

So I had audi look at the car. They serviced the system and changed out the control module. They ended up telling me the germans are complete retards. I have to come back next Saturday for them to recode the entire car. They did it for free but ran out of time due to a 2016 A7 needed to be worked on for oil problems. Can't wait to get this problem fixed. Once this problem is fixed I will be selling my audi dirt cheap. Rs4 wide body and complete rebuilt motor to handle 500hp. Need to sell asap.