Pay someone you trust who has highside/lowside gauges to trouble shoot.
Or you you can pick up an AutoZone diy kit for $25. Be sure to wear eye protection and gloves when you connect to low/suction side. The system takes a lil over 2# IIRC.
gl!

 

Slightly low charge /end thread

 

In addition to the above suggestions, there are plenty of things that can go wrong in the A/C system but I'd bet the ambient temp switch is faulty and needs replacement. Sounds like it might be consistently telling the system "HOT".

BUT, as mentioned, before you start throwing parts at it though, have the system checked... leaks, switches, pressure/refrigerant level by a qualified A/C tech.

I recall our shop used to sell those "DIY recharge kits" and on hot days we'd get people lined up to buy them.... no matter how many times I'd tell them "you're throwing money at a problem without knowing WHY the system is low, let us check it out." Nup, very few took the advice and threw away the money.... (and invariably OVERcharged the system because "if some is good, more MUST be better..." Bzzzt.)

"OK then, that'll be $54.57 please. See you next week."

 

 

Should take less than 2 minutes.

AFTER removing front bumper cover.

I kid.... Not sure but I think it might be accessible from underneath. It's located down low in front of the radiator, almost dead center. Little square plastic box clipped on with a cable connector.

 

So i ran the self test on the 350z and when it got to the fan portion of the test. Only the passenger side fan spun and only on the low side of the test. So at this point I believe i will be replacing the cooling fans and maybe the relay and see if that helps. After i swap that out i will update on what happens, after that i will probably have an AC diagnostic done. If I'm off track or anyone has any other idea, let me know.