So after I stalling a new compressor, condensor and drier. I filled the system with refrigerant and started the car to see if it was blowing cold air. The air coming out was blowing cold as I turned on the A/C and heard the clutch engage, but after having the A/C on for about 10-20 min the clutch didnt disengage. If I dont recall it should kick on/off periodically. I Was worried about burning the compressor out so I turned it off.

I haven't replaced the A/C pressure switch or expansion valve (not looking forward to ripping dash out). Hoping for just the A/C switch needs to be replaced.
Any information as to why it stays engage would be helpful. 🤙🏽

 

Did you use a vaccum to suck the system down before filling with refrigerant?

 

The clutch cycles when there isn't enough pressure

 

I used a professional A/C machine, and vaccumed the system before putting refrigerant inside and the gauges never displayed any leaks.

 

If the system dosent cycle off then should I replace the Pressure sensor switch on the drier?

 

Are you saying the clutch is still engaged when the A/C is off? The clutch is not suppose to cycle when the A/C is on.

 

#1 are you saying the compressor runs with the A/C set OFF?
#2 whats pressure readings and ambient temp?

some times low charged systems the compressor stays on way to long..

 

No the clutch isn't engaged when I have the A/C off. My original question was when I have the A/C on and how the clutch operates.

I figured the clutch on the compressor is meant to cycle on/off when I have my A/C on because my other cars do so.

So is it normal for the clutch on 350z A/C compressor always stay engaged when you have the A/C button toggled on?

 

^^^