Nissan Sentra AC only works sometimes and even then not good

Maintenance/Repairs
1

2015 Nissan Sentra, 56K. I bought it used last November and the AC worked great then! (It gets cold in the winter where I live). Since the summertime, the AC only actually works about half the time. When it doesn’t work, I turn off the AC, wait a few minutes, hit the AC button again. I might have to repeat a few times and then it works.

When it does work, the air is cool to chilly, but never really gets cold. I tested the coolant pressure and that was exactly where it should be.

Any ideas?

2

Exactly how did you do that?

Tester

1 Like
3

A can of coolant charger with a gauge attached to it from the parts store

4

That right there tells me you don’t have the proper equipment or experience to be attempting to repair an AC system.

Take it to a shop that does.

Tester

4 Likes
5

I wasn’t so much looking for a fix, but wanting to narrow it down before I took it in.

6

You can’t narrow it down without the proper equipment.

Tester

2 Likes
7

Variable displacement compressor; sounds like the control valve is sticking. Have you verified clutch engagement?

8

So you know the low side pressure, what is the high side pressure reading?? What are they reading when the ac is cold vs when not cold??

Like Nevada said possible A/C Compressor Control Valve, if so, how do you plan on replacing it??
Evacuate and recover the R134a freon (not coolant), replace bad part, pull a vacuum on the system for 15-30 minutes, refill to the proper measured amount and retest to confirm repair??

As already said, A/C systems are one of those things that a DIYer’s can screw up and cost themselves more money in the long run… Leave it for the Pros…

2 Likes