My A/C is not cooling just hot air come out?

Tiny
BELLA EL
  • MEMBER
  • 2015 NISSAN ROGUE
  • 35,000 MILES
My A/C is not cooling just hot air come out. The mechanic changed a lot of things; like A/C compressor but no change.
Wednesday, October 2nd, 2019 AT 3:59 PM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Hi,

We need to start with the what the pressures are. Did they happen to tell you or are you able to hook up a gauge set to get high and low side pressures? Don't use one of the gauges that come on the Freon bottle. We need an actual gauge set to get an accurate reading. We need to know what they are with the engine off and running with A/C turned on. Then we need to know if the compressor is coming on or not. Clearly we can assume it is not the compressor if it was replaced but if it is not coming on then we have a different issue then if the pressures are not correct.

This sounds like the compressor has gone out or the system is low on charge or a fuse is bad, these videos and guides can help us fix the problem with diagrams below to show you how on your car. I have included (below) the air conditioner wiring diagrams as well so you can see how the system works.

https://youtu.be/4UjfQKvrB6Y not working

and

https://youtu.be/uZrQCGwXfek recharge

and

https://youtu.be/yrhWKlQEPWw leak detection

and

https://youtu.be/4EqdrBVb0sY vacuum and recharge

and

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Let us know what happens and please upload pictures or videos of the problem.
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Wednesday, October 2nd, 2019 AT 6:02 PM

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