Ac is not getting cold when ilde

[MacAmb]

Hello guys whats up.i have kia cadenza 2011 V6 3.5L.
Before a couple year ago I have noticed my car's A/C is not getting cold when it is idling and it make a little hissing noise this only happens sometimes when on a traffic so I have taken it to a repair and have checked the high pressure pipe was leaking so he replaced but after a few months the new pipe just got broken again so i took it to him again he said if you dont change the compressor it will keep breaking the H pressure pipe,so i have searched over internet all of the answers were pointed about expansion valve.so i want to make sure what is the exact problem could be before i waste my money on a new compressor.
Already checked those Freon level is 35 psi fan is working fine and debris and dust and the condenser is ok.

[Cusser]

Can you provide both high and low AC pressures at about 2000 rpm? And are all the electric fans in the engine compartment spinning when the AC is on?

[MacAmb]

Well i took this pic a while back ago but not 2000 rpm

large.jpg (75.97 KiB) Viewed 11070 times

But yesterday i checked the low pressure at about 2000 to 3000 rpm the low side was 35psi

[MacAmb]

Updated:
at 2000rpm H was about 125psi
The L was 20 psi

[Cusser]

Updated:
at 2000rpm H was about 125psi
The L was 20 psi

Refrigerant leak. Or refrigerant low to start with after repair.

[MacAmb]

Yea checked the pipes couldn't see any leaking .but what is causing Refrigerant to be low?

[Cusser]

Yea checked the pipes couldn't see any leaking .but what is causing Refrigerant to be low?

A leak. Oftentimes a combination of visual inspection, UV dye, electronic sniffer, and soap bubbles must be used to find a leak.

[bohica2xo]

Well, we didn't have a Cadenza here in the US, but the 2011 Sorrento has the 3.5L V6.

The 3.5 has a direct drive compressor, with an electronic control valve. It runs 100% of the time.

So your issue could be an undercharged system, a bad control valve, a wiring issue or a worn out compressor.

Start with a scan tool. The OEM scan device can alter the compressor output manually for testing.

[MacAmb]

I used a soup bubbles but couldn't find a leak maybe its a small one.but i can see a little oil drops on the High pressure pipe surface.

Some others keep saying its an expansion valve

[Cusser]

I used a soup bubbles but couldn't find a leak

Well, I've heard that chicken soup can fix anything !!!

i can see a little oil drops on the High pressure pipe surface.

That's what I mean with "visual inspection". If there's refrigeration oil getting out, so is refrigerant.