Automotive Air Conditioning Information Forum

Refrigerant was put in with dye by auto shop. After 12 days, leak was found at the high side line where it meets the condenser (please see photo below). Could the leak be due to a leaky o-ring? I was told that the leak is likely at the condenser assembly itself instead of the o-ring.

The AC ...

I've been lending my white 1998 Frontier (288K miles) to my daughter and son-in-law. Apparently 2 weeks ago when it rained in Phx, he tried to rotate the air controller to "defrost" position, and something broke. It turns out that in the approximately 10 years Kori returned the Frontier to us that ...

Disclaimer - I'm not an AC professional.

To me it looks like the O-ring is in the correct place and still larger than the strange "flare" so it might work/seal OK. Does it seat if you test fit it without the O-ring on?

However, I once had to deal once with with the only new high pressure line ...

I have also seen fans that had gotten tired....spinning, but with little force....you have to check everything...

Good point about the electric fans.

You hadn't mentioned that the electric fan(s) were inoperative, JohnHere had to ask about that. We only know what the post author tells us ...

tbirdtbird wrote: Sun May 18, 2025 9:02 am Evaps are famous for leaks. It leaks when the comp is running because of the increased pressure.

Disclaimer: I'm NOT an AC professional

Wouldn't an evaporator have about 30psi pressure while compressor is engaged and static pressure of maybe 90psi when not engaged???

Did either of you read my post all the way through?
The first test of a new system is to see if the thing holds vacuum.

I need to pressurize the system with nitrogen. If I use shop air or add refrigerant prematurely I risk ruining the desiccant.

...

Yes, I used my Chemistry degree, Phi ...

Issue:
System will not hold vacuum, post-replacement. System equalizes from vacuum in just 30mins, which suggests (to me) a rather large opening... somewhere.

I realize that negative pressure indicates an opening in a system, while positive pressure reveals it. I lack the equipment to put the ...

BobbyZ wrote: Tue May 06, 2025 10:00 am Ambient temp 75, humidity 40%.
After car was warmed up, I revved the engine to between 1500-2000 rpm. Low side as 25, high side was 180.
Are my pressures in line. ?

Sounds decent; wait for temperatures over 75F and see if you and passenger are cool

GMBDguy wrote: Mon May 05, 2025 9:30 pm Should I just always replace the schrader valves on older systems while empty? Seems like its cheap insurance.

I would. Even though the cap is the "real" seal.

BobbyZ wrote: Tue May 06, 2025 6:03 am I just installed and charged a KIA K900 with two 12 oz cans of 134a and the readings I get are about 47 on low and about 147 on high side. This is with ambient of about 72 degrees.

Are those readings taken/measured at about 2000 rpm ? That is important information.