She's blowing hot. Took her to my local independent guy (former rover mechanic) i've been using for years; he charged her and said she was blowing cold. By the time i grabbed her, she wasn't.



He said he put the UV die in it so if it leaked we could find it. I saw nothing with my UV light and still can't find it. I put another can in with UV die - nothing.



The system has no pressure.... 0 KPA's according to my cheap scan tool.



This is how i found it..

https://imgur.com/8ntqAtB


This is after a small can of 134a....


https://imgur.com/wRqXI1n




She blows slighly cooler after the 134a is in... she was blowing 100 before... blew 80 after (it's 91 today here in NY State).



Clearly i have a leak; i can't find it with the UV light....



what to do... what to do.....

 

Uh oh. No responses. What does this mean?


For what it's worth, I threw 134a in the system and as I was doing so the compressor kicked on.... air went from 100 to 58. I thought i was in the clear (even through this same exercise was done 3 times). The difference is the car blew cold for an hour and maintained pressure. Assuming it was fixed, I turned her off... came back a few hours later.... and she's not blowing cold.


It would seem as if she'll maintain pressure until i turn the car off.


What could possibly cause that symptom? That seems so odd to me.

 

You obviously have a leak.

The not obvious place to look would be the rear AC lines. I’m assuming it’s a 7 seater with rear HVAC. Check the evaporator at the rear drives side and follow the lines.

 

Yup, leak. Keep checking. There is a coupler above the rear diff area, if you have the rear AC. On mine, its leaking there a little as I can see oil covered dirt from that coupler down the line. Looks like a pain to get at so for now I put in some leak-stop.