I'm having a issue with my ac system, I have a leak but I can't find it. I took it to the mechanic he checked it and refilled the system 1 week later it was blowing hot air. So I bought this special ac refill with dye in it refilled it and I tried to look for the leak all over the engine bay but still no luck. Compressor and the ac lines around it seems ok no leak the condenser seems fine also. I'm really getting stressed and might end up going to the dealer.
2013 lx570 ac problem 😔 (1 Viewer)
- Thread starter Chucky313
- Start date
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Are you using a "black light" flashlight to find the dye? Try tracing each line on the system:
If I'm not mistaken, their are also AC lines that go to the rear, so you'll have to get underneath and become really familiar with the system. Other possible AC leaks could occur at the compressor, along aluminum lines, and at the connection points to front/rear cooling units.
Unfortunately there's no easy way to check all of these spots without adding dye and tracing every system component. After you find the leak, you'll have to replace the offending/leaking component, apply vaccum to the entire system (to re-check for leaks) and refill with refrigerant. It's a process that requires specialized equipment to do properly. I believe the refrigerant in the LX is 1234yf, but double check under your hood.
If I'm not mistaken, their are also AC lines that go to the rear, so you'll have to get underneath and become really familiar with the system. Other possible AC leaks could occur at the compressor, along aluminum lines, and at the connection points to front/rear cooling units.
Unfortunately there's no easy way to check all of these spots without adding dye and tracing every system component. After you find the leak, you'll have to replace the offending/leaking component, apply vaccum to the entire system (to re-check for leaks) and refill with refrigerant. It's a process that requires specialized equipment to do properly. I believe the refrigerant in the LX is 1234yf, but double check under your hood.
- Thread starter
- #3
Thanks for all this info, I haven't checked underneath the vehicle but I will. I do have the uv light still nothing around the engine bay. But imma check the rear ac. The ac is r134a.
If you can’t find the leak outside, it’s likely the evaporator core that’s leaking. It’s usually buried inside the dash and gotta take the entire thing apart to get to it.
- Thread starter
- #5
I hope not. Imma take it to a special place where they pressurized the system for the leak.
- Thread starter
- #6
Plus forgot to mention, whenever the system is out of ac freon. I get a dtc code b1423 Open in pressure sensor circuit / Abnormal Refrigerant Pressure
bloc
SILVER Star
The leak is most likely under the rear of the vehicle where the lines run up into the rear AC module. A few users have posted about this in the past.
- Thread starter
- #8
I will check it out thanks.
- Thread starter
- #10
It's at the dealer now, I dropped it off. So imma see whats the issue is.
- Thread starter
- #12
So an update from the dealer, the leakage came from the ac fill port high pressure line. They replaced the ac valve stem and the leaked stopped.
