Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - AC blowing hot air after different attempts of trying to fix it

RZNT4R · 09-04-2022, 09:41 AM

If the car was empty before you put that over-the-counter junk into it you could have charged it with nitrogen to look for leaks but now that it's full of junk you're SOL. You didn't even need to touch the refrigerant side to start diagnosis, a scan tool with OEM level data and a test light would have worked. Peek at the AC pressure, A/C request and clutch enable PIDs (those are not always available over generic EOBD) with the scan tool, that would have been 80% of the diagnosis work without even unscrewing the port caps.

But now you've touched it too much and IMO you're at an impass: You've got leak sealer and an unknown amount of oil in the system (from the compressor replacement if you didn't balance the oil quantity) and unknown system integrity. You can't empty it out to flush it for a lack of equipment and you can't dump it out to atmosphere because that's very illegal and very very bad, 1400x worse than CO2-bad.

Take it to a pro, at this point it needs it.

09-04-2022, 09:41 AM	#7
RZNT4R Professional Mechanic Join Date: Apr 2010 Drives: 2017 86 6MT Oceanic Location: Quebec, Canada Posts: 789 Thanks: 17 Thanked 634 Times in 371 Posts Mentioned: 12 Post(s) Tagged: 0 Thread(s)	If the car was empty before you put that over-the-counter junk into it you could have charged it with nitrogen to look for leaks but now that it's full of junk you're SOL. You didn't even need to touch the refrigerant side to start diagnosis, a scan tool with OEM level data and a test light would have worked. Peek at the AC pressure, A/C request and clutch enable PIDs (those are not always available over generic EOBD) with the scan tool, that would have been 80% of the diagnosis work without even unscrewing the port caps. But now you've touched it too much and IMO you're at an impass: You've got leak sealer and an unknown amount of oil in the system (from the compressor replacement if you didn't balance the oil quantity) and unknown system integrity. You can't empty it out to flush it for a lack of equipment and you can't dump it out to atmosphere because that's very illegal and very very bad, 1400x worse than CO2-bad. Take it to a pro, at this point it needs it.