Warm air from one a/c center vent?

[X5chemist]

When I rebuild a system, I put the total amount throughout components. Especially after an A/C flush and air blown down dry. A few ounces in each major component will distribute oil properly.

[EODguy]

Over here a condenser and dryer is ALWAYS replaced, since just cleaning can leave enough oil after a compressor failure that you can easily end up with too much oil in the system or crap from the compressor killing it once again...

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[BondoBen]

Both good points. Actually ordered 2 socks. Condenser still leaking just a tiny bit of oil as of last night. Socks due Sat. so by then condenser oil should be completely drained. Will install new sock and start over again. Should things go well.......all is good and we move on to the next BMW repair. If not........taking condenser out is easy so will look at condition of that sock and consider next move. Not a refrigerant repair tech......but..... that seems to be the next thing they would do. This time will take temp readings from around system. And just for the fun of it.......what should this new sock look like if I did pull it out? And agan......thank you.

[EODguy]

Originally Posted by BondoBen

Both good points. Actually ordered 2 socks. Condenser still leaking just a tiny bit of oil as of last night. Socks due Sat. so by then condenser oil should be completely drained. Will install new sock and start over again. Should things go well.......all is good and we move on to the next BMW repair. If not........taking condenser out is easy so will look at condition of that sock and consider next move. Not a refrigerant repair tech......but..... that seems to be the next thing they would do. This time will take temp readings from around system. And just for the fun of it.......what should this new sock look like if I did pull it out? And agan......thank you.

It should look like a clean string-less tampon.

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[BondoBen]

10-4

[BondoBen]

So.....got the dryer sock and installed it. Previous to this I disconnected everything from everything. Ran acetone though the lines (not compressor) and looked for any contamination. None. Blew air through each component and then ran A/C flush until was convinced anything in that part was free and clean. Nothing. Vac the system down and left for several hours. All good. Recharged the system and great news.....cold air. Until 6 hours later and the same problem. Checked pressures and yes......low again. Cold.....warm.....cold.....warm. Cannot fnd a leak to save my life. Later that night I'm showing grand kids the UV flashlight and noticed a faint hint of green on the driveway. It was so faint I almost missed it. Next day started the car with A/C on on placed a piece of fiberboard underneath where the A/C drains. Yep......dye. So I've found my leak.......I'm thinking......and a way to see if your evap coil is leaking. Had checked for dye around TXV access panel and always the same. Clean. So I thought the coil was ok. Not so. Any thoughts on my believing the evaporator core is bad? Again......thanks for the info and help.

[80stech]

Yep and the dye should show up on the drains not around the expansion valve unless it's those joints that are leaking.
You still need to look into getting the oil level right as well.
btw Dye is the only way to test that as well, old school leak testers can be fooled by moisture.
Leak testing with vacuum is not the greatest way to do it because it can suck oil off the compressor shaft seal but the leak should have showed up.