Ac not cooling. added about 2 lbs r134a, clutch is engaging, not sure if compressor is working.

you have no R134a Freon (puron) refridgant now.
no problem told at all, car out of warranty????????
sure AC is dead right can we know this first?
first off learn how AC works or gue$$sing will be super expen$ive.
the PCM and BCM brains run AC
and has lots of rules to do so.
and those brains cut the AC dead for many reasons even 10 .
OK this is rule #1 to learn
fuses good (the endless story here)
1: fuses good;.as in ALL.
2: scan the PCM for AC errors. really jack in to the obd2 port under dash and scan it or go broke fast guessing
3: if the input to the AC relay is dead wrong why blame it? IDK?
4: the blower in dash must blow on high does it? it must !!!!
5: the AC lamp on dash controls must glow when turned on and it must; or we fix that first.
6: the knows set to recirc mode, hot/cold spun to full cold., and vents set to what you want I try them all fore sure front vents.
7: the AC clutch energizes. if not see below. causes.(not from above)
8: R134a high/low switch (pressure transducer) is tripped to low and AC is shut down on purpose or is too high, overfilled R134a causes that. for sure
9: the bend door struck closed, may case the evap to ICE UP
and trip off the clutch.
10 does the evap core tubes fell cold?
11the blend door most block heater core to get COLD air.but will not sure if clutch is not engaged sure.

you pulled vacuum on the new system for 30min + ?
and put in the correct by weight of R134a?

the AC shuts down if engine pcm detects overheated even ECT lies
or ECT is stuck in an air pocket air on cooling loop.
see why we scan all cars, for sure
AC shuts down if engine is overload, even if map or MAF sensors lie to it. (again we scan ALL THAT)
AC SHUTS DOWN IF PCM SEES FRONT FANS FAILING
AGAIN SCAN IT.
THE CAR RUNS VARIABLE GRADE COMPRESSOR, THAT MUST BE THE CORRECT PART.
F36 AND F32 MUST NOT BE BLOWN
THE WORDS NON SERVICABLE, MEANS THE WHOLE BJB MUST BE REPLACED FOR 1 RELAY BAD. SUX SURE.
BUT THE 2 FUSES MUST BEG GOOD 12VDC BOTH SIDES KEYON
THE PIN 32 AT 12VDC, RUNNING AC ON.
PIN 5 IS 0V AC ON BUT IS AT 13 TO 15V ENGINE IDLING AND ACT ON THIS MEANS, PCM DOES NOT WANT TO TURN IT ON
ON PURPOSE AND MY LIST ABOVE SHOWS MOST OF THEM


LEARN THAT NEWER CARS ARE WORST
TO SAVE FUEL AND CO2, OUTPUT THE THERE ARE
LOTS OF AMBIENT SENSOR TOO THAT MUST BE IN RANGE.
SCANNING THE OBD2 PORT IS THE ONLY WAY TO FIND THIS OUT.
PIN 36 IS THE VARIABLE. ACCV SOLENOID, NOT SURE ME
IF BAD WHAT THE COMPRESSOR DOES I GUESS GOES TO LOW OUTPUT NOT DEAD.

The pressure is off, keeping the system from running. It needs to be adjusted by a professional with the proper tools and manufacturers info.

It sounds like you've done just about everything except to check if there is a bad or intermittent wire causing this or perhaps your low-pressure safety cutout switch is possible going bad causing the compressor to kick on and off?

have you tried charging the ac system? most ac compressors have a pressure switch that will not allow the relay to engage the clutch if the coolant pressure is low. $15 can of r134a and maybe a $20 Haynes manual is well worth the price difference, eh?

Did you replace the expansion valve?
Also try adding just a little more freon and see if that makes a difference....is there a sight glass you can view with the system activated to be sure you have it completely air free?

to prevent damage to the air conditioning system there is a "low pressure switch" located on the condenser near the low pressure hose (large one) .. if the refrigerrant (R134A) gets too low then the clutch will be blocked from activating by that switch .. you can have your system tested and recharged or you can do that yourself .. the R134A is available at auto parts stores .. some come with a gague that is required for proper charge .. if you dont already have a gage then yoiu will need that one ... recharge kits often come with instructions .. other less likely but possible problems could be a fuse or bad AC clutch relay. sometimes damaged wiring or bad clutch will be the problem but much more likely just low fluid ..

I would check the following possibilities:
1. Is compressor clutch working? - You need to do this when the ac is blowing hot air only - locate compressor drive pulley on engine - rubber belt wraps around it. Start engine and set to max ac. When the ac is blowing hot air, look at the center of the compressor drive pulley using a good flash light - watch it for a while, it should be spinning with the pulley - this means the compressor is engaged. If not, the compressor is not engaged. If your ac is blowing hot air, then the compressor should be engaged and running (trying to cool). If it is not engaged, then your compressor clutch is probably going out. Could be low voltage to clutch, but more likely the clutch is worn out and only working some of the time. Note: if working normally, the compressor clutch will engage and disengage in cycles- but the air should always be cold. If clutch is bad, compressor would need to be replaced (sold as one unit). This is tricky to diagnose and could take some time - you need to do it when ac is blowing hot air but set to max cooling.

2. Low on refrigerant or refrigerant has moisture in it? If your ac blows cold initially after being off for a while, then heats up, and continues to regularly cycle back and forth between hot and cool air, then the system may be low on refrigerant or the refrigerant may have moisture in it that is freezing and restricting refrigerant flow. An a/c shop can check refrigerant level and even replace refrigerant if moisture is suspected.

Could be other issues, but I would start with these.

Good luck

providint the clutch isnt engaged no problem

The compressor will not run without a minimum amount of R-134A. In some cases the compressor will shut itself down and require a reset (disconnect neg battery cable for 20min) prior to adding refrigerant. Best of luck with your AC issue.
Greg

You might not have enough R134A in it the system should hold 3 - 5 lbs of pressure if I remeber right. But if the clutch is kicking in then its working but you might not have enough R134A. Buy the kit that has the pressure guage with a trigger on it so you can add what you need. When you fill it turn car on and ac on high then fill it. When ac is off the clutch should spin freely if not then your compressor is junk. As for the slight grinding noise just to make sure with CAR OFF turn the clutch on the compressor and make sure its not rubbing the pulley on the compressor.