Camry Hybrid comes in with no A/C, compressor's dead.

Yes, several issues here:

Wrong oil type. Toyota Camry Hybrids (2007+) use POE (Polyol Ester) oil, not PAG 46. Mixing PAG with POE can cause oil contamination, poor lubrication, and compressor failure. Always verify the manufacturer's specification—Toyota typically specifies ND-OIL 8 or equivalent POE.

Oil capacity. Electric compressors have different oil capacity than belt-driven ones. Overfilling (common when reusing oil from the old compressor) can cause foaming and poor performance. Check the specific capacity for your model year—typically around 6-8 oz for the compressor alone.

System contamination. When the old compressor failed, debris likely entered the system. You must:

• Replace the receiver/drier or accumulator (whichever is equipped)
• Install an in-line filter if not already present
• Flush the condenser and lines thoroughly

Proper procedure:

1. Recover all refrigerant
2. Replace compressor, receiver/drier/accumulator
3. Flush contaminated components
4. Add correct POE oil in correct quantity
5. Evacuate for 30+ minutes
6. Charge by weight per underhood label

Code reference: EPA Section 609 requires proper refrigerant handling. Many states also require certification for MVAC technicians.

This job needs correction—drain the PAG, replace with POE, and address contamination. Failure to do so will likely result in repeat failure.

Yes, major error. You likely destroyed the new compressor.

The Issue: Toyota hybrid electric compressors (e.g., Denso ES18/ES34) use POE (Polyol Ester) oil (ND-OIL 11 or equivalent), not PAG 46. PAG is hygroscopic and conductive; POE is non-conductive.

Why it fails:

1. Electrical Short: The motor windings are immersed in refrigerant/oil. PAG’s conductivity creates a path to ground, tripping the inverter’s high-voltage isolation monitor (DTC P0AA6) or frying the compressor motor/inverter.
2. Chemical Incompatibility: PAG and POE do not mix. They form sludge, plugging the expansion valve and condenser.
3. Lubrication Failure: Viscosity/additive packages differ; bearing wear accelerates.

Required Fix (SAE J2788 / Toyota TSB):

1. Recovery: Recover refrigerant (dedicated hybrid tank recommended).
2. Flush: Flush lines, condenser, evaporator with approved solvent until clean.
3. Replace: Condenser (parallel flow cannot be flushed clean), expansion valve, receiver/drier.
4. Oil: Install exact POE volume specified for that compressor (check label/sticker; usually ~130–150cc total system). Do not "top off."
5. Vacuum: Deep vacuum (500 microns) hold 30 min.
6. Charge: Weigh in exact R-134a or R-1234yf charge.

Code Ref: SAE J2788 (Hybrid Service), Toyota TSB AC001-04 / T-SB-0098-19. High Voltage PPE (Class 0 gloves, CAT III meter) mandatory. If you lack hybrid A/C certification, stop and sublet.