AC Not Cold with Bad Smell and Won't Turn On
The air conditioning system is not producing cold air, emits a foul odor, and fails to activate. This suggests a potential refrigerant leak, compressor failure, or electrical issue, possibly combined with mold or bacterial growth in the evaporator.
Diagnosis Details
Possible Causes
Refrigerant leak (e.g., from seals, hoses, or condenser) causing low pressure and preventing compressor engagement
Faulty AC compressor or clutch (electrical or mechanical failure) preventing system activation
Mold or bacterial growth in the evaporator core causing bad smell, often due to moisture accumulation
Blown AC fuse or relay, or wiring issue (e.g., corrosion) interrupting power to the system
Related OBD-II Codes
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What You Should Do
Check the AC fuse and relay in the fuse box; if blown, replace and test.
If not, inspect for visible refrigerant leaks (oily residue) and use a manifold gauge set to check pressures.
If low, recharge with dye to find leaks.
For bad smell, use an evaporator cleaner or replace cabin air filter.
If compressor doesn't engage, test clutch coil resistance and voltage.
Consult a professional for complex repairs.
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.
