AC Not Cold, Bad Smell, and Won't Turn On
The air conditioning system is not functioning, emits a foul odor, and fails to turn on. This typically indicates a major electrical or refrigerant system failure, possibly involving the compressor, blower motor, or a refrigerant leak with mold growth.
Diagnosis Details
Possible Causes
Failed AC compressor or clutch (electrical or mechanical failure preventing compressor engagement)
Blower motor resistor or blower motor failure (causes no airflow and may produce burning smell)
Refrigerant leak with moisture/mold contamination (causes bad smell and system pressure loss, preventing compressor start)
Faulty AC relay, fuse, or control module (electrical issue preventing system power)
Related OBD-II Codes
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What You Should Do
Check AC fuses and relays first.
If electrical is fine, have a professional inspect the compressor clutch, blower motor, and refrigerant pressure.
A bad smell suggests mold in the evaporator or a refrigerant leak; a system evacuation and recharge may be needed.
Do not operate the AC if it won't turn on to avoid further damage.
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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.
