A/C Not Cold and Bad Smell Diagnosis
The A/C starts cold but then becomes warm, accompanied by a bad smell. This suggests a refrigerant leak, a failing compressor, or a clogged evaporator with mold/bacteria growth.
Diagnosis Details
Possible Causes
Low refrigerant charge due to a leak (common at seals, compressor, or condenser)
Faulty A/C compressor (internal leak or clutch failure)
Clogged or dirty evaporator with mold/bacteria causing bad smell and reduced cooling
Expansion valve or orifice tube blockage
Related OBD-II Codes
Not satisfied with this diagnosis?
Try Another DiagnosisWhat To Do Next
What You Should Do
Check refrigerant pressure with a manifold gauge set.
Inspect for visible leaks (dye test).
If low, recharge and add UV dye.
If compressor cycles on/off rapidly, suspect low charge.
For bad smell, clean evaporator with A/C coil cleaner and replace cabin air filter.
If compressor fails, replace compressor, receiver/drier, and flush system.
Related Repairs
Share this diagnosis
Help others with similar symptoms
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.
