AC Not Cold and Bad Smell - Toyota Camry 2020
The air conditioning starts cold but then becomes warm, accompanied by a bad smell. This typically indicates a refrigerant leak, a failing compressor, or a clogged/contaminated evaporator core.
Diagnosis Details
Possible Causes
Low refrigerant charge due to a small leak (e.g., at O-rings, condenser, or evaporator). The system cools initially but loses pressure as it runs.
Failing A/C compressor clutch or internal compressor wear. The compressor may engage at first but then disengage or lose pumping efficiency.
Clogged or dirty evaporator core causing poor heat exchange and musty/sour smell from mold or bacteria buildup.
Expansion valve or orifice tube restriction, leading to intermittent cooling and potential odor from moisture or debris.
Related OBD-II Codes
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What You Should Do
Have the A/C system inspected by a certified technician.
They should check refrigerant pressure, look for leaks with a UV dye or electronic leak detector, inspect the compressor operation, and clean or replace the cabin air filter and evaporator if mold is present.
A system evacuation and recharge may be needed.
Related 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.
