AC Not Cold and Bad Smell - Honda CR-V 2020
The air conditioning starts cold but then becomes warm, accompanied by a bad smell. This suggests a refrigerant leak, a failing compressor, or a clogged/contaminated evaporator causing odor.
Diagnosis Details
Possible Causes
Low refrigerant charge due to a slow leak (e.g., at seals, hoses, or condenser). The system cools initially but loses pressure, causing warm air and potential moldy smell from moisture.
Failing A/C compressor clutch or internal leak. The compressor may engage at first but then disengage or fail to maintain pressure, leading to intermittent cooling.
Clogged or dirty evaporator core with mold/bacteria growth. This causes bad smell (musty or sour) and reduced cooling efficiency.
Expansion valve or orifice tube issue, causing improper refrigerant flow and temperature fluctuations.
Related OBD-II Codes
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What You Should Do
Have the A/C system inspected by a professional.
They should check refrigerant pressure, look for leaks (using UV dye or electronic detector), inspect the compressor operation, and clean or replace the cabin air filter and evaporator if odor persists.
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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.
