Sweet Smell from AC in 2020 Honda CR-V
A sweet smell from the AC often indicates a coolant leak from the heater core or evaporator, as coolant has a sweet odor. This can lead to foggy windows and potential engine overheating if not addressed.
Diagnosis Details
Possible Causes
Leaking heater core – coolant leaks into the cabin via the HVAC system, producing a sweet smell when AC is on.
Leaking evaporator core – refrigerant or condensation issues can sometimes produce a sweet or musty odor.
Coolant leak from hoses or radiator – coolant may enter the cabin through the ventilation system if the leak is near the firewall.
Related OBD-II Codes
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What You Should Do
Inspect the cabin for coolant residue, check coolant level, and look for leaks under the dashboard or near the heater core.
Have a mechanic perform a pressure test on the cooling system and HVAC system to locate the leak.
If the heater core is leaking, it will need replacement.
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.
