Sweet Smell from AC in Tesla Model Y
A sweet smell when the AC is on typically indicates a coolant leak from the heater core or AC evaporator. In a Tesla Model Y, this could be due to a leaking heater core or a refrigerant leak with PAG oil, which has a sweet odor.
Diagnosis Details
Possible Causes
Coolant leak from the heater core into the HVAC system
Refrigerant leak with PAG oil from the AC system
Mold or bacterial growth in the evaporator (musty, not sweet)
Related OBD-II Codes
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What You Should Do
Inspect the cabin air filter for coolant residue.
Check under the dashboard for signs of coolant leakage.
Have a professional test the AC system for refrigerant leaks and inspect the heater core.
If coolant is found, replace the heater core and flush the system.
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.
