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Volkswagen Jetta TDI Car Problems

Odor from HVAC vents on Volkswagen Jetta TDI

Problem Description and Solution

Condensation in the heater case may cause a musty odor from the heating, ventilation and AC (HVAC) system after sitting for two hours or more. Our technicians tell us that a cleaner is available for the heater case and the drain system should be checked for debris.

(19 people reported this problem)

Problem Data

RepairPal Verified
Average mileage: 58,383 (10,000–123,000)
8 model years affected: 2002, 2005, 2006, 2009, more2010, 2012, 2013, 2014

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Viewing 1-11 of 11 comments
Vinegar like odor from HVAC. Becomes pronounced when AC is on. Have not solved yet, will likely take to dealer for cleaning.
I have noticed when I started using the AC in the Spring now, AC smells like mold. After leaving the fan on high for a few minutes, the smell disappears (and or i'm just getting used to it).
I have begun to notice a distinct smell of antifreeze in the car, especially when climbing mountain ranges. The smell emanates from the vents even if the fan is completely turned off. No solution yet, but I suspect a slight leak in the heater core or the attached hoses. It resulted in extremely lungs for several weeks after an 8 hour road trip.
Strong odor of vinegar in HVAC began while driving in a humid climate. After spraying the special foam deodorizer that A/C repair shops use
(purchased on Amazon.com) into the cabin air intake and then changing the cabin air filter there was a 50% improvement. Then, about a week later I searched under the seats again and discovered the problem. - I recognized a slim take-out tray of left-over chicken with teriyaki vinegar sauce! It had been there for over a month.
Used purchase smell after a month

Spray Lysol into outter intake vent by driver side wipe with Ac running on high

Also turn off AC 10 mins before you know your turning things off.
A musty odor coming from the air conditioner vents. Dealer offered to check it for a price, we decline and bought a new AC filter from auto parts store, which I will replace myself.