Odor from HVAC vents on Volkswagen Rabbit

Condensation may develop in the heater case which can cause a musty odor from the heating, ventilation and AC (HVAC) system.  Our technicians tell us the drain system should be checked for debris. In addition, a cleaner is available for the heater case.

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Average mileage: 50,285 (13,000–95,000)
4 model years affected: 2006, 2007, 2008, 2009
11 people reported this problem
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problem details
2008 Volkswagen Rabbit 13,000 mi,
Turning on a/c smells like moldy socks for about 30 seconds to a minute!
2007 Volkswagen Rabbit 95,000 mi,
smells like cheesy feet
2007 Volkswagen Rabbit 40,000 mi,
Bad odor when I use the Conditioner.
2007 Volkswagen Rabbit 50,000 mi,
I had a similar issue and found that a cabin air filter replacement seemed to do the trick.
2008 Volkswagen Rabbit 44,000 mi,
musty skunk odor when ac has not been used in a while