My AC gets a moldy or musty smell to it when I run it. I'm told my AC Drain tube may be stopped up. How would I get it uncloged? Or get the smell to stop?

Thanks
Chris

 

The condensate drain is at the base of the firewall on the passenger side. Get under there with a compressed air gun with a looong tube and bent tip and blow it out from below. Most shops have a modified air gun for this purpose.

As for the odor, there are commercial deodorizers make just for this purpose. Her are several examples: ACKITS.com Automotive Air Conditioning Parts & Equipment.: Evaporator Core Treatments (Odor Removal)