If the AC in your 2015 Volkswagen Passat or musty, you can usually clear it up at home. Learn the real causes, safe DIY fixes, and when to see a mechanic.

If the AC in your 2016 Honda Accord smells bad, you can often track it down to mold, bacteria, or a clogged cabin filter. Learn what causes the odor, safe DIY fixes, and when it is time to see a mechanic.