Odor with HVAC in 14 Corolla

[Bill L]

Has any experienced a musty or urine odor when turning on HVAC?

 

[Rick Barros]

I have a '14 Corolla S with bit over 33K miles, and for a while I was detecting a faint odor. Yesterday went ahead and went to Walmart and got me a K&N cabin air filter and replaced it, and now it does not smell weird anymore. I suggest you replace the cabin air filter too. Here's a video explaining how to do it:

 

[Shannon]

Before you shut your car off, turn off ac but leave the circulation button on,It's also in the owners manual. I had same problem took car to dealership and told me what to do.