I bought a can of 1Z Klima Cleaner to get rid of the musty smell coming from my AC. They originally sold this for you to inject through your air vents.
However the company's american website now says not to do it. I called them to ask why and they said they've had cases of people frying their ECU
because the stuff floods the area with the evaporator core. Is this the case with a 2012 Mazda 3? I'm tempted to get a cheap usb scope camera to
verify. Otherwise can I stick it in through the cabin air filter side?

http://www.1z-usa.com/products/klima...fessional.html