Smelly AC on windshield defrost.

[jayeh]

Hey Guys, I seem to have a nasty smell coming out of my vents intermittently when my windshield defroster is on. If I switch it to windshield then turn the heat up it smells bad for a little while. It's a pretty sharp chemical smell. It doesn't last very long.

The a/c seems to work fine, the fan works on all settings and modes, I can't seem to figure out if anything is the problem.

I just installed a new stereo, but I can't figure out how I could have screwed up anything doing that. I checked the AC section of the FSM and I didn't really go near anything important there.

Does the AC come on automatically when the defroster is turned on in the Yaris?


TIA for any ideas!