I don't get rhe sound everyone's talking about in those posts. No sound changes at all. Just the LED lights up in the recirc button and nothing else. I read the threads you're talking about but my issue doesn't seem to relate to those.

I have an 03 Vibe. The A/C works fine with the recirc button off (all speeds). When I press the recirc buttin, however, only the light within the button lights. The blower speed doesn't change like it used to and it still seems to be pumping in air from the outside. It used to be much colder this wa...