Loud clicking/knocking when fan is turned to anything except circulation

When I turn on the air, if it’s on any setting other than circulation, it takes a second to start making the noise but when it starts it’s a loud knocking/clicking noise that seems to be coming from near the glove box but maybe a little lower. Changing the A/C off or on doesn’t change it, neither do any heat settings. I do need a new high pressure A/C switch pigtail, because something chewed on it. I’m not sure if that’s the source of the issue or maybe an actuator?