Question on A/C Recirc and non-recirc

[H2Finally]

L, I could never figure out how exactly mine works. Sometimes it will Recirc (green light on), sometimes it just flashes then remains off (no green light). I think it's got to do with either the Auto or if you adjust the fan manually. But for the life of me could not figure out which is which.

Most irritating when you see a dead skunk up ahead on Hawthorne and you're scrambling to turn on the recirc before the smell hits you and 2 out of 5 times it WON'T turn on!!!