I did go through another thread of posts about this topic but I didn't see the answer to my question. I only occasionally have the need for the recirc. button, when a stinky diesel is in front of me usually. As soon as I start smelling the fumes, I reach over and press the recirc. button. It flashes about 3 times then goes off again. What does that mean? Why won't it stay on? My husband thought the defogger/defrost had to be off in order for it to work, but I tried it this morning, and the defogger was not on, and it still didn't stay on recirc. Is something wrong or am I doing something wrong? ???