It's been smoky here in Oregon for a while now but this morning was exceptionally bad with an AQI of around 300. The air in my garage (and in my car) was still relatively clean from last night so I turned on recirculation before I left. A couple of minutes later I noticed a smoky smell and when I looked down at the recirculation button it was off. Turned it back on and the same thing happened again a couple of minutes later. This doesn't happen when it's hot out so I think it's something to do with the heater running, maybe humidity control? I'd rather it be humid than horribly smoky... Has anyone else experienced this? Is there any way to override the auto HVAC setting and just run the fan?