Steve,
From your description I can see where introducing outside air into the cabin would in turn provide more cooling (or heating in the winter) air to the ECM than simply recirculating air within the cabin. When Klaus posted how the cabin circulation benefited the ECM, it was the first time I had heard that. So the ECM box must have an exhaust path. It would be interesting to compare the air flow OUT of the ECM box in both the fresh air and recycle modes to see how much difference their is.
Good point relative to the cabin filter. It's one of those things that I always "planned to do soon". I watched the Youtube video on how to R2 it so now that I'm an "expert" I will probably go ahead and order a new filter for both my 03 V70 and the wife's 05 S80.
|