Quote Originally Posted by foama View Post
I'm saying the air coming inside is blowing at 3.5°C = 6°F hotter into the cabin than it is outside!
This still doesn't sound like a problem to me. It seems completely normal. I would expect the air temp to have a slight increase.

If you told us the air temp from the vent was 50°F warmer than the outside air (with the heat off), then I would think there's a problem. I'll check mine this weekend.