I'm having trouble with my heating system.

What is your question?

I get good heat blowing when on defrost , but no heat blows out when I set the control to the floor. I took it to the dealer and they said it works ok. I told them that it's really cold on my legs when I drive on the freeway. They honestly told me that I shouldn't drive on the freeway when the temperature is below 10 degrees. This was the biggest load of BS I've ever heard. Please help if you can by giving me a reasonable explanation of what the problem could possibly be. The car is under warranty and I honestly believe that the dealer wants to wait for it to expire. Thanks a lot.

What makes this problem better or worse?

There is never a difference. It doesn't blow on the floor.

How long has your 2015 Nissan Murano had this problem?

About 1 year