So what would cause this.... The heating system in my 04 Acura MDX is only displacing temperatures at it's extreme potential. Turning it all the way down to 60 degrees, blows ice cold air, turning it up only one degree to 61, and I get HOT air! There is no between and I have to keep switching between 60 and 61 to keep it regulated. What in the world would cause this? THANKS!