I also posted this on the knowledge base. I noticed that when my climate control system is in AUTO mode, the fan speed never drops down to the lowest speed. It stays at something intermediate, resulting in excessive cabin noise from the fan. Temperature seems OK, but the fan is running excessively. It is as though it doesn't even know it has a low speed. Anyone else noticed this. My MDX is a 2001 and has 10,000 miles on it. Thanks everyone!