What might cause 2006 Nissan Titan clicking noise under dash?

The 2006 Nissan Titan clicking or ticking noise in the dashboard is a sign that You might have a defective blend door actuator. The blend door actuator is located behind the dashboard on the passenger side footwell. It will be positioned on top of the boxAssembly of the heater. To gain access to the actuator, You may have to remove the dash and it can be a tough job that needs some intensive labor to remove and repair it. Some of the signs that You might have a defective blend door actuator are that noise from the dashboard area is ticking or clicking. Depending on whether it is an aftermarket or OEM product, the cost of a new replacement component can range from $20 - $35. The cost of the replacement job from the dealer or an auto service shop ranges from $250 to $300, including parts and labor.