Starting Air Flow Control At Low Heater FULID Temperature
WARNING: This page is about a different car, the 2011 Nissan Leaf. However, it is still accessible from the selected car via links, so may be relevant.
When blower fan motor starts, the A/C auto amp. suspends blower motor activation for a maximum of 150 seconds, according to the target air mix door position, to prevent cold air from being discharged. After this, voltage applied to power transistor gate is increased gradually, and the blower fan motor starts.