Description And Operation

The blend door actuator is a direct current motor controlled at 12 V, but usually operates between 10 V and 16 V.

The specific feature of the potentiometer is that it is linear. The potentiometer receives a 5 V power supply at pin 3 and receives the ground at pin 1. The signal of the potentiometer exits pin 2 and is compared with the supply of the Heating, Ventilation, and Air Conditioning (HVAC) module. This is not an absolute value, it is a percentage of the power supply. Therefore this measurement is not linked to the level of the battery. The value of the potentiometer resistance must be about 4.7 kilohms.