Blend Air Door

CIRCUIT OPERATION
Operation of the blend air door is controlled by the HVAC control. Circuit C33 from the control supplies power to the blend air door motor. The C34 circuit is the ground path back to the control.

Depending on mode of operation the power and ground for the C33 and C34 is reversed.

The HVAC control also monitors the position of the door through a sensor. Circuit C26 is the 5 Volt feed from the control to the sensor. This circuit is spliced and supplies Voltage to the other sensors.

The C36 circuit is the sensor feedback to the HVAC control.
Circuit C57 is used to supply a common ground path for the sensor back to the control. This circuit is spliced and provides a ground path for the other sensors.