Blower Control

IHKA E38 BLOWER CONTROL







While the basic operating theory for E38 blower control is similar to that of earlier IHKA systems, the number of components involved and their appearance is quite different:

- The control pane! and control module are combined into one unit.
- The final stage unit is mounted directly on the blower motor assembly.
- The control panel/module supplies the voltage to energize the blower relay.
- The control panel/module has separate blower speed thumbwheels for the driver and passenger.

Each of the blower thumbwheels supplies a voltage signal to a processor inside the control panel/module. The processor always runs the blower motor at the higher selected speed to ensure adequate air flow on that side of the interior.

The processor also influences face vent flap position. To achieve reduced air flow on one side of the interior, the face vent flaps of that side are partially closed.







- The final stage unit is mounted directly on the blower motor assembly, between the dual impellers.
- The E38 evaporator is coated with polyurethane, and has a plastic gauze-type screen placed against it's outlet side. These changes improve condensate drainage.