HVAC Blower Motor & Circuit

HVAC Blower Motor & Circuit Control

LINKS:
http://www.autodiagnosticsandpublishing.com/TransTS.html
http://www.autodiagnosticsandpublishing.com/CBT_Auto_Traning.htm

The automotive HVAC Blower Motor is in charge of pushing cabin air passed the evaporator, which in turns cools it. The colder evaporator doesn't really cool the air, but takes heat away from it. As important as the blower motor is, the circuitry that controls it is even more important.

In the past, an air stream resistor was used to give the blower motor it's 3 speeds, or low, medium, and high. However, nowadays it is all done electronically, and the electronic controls vary in many different ways.

The original resistor based blower motor control, was a simple resistor winding arrangement, and was cooled by the air conditioning air stream. This simple arrangement served its purpose well, but had no intelligence whatsoever.

So, what do we mean by intelligence?

Modern automotive climate control systems are completely integrated to the engine operation. By this we mean that the ...

Get the whole story right here in this video. Enjoy...

Видео HVAC Blower Motor & Circuit канала ADPTraining