Manual:HUMMER Hummer H3 Base 2010Page:23313 / 37523



Air Speed — 2010 Hummer H3 Base, Automatic Service Manual

Air Speed

The HVAC control assembly applies a ground to the blower motor control circuit that corresponds to the selected blower speed. The resistors and the blower motor are in a series circuit. The following list represents the number of resistors in series with the blower motor per particular speed request:

  • Low speed, 3 resistors
  • Medium 1 speed, 2 resistors
  • Medium 2 speed, 1 resistors

When the operator requests High speed, the HVAC control assembly activates a relay which applies direct ground to the blower motor.