Blower Motor Resistor: Description and Operation

BLOWER MOTOR RESISTOR DESCRIPTION

The following components, when used in combination, determine the blower speed:
^ The blower resistor.
^ The blower switch.

The blower resistor consists of 3 resistors located in the same housing.

With the blower switch in LO, the following actions occur:
^ The blower circuit uses all 3 resistors.
^ The blower motor runs at the lowest speed.

With the blower switch in M1, the following actions occur:
^ Two of the resistors are in use.
^ The blower motor runs faster.

With the blower switch in M2, the following actions occur:
^ Only one of the resistors is in use.
^ The blower motor runs even faster.

With the blower switch in HI, the following actions occur:
^ None of the resistors are in use.
^ The blower motor runs at maximum speed.