Blower switch, function - GF83.25-P-2100-02GC

Function 

Depending on the setting of the blower switch, the current is guided via sliding contacts onto a contact plate, and from there to the relevant series resistor assembly resistor for the set blower level.

On actuation of the starter, the control voltage for the blower (M2) is switched off at the control unit via terminal 15x.

Model 168 as of 1.03.01 

Blower level 4 is implemented by bridging two contact decks.

As a result of the design of the contact plate, the re-activation of

blower level 1 → blower level 2 and

blower level 2 → blower level 3

may lead to an increase in the speed of the blower motor due to the short-term bridging of two contact plates (intermediate setting).