Carrier and knob stop encoder assembly

A selector switch assembly for a multiple function control of at least one vehicle accessory comprising:

• a rotary switch having a body portion and a shaft having a rotary axis and extending from the body portion, the shaft terminating at a distal end;
• a knob having an internal receptacle for receiving the distal end of the shaft, the knob having at least one rib;
• a carrier having an opening for receiving the shaft that passes through the carrier, the carrier being assembled to the shaft between the body portion of the rotary switch and the knob, the carrier having at least one spring and at least one ball contained in a cavity formed in the carrier, wherein the spring biases the ball urging the ball to be extended radially outwardly;
• a spring clip secured to the knob connects the knob to the shaft and exerts a biasing force on the carrier against the body of the rotary switch;
• and
• a face plate defining a cavity for enclosing the rotary switch and in which a circuit board is secured, the circuit board being contained in the cavity by a backing board, the face plate having at least two end stops formed at circumferentially spaced locations on the face plate that are engaged by the rib to provide positive stops for limiting rotation of the knob in both the clockwise and counterclockwise directions, the face plate having a set of circumferentially arranged detents that are engaged by the ball to provide intermediate position stops for the knob.