**12 volt ONLY 110/115/220 volt such as in a house or generator will damage the unit**
Includes the switch/circuit board
Knob Not included
Be sure to remove the set screw before trying to replace switch.
1) remove the small set screw in the knob, if you do not remove this you will damage the circuit board. Screws is located across from the white line on the turn knob.
2) remove the small nut holding the switch/circuit board in place. Do not turn the blue knob, be sure to remove the nut. The switch/circuit board will then be free from the back side. Disconnect the wires and be sure to reconnect matching wires on the new switch.