The heat switch will illuminate when it is activated and will turn on the heater. NOTE: if the green, two-circuit indicator light is not turned on, you may
have both power cords on the same circuit and this can trip the circuit breaker in the wall.
GREEN, TWO CIRCUIT INDICATOR (5):
This light will automatically turn on when you have plugged the two power cords into separate circuits. If this light does not turn on, try other outlets
with one of the cords until the light does turn on. NOTE: all systems in the machine will operate if this light does not turn on, but you may trip a circuit