The end-of-cycle signal might not be working because it has been inadvertently reset. According to General Electric, most dryers have one of three end-of-cycle styles. While you cannot adjust the fixed style, you can switch the signal on or off on the deluxe style. The variable style includes the option to turn the signal on or off and also adjust the tone and volume. If you have inadvertently switched the signal off or set it to a low audio level, you won't hear the end-of-cycle buzz.
A defective buzzer might be the reason the end-of-cycle signal is not producing an audible sound. The buzzer is the actual alarm that sounds when the dryer cycle is over. The buzzer can be faulty or worn, it might be loose or the wires connecting it might not be firmly attached. Any of these issues will prevent the buzzer from sounding.
The end-of-cycle signal might not be producing audible sounds because of a timer malfunction. The timer directs the functions of each cycle of the dryer; it controls the length of time that electricity is routed to each area. If the timer is malfunctioning, even though the cycle is over, the timer will not relay this message to the end of cycle buzzer.
An issue with the dryer’s selector switch can prevent the end-of-cycle signal from activating. Although most of the dryer’s functions are controlled by the timer, the selector switches and knobs on the control panel choose the desired actions. If the selector switch or knob is sticking, malfunctioning or wearing out, even if you have chosen to active the end of the cycle signal, it might not recognize this selection.