GE Part #wb08T10039, Cooktop Lockout Buzzer | 6.00 x 6.00 x 0.80. This lockout buzzer (part number WB08T10039) is for cooktops. Lockout buzzer WB08T10039 gives an audible signal to alert you when the cooktop lockout feature is activated. Disconnect power to the cooktop before installing this part. Wear work gloves ... - GE Part #wb08T10039, Cooktop Lockout Buzzer | 6.00 x 6.00 x 0.80.