EBF62174908 Range Surface Burner Infinite Switch – The complete fix for an LG electric range or cooktop burner that won't heat, won't turn off, only works on high, has no temperature control, heats intermittently, or has a burner indicator light that doesn't work. The infinite switch (also called surface burner switch, rotary switch, or simmerstat) is the component behind the control knob that regulates heat to the burner element. It works by cycling power on and off at varying intervals — when you turn the knob higher, the element stays on longer between cycles, producing more heat. When the infinite switch fails — due to worn contacts, a broken bimetal mechanism, burned terminals, or internal component failure — the burner may not heat at all, stay on constantly (won't turn off), only work at full power regardless of knob position, produce inconsistent heat, or the indicator light may not illuminate. If one burner isn't working properly but the element itself tests good, the infinite switch is the likely cause. This genuine OEM LG part directly replaces PER001-11LGS, 20041113, EBF62174905, and EBF62174903. Fits LG and Kenmore Elite electric ranges and cooktops. Moderate 30–45 minute DIY repair that restores precise burner temperature control.