It sounds like there may be an issue with the temperature control or the switch for the burner element on your electric stove. While I'm not an appliance repair expert, I can offer some general advice on what might be causing this problem and potential solutions:
Control Knob or Switch: The control knob or switch for the problematic burner may be malfunctioning. It could be stuck or damaged, causing it to get stuck in the "high" position. If this is the case, you may need to replace the control knob or switch.
Infinite Switch: Electric stoves often use infinite switches to control the temperature of the burners. An infinite switch regulates the power going to the burner to adjust the temperature. If the switch is faulty, it may not be cycling correctly between the different temperature settings. In this case, you would need to replace the infinite switch.
Heating Element: It's also possible that the heating element itself is faulty. If there is an issue with the element, it may not respond correctly to changes in the control settings, causing it to remain at the high temperature. Replacing the heating element might be necessary if this is the problem.
As with any electrical appliance, it's crucial to prioritize safety. If you're not familiar with appliance repair and troubleshooting, it's best to contact a qualified appliance repair technician to diagnose and fix the issue. They will have the necessary expertise and tools to safely assess and repair the stove.
Before calling a technician, you can check the stove's user manual for any troubleshooting tips or specific information related to the issue. Additionally, make sure to turn off the power to the stove at the circuit breaker before attempting any inspection or repair. Electrical appliances can be dangerous when mishandled, so it's best to leave the task to professionals if you're unsure about what to do.