There are several potential reasons why an oven might stop working and refuse to turn on again, even after it has cooled down completely. Some common causes include:
Power supply issues: One of the most common reasons for an oven not turning on is a problem with the power supply. It could be a blown fuse or a tripped circuit breaker that cut off power to the oven. In this case, you should check the circuit breaker panel or fuse box and reset or replace the fuse or breaker as needed.
Faulty heating element: The heating element is responsible for generating the heat inside the oven. If it becomes damaged or fails, the oven may not heat up properly or may not turn on at all. In this case, the heating element may need to be replaced.
Broken thermostat: The thermostat regulates the oven's temperature by turning the heating element on and off as needed. If the thermostat is malfunctioning, it may prevent the oven from turning on. Replacing a faulty thermostat should fix the issue.
Defective control board: The control board, also known as the electronic oven control (EOC) or clock, is responsible for managing various functions of the oven. If the control board becomes faulty or damaged, it may prevent the oven from turning on. Replacing the control board might be necessary.
Wiring problems: Electrical wiring within the oven can get damaged over time due to wear and tear or pest infestation, leading to a lack of power flow and preventing the oven from turning on. Professional inspection and rewiring may be needed to resolve this issue.
Safety features activation: Some ovens have safety features, such as thermal fuses, that automatically shut off the oven if it detects excessive heat. If a safety feature is activated, the oven won't turn on until the issue causing the excessive heat is resolved and the safety feature is reset.
Control lock engaged: Many ovens have a control lock feature that prevents accidental use or tampering. If the control lock is enabled, the oven won't turn on until the lock is disabled. Check your oven's user manual to learn how to activate or deactivate the control lock.
If you're not comfortable or experienced in troubleshooting or repairing appliances, it's best to contact a professional oven technician or an authorized service center to diagnose and fix the issue. They have the expertise and tools necessary to identify and resolve the problem safely.