"OF" is one of the common error codes of rice cookers, which means that there is a fault in the cooking process. When the rice cooker detects some problems, it will automatically stop heating and display the error code "OF". The following are several reasons for the "OF" in rice cookers:

1. Temperature sensor failure: The temperature sensor of the rice cooker is an important part to monitor the water temperature during cooking. When the temperature sensor is damaged, the rice cooker does not know when to stop cooking and will display "OF".

2. Water level sensor failure: If there is something wrong with the water level sensor, the rice cooker will misjudge the water level and generate an "OF" error code.

3. Steam hole blockage: rice cookers are generally equipped with steam holes to ensure the normal cooking process. If these holes are blocked or blocked, the steam can't flow out smoothly, resulting in the rice can't be cooked, and the rice cooker stops working and displays "OF".

4. The insulation cover is not closed normally: the insulation cover of the rice cooker must be completely closed to ensure the success of cooking. If the lid is not closed correctly, the rice cooker will stop heating and display an "OF" error code.

5. Circuit board problem: The circuit board is one of the core components of the rice cooker. If the circuit board fails, the rice cooker may not work normally and an "OF" error code will be displayed.

When the "OF" error code appears in the rice cooker, it is recommended to check and repair it in time. Keeping the rice cooker clean and in normal use can effectively prevent the occurrence OF "of" errors.