Running an oven in self-clean mode without any contents can pose several dangers and risks. Here are some potential hazards:
Fire risk: The self-clean mode uses extremely high temperatures to burn off the built-up grease, food particles, and other debris inside the oven. If the oven is empty, there is a higher risk of the heat becoming concentrated in certain areas, potentially leading to overheating, melting, or even igniting the oven components or surrounding materials.
Damage to oven components: The intense heat generated during self-clean mode can cause damage to the oven's internal components, such as heating elements, thermostat sensors, or control panels. Running the self-clean cycle without any items inside the oven can subject these components to excessive stress, potentially resulting in malfunction or permanent damage.
Release of toxic fumes: During the self-clean process, any food residue or grease inside the oven will be burned off. This can result in the release of smoke, fumes, and odors. While this is generally safe when there is food debris present, running the self-clean cycle without anything inside the oven can create a stronger concentration of fumes, potentially causing unpleasant odors or even releasing harmful gases.
Potential for carbon monoxide buildup: In rare cases, self-cleaning ovens that use gas as a fuel source may produce carbon monoxide (CO) during the self-clean cycle. If the oven is empty, there is a greater chance of incomplete combustion and the accumulation of CO. Carbon monoxide is a poisonous gas that can be harmful or even fatal if inhaled in high concentrations.
To ensure safety, it is generally recommended to follow the manufacturer's instructions and guidelines when operating an oven in self-clean mode. This typically includes removing any excessive food debris and avoiding running the self-clean cycle without any items inside the oven.