Yes, you can use an oven to heat an aluminum coil, but with caution. Aluminum has a high melting point and can withstand high temperatures, making it suitable for heating in an oven. However, it's crucial to ensure that the coil is clean and free of any non-stick coatings or residues that could produce toxic fumes when heated. Additionally, monitor the temperature and duration of heating to avoid overheating, which might cause the coil to warp or degrade. Always follow safety guidelines and manufacturer's instructions for your specific oven and aluminum coil.