Can a fuse cause no heat?

Yes, a fuse can cause no heat if it is functioning properly and not overloaded. Fuses are designed to interrupt electrical flow when excessive current passes through them, preventing overheating. If the current remains within the fuse's rated capacity, it should operate without generating noticeable heat. However, if a fuse is damaged or faulty, it may not function correctly, potentially leading to overheating or other issues.