What problems are associated with electrically heated windshields?

Electrically heated windshields can experience several problems, making the understanding of these issues crucial for maintenance and safety. Delamination and arcing are significant concerns. Delamination occurs when the layers of the windshield start to separate, which can affect visibility and structural integrity. Arcing refers to the electrical sparks that can form if there are faults in the heating element, which can also lead to further damage or potential hazards.

Additionally, scratches and discoloration are common issues as well. The heating elements embedded within the glass can be susceptible to scratches during routine cleaning or due to normal wear and tear. Discoloration may occur from prolonged exposure to high temperatures or UV light, impacting the clarity and aesthetics of the windshield.

Therefore, recognizing that both delamination and arcing, along with scratches and discoloration, are associated with electrically heated windshields is essential for ensuring their proper maintenance and function. This comprehensive understanding is reflected in the correct answer, which encompasses all these issues. Increased thermal efficiency, while a beneficial aspect of electrically heated windshields, does not relate to the problems encountered.