Which problem is often the cause of a solenoid not functioning properly?

• A. Corrosion on contacts
• B. Burnt out solenoid
• C. Loose mounting screws
• D. Incorrect voltage supply

Answer: (B)

A burnt-out solenoid is indeed a common reason for a solenoid not functioning properly. When a solenoid burns out, it loses its ability to create the electromagnetic field necessary for its operation, rendering it unable to actuate the valve or mechanism it controls. This failure can stem from extended use, overheating, or electrical overload, leading to a break in the coil wire or short circuits.

While the other factors like corrosion on contacts, loose mounting screws, and incorrect voltage supply can certainly impede solenoid performance, they may often be remedied without replacing the solenoid. In contrast, a burnt-out solenoid typically requires a complete replacement, making it a definitive cause of failure.