To prevent overheating, which maintenance step should be performed during operation?

• A. Keep radiator blocked to maintain temperature.
• B. Keep the radiator and condenser clean.
• C. Operate with coolant low.
• D. Disable cooling fan during full load.

Answer: (C)

Preventing overheating during operation hinges on the cooling system being able to remove heat effectively. The radiator and condenser must stay clean so air can flow through them and carry heat away from the coolant. Dirt or debris on these surfaces acts like insulation, reducing heat transfer and letting engine temperature rise. Keeping the cooling surfaces free of buildup ensures the engine stays within normal temperatures. Also important is keeping the coolant at the proper level and the cooling fan and other cooling components functioning. Blocked airflow, low coolant, or a non-working fan all diminish cooling capacity and can lead to overheating.