What is the reason for the intermittent illumination of the temperature gauge?

[CharlesLynn]

The reason for the intermittent illumination of the temperature gauge is a lack of coolant. A slightly low coolant level can trigger temporary warnings. Prolonged high temperatures can reduce the lubrication effectiveness of the engine oil, leading to wear and tear of internal engine components. If the red light comes on, do not continue driving. When the temperature warning light illuminates, you should stop the vehicle and check—note that you should stop but not turn off the engine. Park the vehicle in a safe area and keep the engine running at idle speed to allow heat dissipation by opening the hood. If you see steam rising from the hood, observe first and avoid opening it hastily to prevent burns. After parking, first check if the coolant level in the auxiliary tank is too low. If the coolant level is below the 'min' line, add coolant. If coolant is not available, you can temporarily use mineral water as a substitute, but remember to replace it with new coolant afterward.