If the water tank is not cleaned regularly, the following hazards may arise:

1. Causes rust and scale buildup, significantly reducing the cooling system's heat dissipation, leading to the water tank boiling over and, in severe cases, damaging the engine.

2. Neglecting to clean the water tank for extended periods can lead to the accumulation of debris such as leaves, insects, and cotton fibers. This can cause various issues, including poor vehicle cooling, increased engine temperature, and inefficient air conditioning.

3. Excessive water temperatures can lead to overly high internal pressure in the cooling system, which, in severe cases, may result in burst pipes.

Therefore, it is necessary to regularly clean the water tank and pay attention to its maintenance to prevent contact with any acids, alkalis, or other corrosive substances. Avoid using hard water without softening treatment to prevent internal clogging of the tank and the formation of scale. During the installation process, also avoid damaging the radiator fins and scratching the tank to ensure its heat dissipation capability and seal integrity.

Recommend selecting a qualified cleaning team for the operation, and ensure the cleaning process complies with relevant regulations and standards. Additionally, maintain water quality during the cleaning process to prevent environmental pollution.