What may happen if the alcohol evaporator is not kept filled with alcohol in an air brake system?

In an air brake system, the alcohol evaporator plays a crucial role in preventing moisture accumulation within the system. If the alcohol evaporator is not adequately filled with alcohol, there's a significant risk that moisture in the air can freeze in cold weather conditions. This freeze can lead to the formation of ice in the air storage tanks, which can block the air lines and ultimately result in brake failure. When air cannot flow freely due to this blockage, the brakes may become inoperative or less effective, posing serious safety risks. Therefore, it's essential to maintain the alcohol level in the evaporator to ensure optimal performance of the braking system, particularly in colder climates.