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What is the purpose of unplugging heater hose in a car?

Unplugging a heater hose in a car is not a recommended procedure and can have several negative effects:

coolant, which can lead to overheating and potentially damage the engine.

coolant temperature sensor, resulting in incorrect temperature readings and potentially causing the engine to run at higher temperatures.

coolant circulation throughout the engine, which can lead to uneven temperatures and potential damage.

Additionally, unplugging the heater hose can result in a loss of cabin heat, making it uncomfortable for passengers and potentially unsafe in cold weather conditions.

It's important to consult a qualified mechanic or refer to the vehicle's manual before performing any modifications or repairs to the cooling system.