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Why do the heater blower stays on when you turn the engine off?
Wiki User
∙ 12y ago
What you are likely hearing is the electric fan that cools the radiator and Air Conditioning condenser. This is likely remaining on to remove excess heat from the engine coolant to prevent a boil over after shutting down. When the engine is shut down heat continues to be transferred into the coolant for a period of time.
You should also notice that when the Air Conditioner is turned on in the car that the radiator cooling fan will remain on continuously. This is necessary to cool the heat exchanger(condenser coils) that remove heat from the freon in Air Conditioning system. When the Air Conditioning is not on the cooling fan will activate only when necessary, which is when the engine coolant rises above a temperature that is too hot to cool the engine.
Wiki User
∙ 12y ago
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