Why does the car's air conditioning still make noise after the engine is turned off?

1 Answers
DonovanDella
07/30/25 2:48am
Car air conditioning still making noise after the engine is turned off is due to the coolant not circulating, which is a normal phenomenon. Here is an introduction about coolant-related content: 1. Coolant replacement: It is recommended to have it replaced by professional maintenance personnel at the after-sales service. 2. Function of the coolant temperature sensor: The coolant temperature sensor is used to detect the temperature of the engine coolant and send this signal to the engine's electronic control unit, which then adjusts the injection time, ignition timing, and idle speed accordingly. 3. Control signal: It can also serve as a control signal for other systems.
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