It is generally recommended to turn off your car's air conditioner before you start or stop the engine. Here's why:
Starting the engine: When you start your car's engine, it requires a burst of power from the battery to crank the engine and get it running. Turning off the air conditioner before starting the engine reduces the load on the battery, which can help prolong its lifespan.
Stopping the engine: When you turn off the engine, the air conditioning system continues to run for a brief period, using the remaining power from the battery. Turning off the air conditioner before shutting down the engine helps save battery power, ensuring that the car starts smoothly the next time you need it.
Additionally, if you consistently leave the air conditioner on when you start or stop the engine, it may put extra strain on the battery and other electrical components, potentially leading to premature wear and tear.
To maintain your car's battery and electrical system's health, make it a habit to switch off the air conditioner before starting the engine and turn it off a few moments before turning off the engine. This practice can help ensure a longer lifespan for your car's battery and prevent unnecessary strain on the electrical system.