Does the Air Conditioning Also Need to Stop During Engine Start-Stop?

[McAaliyah]

During engine start-stop, the air conditioning also needs to stop working, as the air conditioning cannot be used when the engine start-stop technology is active. Below is additional information: Air Conditioning Compressor: The air conditioning compressor operates only when the engine is running. If the engine start-stop function is frequently activated, the lifespan and cooling efficiency of the air conditioning compressor may decrease. Engine start-stop technology automatically shuts off the engine when the vehicle comes to a temporary stop during driving. When it's time to move again, the system automatically restarts the engine. Engine Start-Stop Technology: If the vehicle is driving on a steep slope, it is advisable to avoid using the automatic start-stop function. Although the start-stop duration is brief, the engine's start-stop on a slope might lead to insufficient brake assistance. Turning Off the Automatic Start-Stop Function: During extremely hot weather when the air conditioning is running at full capacity, it is best to turn off the automatic start-stop function. This is because the air conditioning requires significant power consumption, and the vehicle's electrical system might not provide enough power to operate the air conditioning when the engine is off, potentially causing discomfort for passengers.

[DeBethany]

When the start-stop system is active, the air conditioning is indeed affected, but it usually doesn't stop completely. After years of driving, I've noticed that when the engine automatically shuts off to save fuel, the air conditioning compressor temporarily stops because it's an engine-driven component. The fan system generally continues to operate, maintaining airflow to prevent rapid temperature changes inside the car. Some models are equipped with smart features, such as battery assistance or independent fans, which can slightly mitigate the reduction in cooling effect. On hot summer or winter days, this can cause a temporary weakening of the cooling or heating, leading to discomfort. To address this, I often recommend that drivers adjust the air conditioning temperature settings in advance or turn off the start-stop system button to avoid the initial impact. The key is to understand your car's configuration and check the manual for any special settings, which can help reduce unnecessary frustration and ensure driving comfort.

[OSienna]

As a driver, I've experienced the air conditioning briefly weakening when the start-stop system is active. The start-stop feature is designed to save fuel and be eco-friendly by automatically shutting off the engine, but the air conditioning compressor relies on the engine belt drive, so it stops working when the engine is off. Most vehicles keep the blower running, so there's still airflow from the vents, but the cooling or heating capacity drops. In traffic jams or at red lights, I often notice the cabin temperature rising quickly, especially when driving in tropical regions. To avoid discomfort, I pre-cool or pre-heat the car before starting and use the steering wheel button to disable the start-stop system to ensure continuous air conditioning effectiveness. Don't worry—this isn't a malfunction. Regular maintenance checks on the battery and compressor wiring can reduce the frequency of such issues.

[CatherineRose]

In the start-stop system, the air conditioning is not completely shut down but partially suspends its driving components. When the engine is turned off, the compressor loses power and stops cooling or heating, but the fan continues to blow air as usual. Although this mechanism temporarily reduces comfort, it contributes to fuel savings. Accepting it as a small sacrifice for environmental protection helps reduce exhaust emissions.