What is the normal RPM for a Corolla when the AC is on?
2 Answers
Corolla's normal RPM with AC on is 600-800. Car Idling: Idling is an operational state of a car where the engine runs in neutral gear. The engine speed during idling is called idle speed, which can be adjusted by modifying the throttle opening size. Idling means the engine is "producing power without doing work". Normal Car Idling: When starting the engine in parked condition, the minimum stable operating speed is called parking idle speed. For engines in good working condition, the idle speed is generally 550-800 RPM.
It is normal for the engine speed to increase when the air conditioning is turned on while driving. In my Corolla, the idle speed usually rises from around 700 rpm to about 900 rpm when the AC is on. This is mainly because the air conditioning compressor requires the engine to provide additional power to operate, so the engine automatically adjusts the speed to maintain stability. If the speed is too high, such as exceeding 1000 rpm with noticeable shaking, it could indicate compressor wear or a loose belt. If it's too low, the idle valve might be clogged. I've been driving this car for three years, and the speed always behaves this way when the AC is on during hot weather. It's more noticeable when driving in the city during summer, but the impact is minimal at highway speeds. During regular maintenance, I have the mechanic check the AC system and idle settings to ensure the coolant levels are normal and to prevent minor issues from escalating. Overall, this speed variation is similar in most Corolla models, and as long as it remains stable, it's considered normal.
