What does the REST button on Volkswagen's air conditioning mean?
3 Answers
Volkswagen's REST button on the air conditioning refers to the residual heat function. Here are some relevant details about REST: 1. Introduction: The REST button is essentially a residual heat function that utilizes the engine's remaining heat to continue providing warm air inside the car for up to half an hour after the engine is turned off, before automatically shutting off. 2. Usage: This feature is particularly suitable for short-term parking during winter, helping to maintain the interior temperature and prevent it from dropping rapidly. When restarting the vehicle, there's no need to turn on the air conditioning system to reheat the interior. To activate it, simply press the "REST" residual heat control button on the center console after turning off the vehicle.
I often use the REST function on my Volkswagen's air conditioning while driving, which actually stands for "Residual Heat Utilization." Simply put, when you park and turn off the engine, pressing the REST button allows the system to automatically use the residual heat from the engine to continue blowing warm air into the car. Especially in winter, when the engine is still warm after shutting down, this feature can maintain the cabin temperature for about 20 to 30 minutes, preventing the car from turning into an icebox when you return. I learned this from a friend in the north and use it every time I go grocery shopping or run quick errands—it’s super convenient and energy-efficient, saving fuel and reducing emissions. Remember, it only works in cold weather when the engine has just been turned off; it’s useless in summer. Operation is foolproof: just press the button after parking and walk away. Volkswagen’s design is thoughtful, recycling waste heat in an eco-friendly and practical way—far better than restarting the engine to run the AC.
The REST marking on the air conditioning panel means that residual heat can still be used for heating after the engine is turned off. This is a German abbreviation, and Volkswagen uses this feature for heat recovery, working similarly to waste heat recovery in the cooling system. When you've just parked and the engine still has temperature, pressing it will automatically activate the fan to maintain warm air output for about 20 minutes. As a car enthusiast, I think this design reflects intelligent engineering, helping you save electricity and fuel while enhancing comfort. Most standard models have this feature, and it's more common in versions with automatic climate control. Note that it doesn't work after a cold engine start and is only suitable for short-term use—don't expect it to provide cooling. I've noticed similar technologies while working on modifications, and they are indeed efficient. Using it wisely can also reduce your carbon footprint.
