What does the REST function mean in Volkswagen car air conditioning?

[LaIsaac]

REST in Volkswagen car air conditioning refers to the residual heat utilization function. Considerate Service: It can continue to provide warm air for a period of time after the engine is turned off, and then automatically shuts down. This is a kind of insulation for the car interior. When the vehicle is started again, there is no need to turn on the air conditioning system, just heat the interior temperature. Therefore, using the heater in winter is more fuel-efficient than using the air conditioner in summer, which can be considered as a considerate service for car owners. Winter Air Conditioning Tips: The working principle of the air conditioner in winter is different from that in summer. Most of the warm air from the air conditioner in winter is generated by the excess heat of the engine, which is blown into the car by the blower. It is recommended to turn on the air conditioner only when the engine reaches a good temperature standard, i.e., between 80 and 90.