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Where is the electronic fan thermostat switch of the Passat?

2 Answers

LunaLynn

09/07/25 8:26am

The thermostat switch of the Passat is located on the lower radiator hose. Introduction to the thermostat switch: According to the temperature changes in the working environment, physical deformation occurs inside the switch, thereby producing certain special effects and generating a series of automatic control components that perform conduction or disconnection actions. These are called thermostat switches, also known as temperature protectors or temperature controllers, referred to as thermostats. Alternatively, the temperature is transmitted to the temperature controller through the temperature protector, and the temperature controller issues a switch command to control the operation of the equipment to achieve the desired temperature and energy-saving effect. Function of the thermostat switch: The thermostat controls the operation of the electronic fan, turning it on when the temperature reaches a certain level and stopping it after cooling. The working principle of the Volkswagen Passat electronic fan is that the car's electronic fan is controlled by the thermostat. When the water temperature rises to the upper limit, the thermostat connects the power supply, and the fan starts working. When the water temperature drops to the lower limit, the thermostat turns off the power supply, and the fan stops working.

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DelDaniella

09/19/25 7:28am

I've driven a Passat for over ten years and I'm quite familiar with this temperature control switch. It's located near the radiator at the front of the car, usually hidden behind the front bumper or at the top of the radiator. That little device senses the engine temperature and triggers the fan to start cooling when it gets hot. The location isn't hidden but requires some experience to find. For example, my colleague's 2018 model has the switch on the radiator bracket, and you can easily feel the cable connection with a light touch. Safety first—don't try to touch it yourself. If you get an electric shock or damage the wiring, it could be a big hassle. Just go to a repair shop for a check-up—it saves both money and trouble.

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