Where is the fan control module located in the old Jetta?

2 Answers
JayceDella
07/28/25 4:37pm
The fan control module in the old Jetta is located on the fan itself. Additional information: 1. How the electric fan works: The electric fan operates based on a thermostat. When the coolant temperature rises to the upper limit, the thermostat activates the power supply, causing the fan to start working. Once the temperature drops to the lower limit, the thermostat cuts off the power, and the fan stops. 2. Reasons for electric fan failure: Poor motor lubrication can prevent the fan from rotating, as inadequate lubrication hinders the motor's ability to drive the fan; motor overheating can reduce its load-bearing capacity and effective power output, making it unable to drive the load; a decrease in the starting capacitor's capacity reduces the motor's starting torque, preventing it from driving the load; prolonged motor usage can also lead to failure.
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MacXavier
08/11/25 11:25pm
I'm a veteran driver with my old Sagitar, having driven for almost 15 years. The fan control module is usually located at the rear of the engine bay, near the firewall, specifically on the inner wall of the engine compartment in front of the driver's seat. Last time I encountered a non-working fan issue, I popped the hood and found a small black box to the right or above the battery, connected to the fan's wiring harness. Remember to disconnect the negative battery terminal first when inspecting it, and use a flashlight for better visibility. The module is secured with screws or clips, making removal and installation straightforward, but be careful not to hurt your hands. A faulty fan control module can lead to poor cooling, making the engine prone to overheating, especially during summer traffic jams—keep an eye on the temperature gauge. Regularly cleaning radiator dust is recommended to extend the module's lifespan and avoid trouble. If the fan makes unusual noises or stops, pull over immediately and don't push your luck.
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