What to Do When the Tiguan's Fan Keeps Running?

[LeJayce]

Tiguan fan continuous operation solutions are as follows: 1. Insufficient coolant causing engine overheating, leading to continuous operation of the electric fan. The solution is to add antifreeze. 2. Radiator leakage causing engine overheating, leading to continuous operation of the electric fan. The solution is to replace or repair the radiator. 3. Thermostat failure, preventing water from being sent to the radiator even when the temperature reaches the baseline, causing engine overheating and continuous operation of the electric fan. The solution is to replace the thermostat. Methods to determine the condition of the electric fan are as follows: 1. Visual Inspection: Observe the fan motor's ventilation port for any signs of burnt coils. If there are burnt marks, it indicates the fan motor coils are burnt and cannot be used. 2. Smell Test: Use your nose to detect any burnt smell from the fan motor, such as burnt coil smell, burnt plastic smell (capacitor), or burnt wire smell (wiring). If any burnt smell is detected, replace the fan motor, wiring, and capacitor. 3. Touch Test: Manually check the fan's operation by turning the shaft. If it feels stiff or not smooth, it indicates lack of lubrication in the internal bearings or rotor scraping. If scraping is found, lubricate and clean, and replace the bearings on both sides to eliminate the scraping. Check the surface temperature; if it rises too quickly or too high, it indicates a short circuit in the fan motor, and the fan motor needs to be replaced.