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What Causes the Radiator Fan of Audi A6L to Stop Working?

1 Answers

KaydenFitz

07/30/25 3:36am

Common causes of failure include damage or poor performance of the cooling fan control module, blown fuse S42, short circuit in the cooling fan motor, etc. Cause Analysis: The cooling fan control system of this vehicle is relatively advanced, eliminating the relay and using the cooling fan control module to directly control the cooling fan motor, allowing continuous adjustment of the fan speed. Apart from the cooling fan motor, components connected to the cooling fan control module include the cooling fan thermal switch, refrigerant pressure switch, coolant follow-up pump, fuse S42, and fuse S142. Pay attention to inspecting these components during maintenance. Solution: The cooling fan control system of the Audi A6 has a high failure rate. Common causes of failure include damage or poor performance of the cooling fan control module, blown fuse S42, and short circuit in the cooling fan motor. It is important to note that the cooling fan motor can still operate after a short circuit, but fuse S42 will blow due to excessive operating current. Therefore, when fuse S42 blows, both fuse S42 (located inside the lower panel on the left side of the dashboard) and the cooling fan should be replaced to completely resolve the issue.

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