Mercedes-Benz W210 Engine fan warning and cooling fan not running
E200 CDIE220 CDIE270 CDI
What causes the W210 Engine fan - Visit workshop warning?
Causes have included a blown 7.5 A engine management fuse, a faulty intake air temperature sensor, seized fan bearings or a faulty control unit. Read the fault codes first before replacing parts.
Where is the fan control unit and what happens if the control is missing?
The control unit is at the front on the driver's side, inside the bumper above the fog light. If the fan does not receive a control signal, it runs at full speed. The fan itself should not prevent driving.
How do I find out whether the fault is in the fan or in the control?
If the fan runs when you give it 12 V directly, the motor is fine and the fault is in the control: the control unit, its wiring or the fuse. If it does not run, the fan bearings may be dry or seized.
Related articles
Mercedes-Benz W210 ABS, ESP and BAS warning lights onMercedes-Benz W210 A/C compressor does not engageMercedes-Benz W210 A/C refrigerant leaks and dryerMercedes-Benz W210 automatic transmission fluid changeMercedes-Benz W210 automatic transmission fluid levelMercedes-Benz W210 BAS and ASR light and brake light switchMercedes-Benz W210 boost pressure missing or turbo whiningMercedes-Benz W210 cabin does not warm up or warms up slowly