Procedure. BMW E90 models have an advanced radiator fan control, which uses a Pulse-width-modulated or PWM signal to regulate the fan speed. This allows infinite speed regulation, unlike hi-low speed on older cars, and helps increase efficiency and fuel economy. All early models with gasoline engines have a high radiator fan failure rate.
Fan blower motor stopped working. I started my car this morning, and hit the defroster button The orange light speed indicator lines on the dash showed the fan running at the highest setting, but no motor noise, and no air. I tried all of the settings, including the foot, face and upper dash settings, and still no fan.
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bmw e90 heater blower not working
