Mercedes-Benz C300 fan won't turn off after new blower failure on Mercedes-Benz C300

Some Mercedes-Benz C300 owners report experiencing issues with the blower fan not turning off after a new blower motor installation. These problems may arise if the new blower motor is not functioning correctly or is incompatible with the vehicle model. Additionally, a faulty blower resistor or relay can cause the fan to remain on when it should be off. Owners are also advised to inspect wiring connections to the blower motor, resistor, and relay, as loose or damaged connections can lead to operational issues. Malfunctions in the climate control system may further exacerbate the problem. If these issues persist, it is recommended that owners consult a qualified mechanic or technician who specializes in Mercedes-Benz vehicles for a thorough diagnosis and appropriate solutions.