How do you increase a radiator fan speed?

To increase a radiator fan speed, you can adjust the fan's settings through the vehicle's climate control system, if it has variable speed options. If the fan is controlled by a relay or resistor, replacing it with a higher capacity component may enhance performance. Additionally, ensuring the cooling system is functioning properly and removing any obstructions or debris around the fan can help optimize its speed. In some cases, an aftermarket fan controller can be installed for more precise speed adjustments.