Fans & Fan Parts
About Fans & Fan Parts
A radiator fan pulls air through the radiator when the machine is moving too slowly for natural airflow to cool it. On a UTV or ATV that means slow trail work, mud, sand, rock crawling and long idling. This category lists cooling fans and auxiliary fan kits, including a kit for the Honda Pioneer 1000, from DEI and Moose Offroad.
Decide whether you are replacing a failed fan or adding airflow. A replacement fan restores the original cooling, and an auxiliary fan kit adds a fan to the radiator. Check the fan size and mounting against your machine, and read the listing for how the fan is wired. Many fans are switched on by a temperature sensor, so if a fan does not run, check the fuse, the connector and the sensor before replacing the fan itself.
This is a small category, so pick your machine in the Ride Finder at the top of the page and compare the fitment in the listing. For the parts that control the fan and the rest of the system, see Temperature Sensors & Switches, Thermostats & Housings and Water Pumps, all part of Engine Cooling.
FAQs on radiator fans
Why is my radiator fan not turning on?
Common causes are a blown fuse, a loose or corroded connector, a bad temperature sensor or switch, or a failed fan motor. Check the fuse and connector first, then the sensor, and test the fan by applying power directly if the manual allows.
What does an auxiliary fan kit do?
An auxiliary fan kit adds an extra fan to the radiator to move more air through it. It is meant for slow riding and hot conditions where airflow is low. The listing tells you which machine it fits and how it is wired.
How can I tell if the fan is working properly?
Warm up the engine and watch for the fan to come on at the temperature in your manual, and to switch off after it cools. Keep hands, tools and loose clothing away from the blades, since the fan can start without warning.
Can mud affect how well the cooling fan works?
Yes. Mud packed into the radiator fins blocks airflow, so the fan cannot cool the engine properly even if it runs. Clean the radiator after muddy rides, using low water pressure and working from the back so you do not bend the fins.
