If air in the cooling system isn’t an issue, a sticky thermostat or cooling fan may be the cause of cooling issues in your Polaris General. Your fans may not be running when they should or the fan blades might be rubbing or have something stuck on them. Another issue we’ve seen occur in a few Generals is the firmware in the ECU which limits the current is set too low. If your machine doesn’t throw any fault codes, the ECU could be where the problem lies. To test it, run your motor -- and turn the AC on if you have it. The fan should turn on at low speed and go to high speed when it reaches temp. If you splash water on the fan, it will stop because the ECU will think the fan has loaded up. You can reset it by turning the motor off and back on. Until Polaris comes up with a firmware update, you will have to just restart your machine every time you’re having cooling issues. And while we’re on the subject of cooling, many riders have reached out to us asking which type of coolant they should use. We tell them that any 50/50 mix will work, and we like using the green auto antifreeze instead of the overpriced Polaris branded coolant. So if you have any questions about the cooling system of your Polaris General, just give us a holler!