What is the reason for one fan spinning and the other not spinning in the eighth-generation Accord?
2 Answers
In the eighth-generation Accord, one fan spinning while the other does not could be due to the coolant temperature not reaching the required level, a faulty relay, or an issue with the temperature control switch. Here are the detailed explanations: Coolant temperature not reaching the required level: Most modern car radiator fans operate using electronic temperature control, meaning the fan will only start spinning normally when the coolant inside the car reaches the specified temperature. If the temperature is too low, the radiator fan will not spin. Therefore, if the radiator fan is not spinning, the first thing to check is whether the coolant temperature has reached the required level. Faulty relay: If the coolant temperature is adequate but the radiator fan still does not work, the issue might be with the fan's relay. A faulty relay can prevent the radiator fan from operating. Issue with the temperature control switch: If the above two aspects are not the problem, then the temperature control switch should be inspected. Sometimes, faults in this component can also affect the operation of the radiator fan, so it is important to check this as well.
I've been driving for over a decade and encountered similar issues. When one of the two fans on an eighth-generation Accord isn't spinning while the other is, it's likely due to a faulty fan motor—aging can cause it to stop working, or a loose wire connection might be interrupting the current. Start with a simple check: pop the hood and observe when the engine gets warmer. If only one fan spins at high speed, that fan might be broken. Next, test the fuses—locate the fuse box in the engine compartment, and if the fuse corresponding to the fan is blown, replace it. It could also be that the cooling demand isn't high enough, so the system only runs one fan to save power. But if the engine temperature rises quickly or the AC isn't cooling well, be cautious. Try troubleshooting first, like cleaning dust around the fan to see if it helps. If that doesn't work, visit a repair shop to diagnose the circuit or replace parts—don't wait until overheating causes major engine damage.