* Is it working *correctly* or just working? The fan should only come on when the engine coolant temperature reaches a certain point. If it's running constantly, even when the engine is cold, there might be a problem with the temperature sensor, the fan control module, or a short circuit. Similarly, if it *doesn't* come on when the engine is hot, that's a serious issue that could lead to overheating and engine damage.
* Is it working at the correct speed? Some vehicles have multiple fan speeds. A single, slow speed might still be insufficient to cool the engine adequately under heavy load or high ambient temperatures.
* Is the fan blowing *adequately*? Make sure nothing is obstructing the airflow through the radiator and across the fan. Leaves, debris, or even a bent fan blade can reduce cooling efficiency.
In short: While a working radiator fan is a positive sign, it's important to ensure it's functioning correctly. If you have any doubts about its operation, such as:
* Constant running
* Failure to turn on when the engine is hot
* Insufficient cooling power
* Unusual noises
It's best to have your cooling system checked by a qualified mechanic to prevent potential engine damage from overheating.
