The main problems that require replacing the radiator fan are:
-
Engine overheating:
The fan cannot cool down, especially:
When driving at low speeds.
During traffic jams or long stops.
Consequences of overheating:
Deformation or cracks in the cylinder head.
Damage to the cylinder head gasket.
Failure of other engine systems. -
Mechanical damage to the fan:
Fan blades:
Cracked or broken blades cause imbalance and noise.
Blade deformation reduces efficiency.
Fan housing:
Damage from foreign objects (e.g. stones).
Broken fan mount. -
Fan control system malfunctions:
The fan does not turn on, even if the engine overheats.
Possible causes:
Temperature sensor failure.
Faulty control relay or fuse.
The fan does not turn on in a timely manner or does not turn on at all. -
Fan bearing wear:
Signs of wear:
Extraneous sounds: squealing, crackling or clicking when the fan is running.
Vibration during operation due to imbalance.
Consequences:
Bearings seize, the fan stops rotating.
Increased load on the fan motor, which leads to its failure. - Unstable fan operation:
Inconsistent rotation speed:
The fan may accelerate or slow down chaotically.
Decreased efficiency of engine and radiator cooling.
Continuous fan operation:
The fan does not turn off even after the engine has completely cooled down.
Possible causes:
Faulty control system sensors.
Stuck relay or wiring problems.
Replacing the radiator fan is the process of installing a new cooling system fan. It plays a major role in maintaining engine temperature, especially when driving at low speeds or in conditions of frequent stops. If a faulty fan is not replaced in time, the engine may overheat, which will lead to serious repairs
