Posted on 10/31/2025
When your engine starts to overheat or your A/C stops blowing cold air, a faulty radiator fan could be the hidden culprit. This critical cooling system component plays a major role in regulating engine temperature. It kicks in when your vehicle needs extra help keeping things cool, especially in stop-and-go traffic or on hot days. If it’s not working, your car can quickly overheat. Here’s how technicians typically diagnose a radiator fan issue and what signs you can watch for. Why the Radiator Fan Matters Your engine generates a lot of heat, and while the coolant and the radiator dissipate most of it, the radiator fan provides additional cooling when natural airflow isn’t enough. It pulls air through the radiator when your vehicle is moving slowly or idling, ensuring the engine stays within a safe temperature range. If the fan fails, engine heat can build up rapidly, especially in traffic. Overheating can lead to warped cylinder heads, a blown hea ... read more