What Causes a Car Radiator Fan to Stop Working?
2 Answers
Car radiator fan stops working due to: 1. Water temperature being too low; 2. Relay failure; 3. Thermostat switch malfunction. Solutions for a non-functioning car radiator fan include: 1. Checking if coolant temperature meets requirements; 2. Replacing the relay; 3. Replacing the thermostat switch. The car fan operates based on engine coolant temperature switch control, categorized into silicone oil clutch cooling fans and electromagnetic clutch cooling fans. Installed behind the radiator, the fan draws air through the radiator when activated. Its operation automatically starts or stops according to coolant temperature. Key operational requirements are: 1. High current during fan motor operation demands superior wiring quality; 2. High-speed rotation necessitates advanced manufacturing precision.
Last month my old Jeep had the exact same issue. When the cooling fan stops working, it's most likely an electrical problem. After hours of troubleshooting, I found it was a blown fuse—that little 20A blue square in the engine bay fuse box. But it could also be a relay acting up; think of it as the circuit breaker—if it fails, the fan won't receive the start signal. If you feel the fan bearing is jammed and won't spin, chances are the motor's burnt out. Actually, regularly rinsing the radiator fins with a pressure washer during car washes (avoiding clogging by willow catkins and mud) can extend its lifespan. Oh, and a faulty temperature sensor can also make the fan 'play dead'—this requires an OBD scanner to check trouble codes. If you're handy, you can replace parts yourself, but given the complex piping near the radiator, it's best left to a mechanic.
