Cooling Fan
The cooling fan pulls air through the radiator when the car is slow or stationary.
What is Cooling Fan?
Most modern fans are electric and controlled by the engine control unit. Some large engines use belt-driven fans with viscous couplings. Many modern fans have variable speed controlled by a module, while older systems use one or two speeds through relays.
How it works
The fan switches on based on coolant temperature and air conditioning demand.
Why it matters for your car
A fan that does not run causes overheating in traffic. The fan may keep running for a few minutes after the engine is switched off; this is normal on many cars.
Other terms
- Actuator Test (Output Test)
- Adaptive Headlights
- Airing Down (Lowering Tyre Pressure Off-Road)
- Battery Passport (EU)
- Crown Wheel And Pinion (Ring And Pinion)
- Dyno Test (Dynamometer)
- Hydrogen Combustion Engine
- Laser Headlights
- Paint Oxidation (Faded Paint)
- Performance Exhaust
- Plug & Charge (ISO 15118)
- Subframe
- Sun Visor
- Total Cost Of Ownership (TCO)
- TPMS (Tyre Pressure Monitoring System)
- Trafficators (Semaphore Indicators)
- Variable Valve Timing (VVT)
- W Engine (W12, W16)
- Wheel Hub
- Window Regulator