What causes the radiator fan to come on?
Defective temperature switch, coolant sensor or other sensor. Engine thermostat is stuck OPEN (engine never gets hot enough to turn on the fan) Faulty fan relay. A wiring problem (blown fuse, loose or corroded connector, shorts, opens, etc.)
What happens if I disconnect my radiator fan?
If the fan stops turning, then the car likely will overheat (especially at low speeds or idling), which can cause the head gasket to fail. This would mean an expensive repair bill.
Where does the radiator fan switch go?
It should be in the head or manifold. It’s a closed system, so at some point the temperature of the water should stabilize and be the same throughout (radiator/engine), but I personally care about how hot my engine is running, not how hot the radiator is.
How often should the radiator fan turn on?
Temperature will often determine the time that a radiator fan starts up. A temperature-sensitive switch functions to turn the fan on and off periodically. Radiator fans are designed to start when the temperature of the engine coolant reaches around 200 degrees Fahrenheit.
How long can you drive without radiator fan?
Yes, you can drive your car without a radiator fan, but you never should. Your vehicle’s cooling system is crucial to its performance, and every time your engine overheats, you cause damage.
Can you drive with a bad radiator fan?
Q: Can you drive with a bad radiator fan? Yes, if your radiator cooling fan fails, you can drive with it. Technically, your vehicle engine does not need a radiator fan to operate. However, if your vehicle engine does not receive enough air blowing it constantly, it will eventually lead to overheating.
What temperature should the radiator fan turn on?
about 200 degrees Fahrenheit
Your radiator fan should kick in at about 200 degrees Fahrenheit. If you notice your vehicle is overheating or at the very least running hotter than it normally does, listen for the fan to see if you can hear it.
How does a radiator fan work when the AC is on?
The electric radiator cooling fan assembly is controlled by a thermoswitch located in the side of the radiator. At higher coolant temperatures, the switch closes to start the cooling fans. Any time the coolant temperature rises to higher than normal levels, the fan will start and continue to run until coolant temperature returns to a normal range.
When to turn on the coolant fan switch?
As engine temperature rises to a specific threshold, the switch is activated powering on the coolant fan. The coolant fan will continue to run until the engine temperature cools down to a specific predetermined level.
What are the symptoms of a bad thermo coolant fan switch?
Several symptoms may point to a bad or failing thermo coolant fan switch. 1. Engine overheating Engines generate an enormous amount of heat and as a result are subjected to very large temperature swings if this switch does not operate effectively.
What should I do when my radiator fan comes on?
It is for the fan module. When the ignition is on and you pull it the fans should kick in and turn slow speed. You can also put direct power by pulling the fan plugs and putting on power and ground to them. Fast speed and slow speed, fan should start turning.