Asked by: Kiyoko Sisamon
asked in category: General Last Updated: 9th February, 2020

Why does my radiator fan come on when I start my car?

Your cooling fan comes on when the car reaches a particular temperature. The trigger is the thermostat in the radiator of your vehicle. It is what sends the signal for the fan. Most cars will switch the cooling fan when the coolant temperature reaches 85 degrees Celsius (185 degrees Fahrenheit).

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In this regard, should radiator fan come on when car starts?

Extra cooling is not needed when a cold engine is first started, so the fan does not come on until the engine reaches normal operating temperature (195 to 215 degrees). The fan will then cycle on and off as needed to maintain the coolant temperature.

Additionally, what makes radiator fan come 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.

Similarly, it is asked, what are the symptoms of a faulty cooling fan switch?

Several symptoms may point to a bad or failing thermo coolant fan switch.

  • 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.
  • Check Engine Light comes on.
  • Broken or shorter signal wire.

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.

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