What Temp Should Radiator Fan Turn on

The radiator fan in most cars is designed to turn on at around 200 degrees Fahrenheit. However, some newer cars have a thermostat that allows the fan to turn on at a lower temperature, such as 185 degrees Fahrenheit. If your car does not have a thermostat, you can still manually turn on the radiator fan at a lower temperature if you wish.

Your car’s radiator fan is responsible for keeping your engine cool. So, what temperature should radiator fan turn on? There are a few different temperatures that can trigger your radiator fan to turn on.

If your engine is running hot, the fan will come on to help cool it down. Additionally, if your A/C is turned on, the fan will also run to help keep the refrigerant cool. Ideally, you want your radiator fan to turn on before your engine starts to overheat.

This way, the fan can prevent any damage from happening to your engine. However, every car is different so it’s important to consult your owner’s manual to see what temperature is ideal for your car’s radiator fan.

What Temp Should Radiator Fan Turn on

Credit: www.cashcarsbuyer.com

How Long Does a Radiator Fan Take to Turn On?

Assuming you are referring to a car’s radiator fan, most fans will turn on within a few seconds of the engine being started. The time it takes for the fan to turn on can be affected by a number of factors, including the temperature of the engine, the speed of the engine and the type of fan used.

Does Thermostat Turn on Radiator Fan?

The radiator fan does not turn on when the thermostat is turned on. The fan only turns on when the engine is started and running.

Should You Be Able to Hear Your Radiator Fan?

If your radiator fan is making a loud noise, it could be a sign that it’s going bad. If you can’t hear your radiator fan, it might not be working properly.

Does the Radiator Fan Run While Idling?

Yes, the radiator fan will run while idling. It is important to keep the engine cool while it is running, and the fan helps to circulate air through the radiator to keep the engine at a consistent temperature. If your car starts to overheat, it is important to turn off the engine and let it cool down before continuing to drive.



The radiator fan in most cars will turn on when the engine coolant temperature reaches around 200 degrees Fahrenheit. However, some cars have a different temperature threshold for their radiator fans. If you’re not sure what temperature your car’s radiator fan should turn on at, consult your owner’s manual or a mechanic.