Hi all what I want is a device that will turn on a fan when the temp
gets too hot and shuts down when it reaches another temp.
Thank you

They are called thermostats and are readily available from hobby stores
in various temperature ranges

David

Justice wrote:

Hi all what I want is a device that will turn on a fan when the temp
gets too hot and shuts down when it reaches another temp.
Thank you

In article _ESLe.180600$HI.42655@edtnps84, Justice wrote:
Hi all what I want is a device that will turn on a fan when the temp
gets too hot and shuts down when it reaches another temp.
Thank you

my car has one of them in the radiator

Seriously though pre-set thermostats are avaialble in a range of
temperatures... and for a little more $$$ adjustable ones are
available too.

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Bye.
Jasen