Hi my MacBook Air 2017 the fan is on evendo iam not using laptop how can I I turn fan off

Giovanni2007 wrote:

How can I turn fan off my 2017 MacBook Air I haven’t used it since yesterday and I turn on MacBook Air and the fan still on is a loud sound

Check for these causes of loud fan: About fans and fan noise in your Apple product - Apple Support

You can try resetting the SMC: Reset the SMC of your Mac - Apple Support