How long ago did fire use start

1.5 million years ago

Explanation:

Fire was first controlled by humans anywhere from about 230,000 years ago to 1.4 or 1.5 million years ago, depending on which evidence you accept as definitive. Evidence for the use of fire by Homo Erectus beginning some 400,000 years ago has wide scholarly support.

Fire was used 1.5 million years ago back than they didn't have ovens to make food or have warm heat like now we have heaters n ovens they would use sticks n gather them to make heat for them to warm up or to cook on