My forth model ( PBR gas cooker )

Looks good. I like the UV mapping. Nice model.

Good stuff, its working now.

Something strange about the metal on the stove top, looks like its crosshatching?
The dials for the gas (on/off) look like the texture is too low resolution, the white dots look pixilated. Same with the textures above the dials.
There is lots of noise in the render, trying increasing the render quality.
The handle and geometry shapes look nice, bevels are great.

Double check your output, none of your previews are working.