.. Fix the water boiler

The pressure gauge on top left will show the pressure. You are heading towards the green line. If you reach the red line the puzzle resets.

But first, fill it with water ( Push the lever over the round window twice so that the round window is filled with water. )

Then push the ignite button ( The red button at the bottom. ) and adjust the two settings to increase the pressure gauge. Try different combinations until you hit the green line.

Set the temperature to 60 and the gas setting to 1/2.