how do i adjust the thermostat on an old gas range?

Answer 1

I have to assume you're talking about the thermostat that controls the oven heat. Not knowing how old your unit is, on most ranges the oven control knob will pull straight off the shaft and reveal the valve behind. The opening of the range body will be just slightly larger than the valve shaft, so you will need a fairly small screwdriver, usually flat bladed, to possibly loosen a small screw and move a small lever or slide control on the side of the valve. Don't move it much at a time, just a few degrees, then try the oven to see where the setting is . You'll need a good oven thermometer to check.