Pilot lights but main burner dose not light when turned on

thermocouple or flame sensor faulty

If I understand correctly the pilot light works but the main burner doesn't light? It is probably the main gas valve needs to be replaced. Unless one of the overload sensors are out.

If the pilot is lighting and the thermo couple is in the fire and turned red and the pilot still does not stary on change the thermo couple. They are available in any home improvment store.

the pilot light serves to purposes. it is the source of ignition for the main burner and is a safety device that detects wether there is a flame or not. if the pilot light stays on when you stop pressing the pilot light button then you need to turn the knob to the on position to light the main burner. the pilot light is not the on position. if the pilot light goes out when you stop pressing the pilot light button then the thermocouple or flame sensor needs replacing. good luck

lightly tap on the area where the wires are connected. the valve will stick at times. try that.

This range has a standing pilot light for the top burners and griddle top. If you look through the small hole under the flat top griddle you can see a small line about 1/4 inch that runs from the main gas manifold to the pilot light about 6 inches back under the griddle top. You will need a tightly wrapped piece of paper or a long match or small wooden stick, like a chop stick. Light the end of your paper, or stick and put it through the hole all the way to the pilot light. It should catch on fire. Whenever the main gas line is on, the gas will flow through the pilot light. If it will not light, there is a pilot light adjustment that is a very small screw in the middle of a 1/2 inch square metal fitting that is screwed into the gas manifold. If the pilot won't light, this screw may be turned all the way in, thus cutting the gas off to the pilot light. If necessary take a very small flat blade screw driver and turn the screw counterclockwise a half turn. That will increase the gas flow to the pilot light. Another way to light the pilot is to put your burning stick or match into the hole near the burner under the griddle plate, then slowly turn the heat valve to the on position. The main burner will light and then the pilot will light off of it. Don't get your face too close to the griddle when you light it, gas can flash back into your face.

The main burner valve is the oven valve. The pilot will be next to the burner and you either have to insert a long shiskabob stick ( lit) into the hole or lift up on the bottom of the oven (inside) and you will see the pilot.

The Tstat has a capillary that looks like a thermocouple but it isn't, its a bulb with liquid that expands and contracts based on temperature. A pilot can go out due to a high limit switch being week or getting to hot and that can be shaped like a thermostat capillary or can be simply a disc with a button if even there is a high limit on your stove. There likely isnt. So see the next suggestion.
I suggest lighting the pilot, turning on the main burners while watching the pilot. If the pilot shrinks in size, then check your gas pressures before and after turning it on and seeing if there is a wide variation. I would suggest the pilot is dirty or the pressure regulator is faulty.

try cleaning the pilot oriffice it sounds like the flame is weak