USB problem No more pilot light. Heated when plugged.

Sounds like the thermocouple is bad. The thermocouple is a sensor that is heated by the pilot light. The thermocouple let's the gas valve know that there is a flame to ignite the burner when you turn up the thermostat. When you first light your pilot light by holding down the pilot light button and the pilot light goes out after holding the button for about a minute then the thermocouple is usually bad. It is an inexpensive part normally found it any Box Store.

Could be the bulb of the safety thermocouple is not being heated by the pilot light or the thermocouple is faulty.

The thermal-coupler has failed. You can remove and test with a milli volt meter. When coupler end heated heated with match the volt meter should read 20mV or above.

Here is a video that explains hope to test,

Hope this helps, J

It may may be the safety system for pilot light is maladjusted. There is a sensor which has to be heated by the pilot light or the valve shuts down altogether. If the pilot light stays lit then you check to see if it is positioned to light main burner.

It should be located under the dashboard at the junction with the wall of the center console.

Make sure the thermocoupler is being heated by the pilot light flame. It could also be gunked up but you can clean it with a scouring pad, or it might need to be replaced. The thermocoupler is the most likely cause because if it isn't heated then the gas valve will not open up and no gas will flow to the burner. Since your pilot light is on then you do have gas to the valve.

make sure the thermocouple is positioned above pilot light this part needs to be heated up by the pilot light to keep gas going to the pilot light. if the thermocouple is positioned above pilot light and it doesn't stay light, replace thermocouple.

The system works off of a thermocouple that is heated by the pilot. The thermocouple creates millivolts that magnetize a head behind the control knob. When you push in the knob the magnetized head behind the knob holds the gas valve open. So obviously the head is not being magnetized. First make sure that the pilot is not plugged and the flame is large enough to heat the thermocouple. Also sometimes you may need to hold the knob for several minutes before the pilot will stay on. Also patio heaters have a safety feature that will cut the millivolt circuit if the heater falls over. It is possible that this safety device is tripped or defective causing the pilot to not stay lit. Also check for any loose wires on the millivolt system.

The thermocouple that controls the gas to the pilot light must be bad. The thermocouple, when it is heated by the pilot light keeps a valve open that keeps gas flowing to the the pilot light. This thermocouple closes the valve that supplies gas to the pilot light, this is to prevent gas from continuing to escape when the pilot light goes out. This is a safety issue, I recommend that you call a professional about this problem. You might be able to repair it your self by replacing the thermocouple but I still recommend that you have it checked by a professional.

does it light then immediately go out? if yes, usually you have to hold in a button to allow gas to flow while you light the pilot, and hold this button until the therm0-couple is heated with the pilot flame. If the thermo-couple is not sufficiently heated and you let go of this button, the pilot light will go out as the safety circuit thinks there's no flame and unburned gas is entering the oven.

The other thing you could do is adjust the height of the pilot flame... there's usually an adjustment screw near the button described above which will allow you to adjust the height of the flame. Make the flame just big enough to guarantee that it keeps the thermo-couple hot AND that it can light the oven without being blown out.

Good luck.