1. Faulty Thermocouple: The thermocouple is a safety device that senses the presence of a flame and keeps the gas valve open when the pilot light is lit. If the thermocouple is damaged, it may not be able to detect the flame, causing the gas valve to shut off and the pilot light to go out. To check if the thermocouple is faulty, use a multimeter to test for continuity. If there is no continuity, the thermocouple needs to be replaced.
2. Debris or Obstruction: Check if there is any dirt, dust, or debris blocking the pilot light orifice or the flame sensor. If the orifice is clogged, the gas flow can be restricted or blocked, preventing the pilot light from staying lit. Clean the orifice and flame sensor using a soft brush and compressed air if necessary.
3. Gas Pressure Issues: Low gas pressure can also cause the pilot light to go out. Check the gas pressure coming into the appliance using a manometer. If the gas pressure is too low, it may need to be adjusted by a qualified professional.
4. Control Knob Position: Make sure the knob is turned to the "on" or "pilot" setting correctly. If the knob is not in the proper position, the gas valve may not open, preventing the pilot light from igniting.
5. Faulty Pilot Light Assembly: In some cases, the entire pilot light assembly might be faulty or worn out. This can include issues with the pilot light tube, the igniter, or other components. If other solutions don't work, you may need to replace the pilot light assembly.
If you have tried the above solutions and the pilot light still goes out, it's best to consult with a qualified technician or appliance repair specialist for further inspection and diagnosis. For safety reasons, avoid attempting to repair gas appliances yourself unless you have the necessary knowledge and experience.
