Our heater pilot doesn stay lit. What is the cause?
When you push down on the pilot button, you are allowing gas to go directly to the pilot burner. The flame in turn warms up the thermocouple next to it, which in turn opens up a valve in the gas control, allowing gas to go to the main burner if the gas control knob and thermostat setting call for it. If the flame won’t stay lit, it is most likely a pilot adjustment problem or a thermocouple problem.