We often ask ourselves is my gas log ignitor working when we try to turn on the fireplace logs. There are several critical areas to check if the gas log ignitor is not working correctly.
There are 2 different ways gas ignitors work. The first way is a standing pilot. Gas is constantly burning a tiny flame that on the side of the burner. When you want to turn on the gas logs, this pilot light keeps the thermocouple (safety for the gas valve) energized. If the flame is working, the gas valve will open. The gas will go across the flame and ignite.
The second type of ignitor uses an ignition voltage spark that will light the gas and provide the safety when you call for heating in the logs. This is a more modern way and uses less gas as there is no standing pilot light burning 24/7.
Don't forget the simple cleaning part of gas logs
Another often overlooked issue with gas logs not working is sand, dirt or debris clogging up the orifice or smothering the flame area. We have said this many times, do not burn other materials in the gas log fireplace. They put off ashes and soot that will clog up the small hole for the pilot light.
This is the main reason gas log manufacturers design in oxygen sensors (O2) for the safety side. If the right amount of oxygen is not available for the blue combustion flame, the system will not operate. It might light for a few moments but the safety will trip it off shortly.
If you are not completely comfortable with working on gas lines and ignitors, stop and call a honest reliable chimney services company. They know exactly what to look for and will most likely have the parts in their vehicles. You can be back up to working gas logs within an hour or so.