Hold the gas control button down while you hold the end of a lighted match or lighter at the end of the pilot tube. The pilot should start as soon as the flame is close enough. Hold the pilot button down for about 20 seconds to give the thermocouple time to heat up, then release it. The pilot should stay lit.Click to see full answer. Also question is, where is the pilot light on my gas fireplace?To ignite the pilot light, press your finger into the center of the control knob and hold it in place. Then, hit the fireplace’s ignition switch, which is typically a red button located near the control knob. Tap the switch until the pilot light ignites. what happens if the pilot light goes out on a gas fireplace? When a pilot light goes out on a gas fireplace, there is cause for concern if the gas flow hasn’t been interrupted. More commonly, a pilot light will go off because of a failure in the supply of gas. One thing to check is the gas valve on the fireplace and make sure it’s open. Consequently, is it safe to keep pilot light on gas fireplace? Leaving the gas on keeps this compound moving out of the tubes. Keeping the pilot light on will also keep moisture out of the unit and in turn, help prevent corrosion. As you can see, it’s probably best in most cases to extinguish the pilot light in your gas fireplace during the months when you don’t need heat.Why is my gas fireplace not turning on?1. Pilot light systems are the most common reason gas fireplaces fail to light, so check the main gas valve to make sure the gas is turned on. If gas is coming out of the pilot, but it still won’t light, the spark igniter could be the problem. Look for and clear out any debris between the igniter and thermocouple.