The first step in resolving a pilot light problem with your oven is to make sure that the oven has a pilot. Most ovens have a glow bar ignition system, which functions like a pilot, but is more prone to unique issues. If the ignition system of the oven does include a pilot, then it likely also contains a spark igniter to light it so it doesn’t need to keep on and waste gasoline. Some oven makers bypass the need for a pilot completely by formulating systems whereby an electronic spark directly ignites the gasoline.
Open the oven and then reveal the pilot and burner assembly by removing the cover plate and fire spreader, if there’s one. If the oven has a pilot light, you will notice a gas tubing which might or might not have a tiny blue flame burning during its end. If the oven has a glow bar, however, you are going to see an insulated electronics apparatus centered from the burner. Consult an appliance repair person to service a glow bar.
Determine if the oven has a spark igniter by turning the thermostat. You’ll hear a clicking sound and see a spark in the front of the pilot tubing if there’s one.
Make sure the gas is about before proceeding. Clean the tip of the pilot tubing using a needle and then try lighting it. When there’s no spark igniter, hold from the thermostat knob while you light the pilot with a game. Keep the knob in for about a minute after the pilot lights. When there’s a spark igniter, only turn the thermostat on and off until the pilot lights.
Observe the fire. It should be mostly blue and about an inch high. When it is orange or sputters, switch off the gas, unscrew the pilot tubing using a wrench and clean it with compressed air.
Start the pilot again and turn the thermostat up. The pilot flame must stretch, but it normally takes a moment or two for the fire to propagate to the burner. The reason for this is the thermocouple, which prevents gasoline from flowing as soon as the oven is off, must heat to a prescribed temperature before it sends an electric signal to the gas valve instructing it to open. The thermocouple or gas valve might be faulty if the burner doesn’t ignite.
Replace the thermocouple by unscrewing it in the gas valve with a wrench and unhooking the tip in the clip which holds it next to your pilot. Hook on the new one, screw it to the gas valve and then try the oven. Replace the gas valve if the problem persists.
Replace the spark igniter should itn’t produce a spark when you turn the oven. This might entail disconnecting some electrical wires, so have the oven manual handy.