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How does a gas oven work?

May 13, 2024

In this short guide, we'll provide a detailed explanation of a gas oven's operation in order to respond to the query "how does a gas oven work?" In addition, we'll go over how an oven's various components function and what influences an oven's performance.

How does a gas oven work?

With the use of a gas burner, gas ovens prepare food. Natural gas is needed for these appliances to run continuously; depending on the model, either a spark generator or a tiny pilot flame is used to ignite the gas.

The gas supply is opened when the gas oven is turned on, allowing gas to flow from the main supply to the gas oven. Following the gas flow, an ignition switch must be turned on to turn on the spark generator inside the gas oven. This spark will ignite the gas and light the burner. The gas will also ignite if the oven has a pilot flame that is always lit.

The gas oven's thermostat monitors and controls the heat while cooking to maintain a constant temperature during cooking without overheating. The burner will be put out and the gas supply will be turned off when the temperature reaches the required level. The oven will turn itself back on as soon as things start to cool down until the temperature is back to normal.

What are the different parts of a gas oven and how do they work?

Oven burner:

To allow the flame to burn from one end of the burner, sometimes at the front and down the other side, it is simply an aluminum tube that has been machined and drilled with exact exits dispersed throughout the length of the tube. Where the ignitor is installed on the burner assembly, a bracket is often attached. This keeps the ignitor at the right distance from the burner assembly, ensuring that the gas is ignited properly. The flame spreader, a substantial piece of metal (not aluminum) intended to disperse heat uniformly across the oven cavity, is positioned beneath the burner assembly.

The Gas Oven Ignitor

The ignition systems used in gas ovens today must be able to withstand extremely high temperatures. Due of the silicon carbide in which they are constructed, they can withstand extremely high temperatures. Despite its name, ignitors are actually electrical components of the burner's circuit at all times when it is burning, not just when it first ignites. The igniter and oven safety valve are electrically connected in a series.

The Oven Safety Valve

As the oven ignitor heats up its resistance goes down causing the current flow in the circuit to increase. The increase in current flow within the circuit heats the bimetal inside the oven safety valve causing it to flex just enough to allow gas to flow into the burner assembly. Once the gas passes through the burner assembly and comes in contact with the now glowing red hot ignitor it ignites. As long as electricity is flowing through the igniter and the igniter is drawing sufficient current, the bimetal in the oven safety valve will stay flexed open allowing gas to flow.

The current flow in the circuit increases as the resistance of the oven ignitor decreases as it heats up. As the circuit's current flow increases, the bimetal inside the oven safety valve warms up and flexes just enough to let gas into the burner assembly. The gas ignites when it goes through the burner assembly and makes contact with the ignitor, which is now burning bright and red. The bimetal in the oven safety valve will remain flexible open, enabling gas to flow, as long as electricity is passing through the igniter and the igniter is receiving adequate current.

The resistance of the igniter controls how much current is drawn inside this circuit. The oven's manufacturer ensures that all oven igniters are compatible with the oven safety valves. It is crucial that you do not combine separate oven safety valves with different igniters. Always use the oven or range model number to choose the oven igniter and safety valve that the manufacturer recommends.

And finally, even if an oven's ignitor glows red, it could still be broken. This is because whether or not gas will flow from the oven safety valve depends on the ignitor's resistance. The oven ignitor can still flash red even if its resistance is just slightly lower, but it won't be able to draw enough current to open the oven safety valve, giving the impression that it is in good working order.


When the burner is lit, a thermostat gauges the inside temperature of the gas oven. This component is in charge of making sure that the food is prepared at the temperature that was specified using the oven controls.

Below is frequently asked questions most people will be interested about gas oven:

Do gas ovens work without electricity?

Because the gas and the electricity are distinct, a gas oven can function without electricity. Modern gas ovens might feature electrical parts that regulate the flow of gas, but older gas ovens merely have valves. In the event that you lose power, they remain unchanged.

Where does the gas come out in a gas oven?

For the purpose of transferring heat from the oven to the stovetop, gas ranges contain a vent that is typically situated in the center of the display panel.

Can you light a gas oven manually?

No, since the gas is under the control of the gas safety valve, this is not possible. Before the gas can exit the gas safety valve, the ignitor must be in good operating order.

What happens to a gas oven when the power goes out?

When electricity is restored when a gas range's oven is left on after a power outage, the igniter detects gas flow and lights the burner. Turn the oven knob off and back on to relight it if it does not ignite.

Does a gas oven take longer to cook?

Yes, on occasion. Food can take longer, often much longer, to brown on the top with gas ovens since there is typically more ambient moisture in the air. Move the tray to the top of the oven or position a second baking sheet right above the meal to hasten the browning process.

Are gas ovens dangerous to use?

Food is cooked using a number of heat sources, including electricity, gas, and wood. When cooking, each of these heat sources can pollute the air within the home. The airborne pollutants formaldehyde, carbon monoxide, and others can be dangerous to humans and animals and are released by natural gas and propane stoves.

What are the pros and cons of a gas oven?

A gas oven has a lot of benefits and drawbacks.

Although more expensive than the electric counterpart, gas ranges typically cost less to operate.

With the aid of fans, they distribute heat evenly, however if fans are not fitted with the oven, it may be necessary to rotate the food frequently in order for it to all be properly cooked.

Will gas ovens explode?

If a gas stove is not properly maintained, it is most likely to explode. This could happen if the stove has a gas leak or if one of the burners isn't working properly. Modern gas stove explosions are uncommon, but that doesn't make them impossible. 

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