How Do You Know When A Gas Oven Is Preheated? [See How]

“Preheat the oven” is probably the first instruction in your recipe when baking. If you’re an oven first-timer, you want to know how you can tell your gas oven is preheated.

Perhaps, it’s not your first time with gas ovens, but you don’t seem to be preheating your gas oven properly. The gas oven must be preheated if your food must cook evenly. It also helps to get meals ready quickly.

If the gas oven is not properly preheated before baking, baked goods will come out crumbly, undone in the middle, flat, burned, or overly dense.

So, how do you stop this cycle of half-cooked food? Make sure your gas oven preheats properly. Continue reading this article to know how to tell that your gas oven is fully preheated.

How do you know when a gas oven is preheated?

1. Look at the indicator

Look at the LCD screen or the control panel. Modern gas oven models have an indicator that reads ‘preheating’ or ‘PrE’ while the oven is preheating.

When the oven preheats fully, the indicator should disappear. But, not all gas ovens use this indicator. Some ovens use lights, symbols, or ascending bars to show a temperature rise.

In addition, some gas ovens show the temperature of the oven on the LCD screen. It is easier to tell that these ovens are preheated.

2. Listen for a beep

Some modern gas ovens use audio sensors as a sign that the oven has finished its preheating cycle.

These ovens have control buttons that start a preheating cycle. A long beep signifies that the gas oven has finished preheating.

Moreover, if your gas oven has a fan, listen for when the fan starts working to disperse the heat around the oven.

3. Use an oven thermometer

Oven thermometers are easier to work with when preheating. You can put these thermometers in the middle rack of the oven and use them to determine the temperature of the oven.

Oven thermometers are designed to withstand the high temperatures of gas ovens. Hang the thermometer where you can see it through the oven door, so you don’t have to open the door and cause the temperature to drop.

How long does it take a gas oven to preheat?

How long it takes a gas oven to preheat depends on the temperature you’re heating it to. Below is a list of the average preheating time for different temperatures:

  • A gas oven preheats to a temperature range of 250°F to 300°F within 5 to 6 minutes
  • It takes 7 to 8 minutes to preheat a gas oven to a temperature range of 325°F to 350°F
  • A gas oven preheats to 375°F or 400°F within 10 to 12 minutes
  • It will take 15 minutes to preheat a gas oven to 425°F
  • It will take 17 minutes to preheat a gas oven to 450°F
  • A gas oven preheats to 475°F in 20 minutes

How to preheat gas oven

  • The first thing to do is to make sure your gas oven is in a well-ventilated area
  • Keep all windows open because gas ovens emit fumes
  • Then, turn on the oven and set it to your desired preheating temperature
  • Push necessary buttons like broil, grill, or bake
  • Leave the oven to preheat fully before you put food into it

Signs your gas oven is not preheating

Your food cooks unevenly

This is the first telltale sign that your gas oven is not preheating properly. When your cakes are gooey in the middle, burned on the sides, or unevenly brown, the gas oven is not preheating.

The elements do not produce heat

When your food cooks unevenly, it’s a sign that the gas oven did not preheat fully before you put the food in it.

But if you’re sure that you allowed the preheating time, then the problem could be that the heating elements are not producing heat.

Any discoloration, splitting, and blistering on the elements is a sign that the elements are bad. Also, if the flames are orange or yellow, the oven may not preheat properly.

Preheating takes too long

If your oven takes too long to preheat, it could be a sign that it is not preheating properly. A gas oven that preheats slowly needs to be calibrated.

However, slow preheat times could be because the temperature sensor has worn out. Look into the gas oven and make sure the sensor is touching the wall of the oven. If not, position it properly.

The indicator fails

When the preheating indicator of your gas oven no longer indicates that it is preheated, it could be a sign that the oven is not preheating.

However, this is not a reliable sign because the indicator could be faulty, but the preheating element is not.

Why is your gas oven not preheating?

Faulty temperature sensor

The temperature sensor is a thermostat that regulates the temperature in the oven. When it is faulty, it assumes that the oven is hot enough even when it is not. As a result, it prevents the temperature from rising and reaching the desired level.

A bad igniter

The igniter in a gas oven is responsible for generating heat. It is an essential part of gas ovens and preheating. Once it goes bad, preheating time becomes slower, or the oven generates little or no heat.

The gas valve is bad

The gas valve is responsible for distributing the gas around the oven after the igniter generates heat. When it goes bad, gas distribution will not be even. Consequently, the gas oven will not preheat properly.

The control board is faulty

The control board coordinates all functions in the gas oven. When it is bad, the oven will not preheat. Unlike some faults in the gas oven, bad control boards cannot be fixed. You’ll have to replace the bad control board.

Damaged wiring in the oven

Look into the gas oven to check for burned, loose, or melted wires. Wiring problems should not get you scared. They are likely to happen because gas ovens have to work at high temperatures.

How to fix a gas oven that is not preheating

  • Locate and repair or replace faulty parts like the igniter, thermostat, elements, damaged wires, gas valve, and control board
  • Call an expert to check your gas oven


Why does your gas oven take so long to preheat?

Your gas oven could take too long to preheat because the igniter is bad or weak.

It could also be due to a fault in the wiring or a fault in the gas valve or control board. If your gas oven is not preheating properly or quickly, call an expert to check it.

Can you put food in the oven while it is preheating?

You may put food in the oven while it’s preheating but it is not advisable.

When you open the oven door while it’s preheating, the temperature will drop, and this can greatly affect the cooking process. So, it is better to allow the oven to preheat properly before you put food in it.

Why do you smell gas when your gas oven is on?

It could be normal to smell gas when you first put on your oven. This happens due to the combustion of gas at the burner, but the smell should go away after a few minutes.

However, if it lingers for too long, there could be a leakage in the gas tank. Find the leakage and fix it early.


There is nothing pleasant about spending time on a cake, and it comes out gooey in the middle, or you end up with a half-baked casserole. While you may try different ways to fix the meal, your gas oven was the problem after all.

Never play down the importance of a preheated gas oven. Allow the oven to preheat fully before you put your food in it.

If your gas oven does not have an indicator, hang an oven thermometer in the oven and read the temperature to know if it is preheated.

Make cooking in the oven faster by preheating sooner in the meal preparation process.

Thanks for reading.

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