It can be as simple as a loose wire connection, causing your oven to take an eternity before it preheats properly. But unfortunately, it is not that straightforward in some cases. That is, more complicated causes include damaged heating elements as well as a faulty temperature sensor.
And while diagnosing an electric oven is somewhat easier, doing the same with gas ovens is pretty tough. Although the problem mostly occurs at the ignitor, confirmation requires a thorough inspection.
How Long Should It Take for My Oven to Preheat
So, before jumping to a conclusion, it is wise if we know to what extent preheating latency is considerable. Generally, ovens take anywhere between 12 to 15 minutes to reach around 350° F. The value stays pretty much the same even with all the racks inside.
But if you want to achieve higher temperatures, the oven will take longer. For example, reaching 425°F will take 17-18 minutes approximately. That, however, applies to gas ovens only, whereas electric ovens might require up to 20 minutes.
Why Does My Oven Take So Long to Preheat
A weak igniter is a vital cause for taking a long time to preheat a gas oven. When an igniter fails to spark the gas into flames within a minute, the ignitor is too weak to open the safety valve. In this circumstance, there is no other option but to replace. On the contrary, the heating element and thermostat is the significant reason for taking much time to preheat an electric oven. Therefore, there are several factors that cause an extended period to preheat.
Why an Oven Takes a Long Time to Heat Up? Although it is hard to tell for sure without inspecting, some common issues cause ovens to heat up slowly. I have enlisted some of them below.
Defective Heating Elements
The most common problem behind slow heating up is a defective heating element. Generally, an electric oven comes with two core elements. One is on the top for baking, while the other is on the bottom for broiling. If one of the elements is burning out or not working, it glows bright red.
So, when your oven is warm but does not provide you with the correct temperature, check the heating element.
Sometimes when the oven is set at prebake mode, and both of the heating materials are on, probably one element is working, but the other is not. In this circumstance, you need to replace the ruined one.
Defective Heating Element
Loose Wire Connection
But, if you notice installing a new element does not change anything, there might be an electrical issue. In this case, check the wires that lead to the heating element hook-up to the heating element. The connection might have gotten damaged or had been loose all along.
Loose Wire Connection
Faulty Oven Temperature Sensor
Most electric ovens use a temperature sensor that monitors the oven temperature. And all sensors show output through the oven display. But the readings may not be correct when the sensor becomes defective. Besides, your oven may not heat up correctly due to a faulty temperature sensor. In this circumstance, it is better to replace the sensor altogether.
On the contrary, your unit may not come with a built-in sensor. Instead, it might be using a temperature-sensing bulb for monitoring the oven temperature. Make sure this bulb is not burnt out, as the readings will be wrong otherwise.
Faulty Temperature Sensor
How Can I Make My Oven Preheat Faster
When you need to preheat your oven faster, it is the best bet to turn on your broiler for three to five minutes. After that, turn off the broiler and adjust your oven temperature to whatever you need. This process allows your oven a quick burst of heat. Besides, this helps you to reduce your preheat temperature dramatically.
With that said, you can reduce the amount of frustration involved by keeping your expectations in check. For example, try to allocate at least 25-30 minutes as the preheat time of your oven and set a reminder accordingly. That way, you’ll be able to start the preheating process beforehand.
However, if you are experiencing the problem on a high-end model, it might be due to thicker walls. Generally, the walls are made thick to increase efficiency. But they can sometimes get in the way of your expected preheating time. Still, it should not take more than 5 to 10 minutes extra.
Turn on the Broiler for Three to Five Minutes
Frequently Asked Questions
Do some ovens preheat faster?
Gas ovens are usually faster than their electric counterparts in terms of preheating. However, the difference is not so drastic, 5-6 minutes maximum. Still, the extra time might bother you if you have orders coming in each minute. In that case, a gas oven is the better bet.
Why Does Gas Oven Take So Long to Preheat
Sometimes you may face that leaving your oven for an hour does not preheat it at all. In this case, the most likely issue is a weak or failing oven igniter. Heat resistance igniters can lose resistance as they get hot over time. So, they will not transmit enough resistance to the gas valve to grant the main valve to turn on. That can occur while the igniter is getting weak or is about to wear out completely.
If your oven cannot draw enough amperage, your ignitor might have lost continuity and needs replacement. Yet, if you have a defective gas safety valve, it may be a significant reason behind not heating up fast.
How can I tell if my oven is heating correctly?
First, take an oven thermometer and hang it at the center to the point from where the middle rack begins. Then, set the temperature at 350°F and start preheating. Wait for at least 20 minutes before you take the temperature reading. This way, you can determine whether or not the oven reached the desired temperature.
Answering why your oven takes so long to preheat is not as straightforward as it seems. Nevertheless, the reasons behind this are limited in number, meaning they will fall under the categories described above. You just have to keep patience until finding the actual culprit and keep your expectations for preheat time in check.