5 Top Reasons Why An Oven Turns Off By Itself – Useful tips

Why does my oven keep turning off by itself? Meal prep takes a lot of time and you can’t afford to have the oven turn off when the family is hungry! To help you get to the bottom of this, we’re going to look at five of the most common reasons that this happens.

Typically, an oven turns off by itself because its ventilation system is blocked, there’s a problem with the temperature sensor or the heating elements are damaged. Additionally, the same could happen if it has electrical problems or if the control board is faulty (most common)

Let’s take a deeper dive into each of those possible reasons to understand why they happen and what you can do to fix the issue.

Blocked Ventilation Or Cooling Fan Failed

What It is

For an oven to cook food efficiently, it needs good airflow through it.

That’s why manufacturers build modern ovens with highly efficient ventilation systems that draw cool air from its surroundings using cooling fans and pushes hot air out the back of the unit safely.

And yes, even your electrically-powered oven has a ventilation system as well!

Oven turns off by itself due to cooling fan failure

Sadly, most people forget or don’t realise that those vents exist and require cleaning from time to time. That’s especially true in households that use their oven often.

Why it fails

With all that air flowing in and out of the oven, your oven’s vents will gradually see a buildup of dust and other messiness sticking in and around those vents.

A little dust might not seem like a big deal at first, but in a long enough timeline, it’ll build up to become a very problematic obstruction for your oven’s vents.

So, how does this cause your oven to turn off by itself? Well, ovens have built-in safety features to keep you safe from injury and prevent fires in your home.

When your oven can’t ventilate itself with enough air, it’ll overheat, causing those safety features to kick in and shut the whole oven off.

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Related: LG Oven F9 Error Code – What Does It Mean?

How to fix

Here’s the good news: if this is the reason that your oven is turning off by itself, it’s effortless to resolve.

All you have to do is clean all the dust and gunk out of the oven’s vents or check the cooling fan for a proper operation

Be sure to unplug your oven before you do anything, though. Once that’s done, you can vacuum dust and junk out of the vents and wipe them down as needed.

When smooth airflow resumes, you’ll have an oven that can keep itself cool each time you use it.

Faulty Temperature Sensor or Thermistor

What it is

When you look inside your oven, the odds are that you’ll see a small metal rod mounted somewhere towards the back.

That’s your oven’s temperature sensor. In some cases, you may see the user manual refer to it by another name as a thermistor (a word combining ‘thermal’ and ‘resistor’).

oven thermistor

That thermistor has one job: to help the oven reach and maintain your set temperature. You can think of it as a gatekeeper.

If the temperature isn’t high enough, it’ll allow power to flow through to the heating elements to continue raising the temperature inside the oven.

However, once the oven starts to reach your set temperature, the thermistor helps the oven maintain it by limiting the power flow to the oven’s heating elements.

Why it fails

Thermistor controls the flow of power to the oven’s heating elements. So, a faulty one can cause many problems, including shutting off your oven even before you finish cooking.

That happens because the thermistor reacts as if the oven is already too hot and cuts off the power flow prematurely.

How to fix

Replacing a faulty temperature sensor is reasonably straightforward.

You’ll find the temperature sensor inside the oven in most ovens at one of the back corners. All you’ll need is a screwdriver to remove it, as they’re typically secured with a pair of screws.

The tricky part would be to remove the capillary and electrical connections on the back end.

You’ll want to refer to your user manual to find the exact steps to do this.

Don’t worry if you’ve lost the manual, though. Most manufacturers now have them online for you to download whenever you need them.

Always shut off the power and gas connections before moving your oven or removing any of its paneling to replace the faulty temperature sensor.

Oven Turns Off By Itself? Damaged Heating Elements

What it is

All ovens rely on heating elements to generate heat and cook your food. Depending on your oven’s functionality, you may have several heating elements for baking, broiling, and convection cooking as well.

You can find these heating elements at the back of the oven and the top and bottoms as well.

oven heating elements

These elements will heat up in different combinations (e.g. top and bottom, bottom only, etc.) according to the type of cooking you’re doing.

These heating elements power on and off as often as needed to maintain the oven temperatures that you have set.

When the temp sensor detects that the temperature is too low, the thermostat will turn on the heating elements until the oven is hot enough.

Why it fails

There are many ways that your oven’s heating elements can get damaged.

A heavy weight falling onto them or bumping into them could bend those heating elements out of shape.

Internally, there might be wiring problems preventing the heating element from working altogether.

One of the possible outcomes of that damage is that the heating element may work for a while before cutting off entirely. From the outside, that’ll look as if your entire oven has turned off by itself.

How to fix

You can’t really fix a heating element, so you’ll have to replace them entirely.

Whether you’re doing it yourself or calling in an expert, these kinds of components can’t be rebuilt or reconditioned in any way.

Instead, the only solution is to remove the existing heating elements that are damaged and plug in new ones.

Electrical Problems– Why does my oven keep turning off?

What it is

If you’re using an electric oven and you’ve ruled out all of the other reasons mentioned above, then there’s a possibility that your problems might have something to do with the oven’s electrical system.

Remember: inside an electrical appliance like your oven is miles of wiring, many switches and plenty of circuitry.

oven circuit board

The more advanced your oven is, the heavier it’ll rely on all sorts of electrical (and electronic) components to work correctly.

Why it fails

There are several reasons why your oven may suffer from electrical problems. The most common (and the most frustrating) is the problem of a broken wire.

One possibility is that the wires weren’t appropriately attached at the factory and came loose later on.

The reason why something like a broken wire can be so frustrating is that it’ll be tough for you to pinpoint its exact location or the location of any other electrical problem for that matter.

How to fix

When it comes to fixing electrical problems, the best thing you can do is refer to a qualified technician.

Firstly, you’ll want to do this for safety reasons. Working with electrical parts can be quite dangerous if you don’t know what you’re doing, and it’s not worth risking injury or electrocution to do on your own.

Second, your technician’s experience is invaluable. They may have experienced similar problems with other customers and can therefore resolve your issue much faster than if you did it all on your own.

Problematic Control Board

What it is

Another possible reason your oven turns off by itself because it has a problematic control board.

In a way, you can think of the control board as the brain of your entire oven.

Once you’ve put in your instructions and set the time and temperature you want, the control board will coordinate all the different components to get the job done.

oven rear access panel removed

Why it fails

There are several reasons why an oven control board can start to fail.

For starters, your oven may have a control board that’s inferior in terms of quality.

If the control board wasn’t put together correctly in the factory, then it’s always been doomed to fail at some point.

Oven Control Board
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Besides that, the components on the board could suffer burns, either through power surges or if the oven’s heat somehow reaches the board.

On top of all that, you should also consider the age of your oven. If you’ve had it for several years, it could be that the components on the control board have stopped working correctly, which results in a wide range of problems including an oven that shuts off by itself for no apparent reason.

Another problem can occur due to control board overheating. Usually, as a result of not proper ventilation and some amount of heat spreads out on the control board behind the front panel.

oven ventilation slit

How to fix

There are two ways to fix this issue. The first one is to diagnose the control board and fix whatever component isn’t working properly.

If you have the skills and experience, you may choose this option, or you can send your control board for a professional to fix.

However, another option that many people prefer is simply to replace the control board entirely.

Just like the first option, you could hire someone to replace it for you, or you could find the parts you need from a reliable supplier and do it yourself.

The first step to replacing the control board is to turn off and disconnect the main power supply.

Then, you’ll have to remove whichever panel will give you access to where the control board is mounted inside of the oven.

Oven control boards are typically held in place with a few mounting screws.

Before you remove them, it would be an excellent idea to snap a few photos with your phone.

You’ll want clear images that give you a good view of where all the screws and connectors go into the control board so that you can instal the new one the same way.

Once you’ve fixed the new control board in place and ensure that all the connectors are correct, then you can put the panels back and plug the oven back in.

Remember: the oven’s control board is responsible for all of the oven’s different functions. To make sure that you’ve installed it correctly, it would be a good idea to give each of those functions a quick test.

Final Thoughts

Modern ovens come with a lot of fancy features that make our lives easier. Sadly, all of those additional features also open up the possibility of more ways for the appliance to malfunction.

Luckily, you can troubleshoot and fix the issue yourself. If you’re unsure, it’s always a good idea to call in an expert. Why does my oven keep turning off by itself?

Read: LG Electric Range Problems

Reader Comments (17)

  1. I have a brand new whirlpool oven. Is it normal for the broiler unit to come off and on?
    It doesn’t matter if the door is open or shut.
    It is on for about 3 minutes then off for 1-2.
    I am accustomed to constant, direct, radiant broiling. This is driving me nuts.

  2. I have always had a main oven problem with low temperatures compared to the selection on my Blomberg gas cooker. Just 4 days before Christmas 2021 the oven would not heat up at all and I had no option but to buy another. I decided the Blomberg still seemed a good quality for the price so bought another assuming my old oven temperature control was a one off problem. The new Blomberg initially heated well at the highest setting but lower temperature settings were significantly below temperature and then the oven completely switched off at higher settings. I am thinking about returning this cooker and buying a different model but since manufacturers probably use the same components eg, gas thermostats/thermocouples I am at a loss as to what cooker to buy. I do not want to end up with the same problem. Any advice on which manufacturers use their own components will be appreciated.

  3. My old Jenn-Air D156B from 1991 is having this issue. I have a digital pad to turn the oven on and a knob to set the temperature.

    When I select Bake/Broil/Convection, the oven’s relay switch can be heard and I can set the temperature. The oven acknowledges my request and quickly shows me a default temperature of 140 and “Pre-Bake – ON” as if it’s preparing to heat.

    After 10 seconds, the oven just turns off as if I never set the temp. The relay switch does not click off (it doesn’t click off when I manually turn the oven off either). I turn it back on, set the temp, and after 10 seconds, it shuts off again. Over and over.

    Here’s the tricky thing. I can get the oven started by continuously hitting the Bake/Broil/Convection button and changing the temperature before the oven shuts off on it’s own. So I’m standing there for 10-15 minutes changing the temperature every 5-8 seconds until I finally see the temp reach 145, 150, 155, 160 then I stop changing the temp and the oven remains on.

    I changed the thermostat prong, but that didn’t work. I have a new relay board coming on Monday. Any other thoughts? Wires/connections seem tight.

    What about the control board behind the buttons/knob? Thanks in advance!

  4. I have a 2 year old GE Adora series gas range model JGB720SEJ4SS. While running the bake feature for around 10 minutes, the control board will go blank and the oven will shut off. The stove top burners still work normally. Then after about 10-30 minutes the display will come back on and work as normal.

    I have changed the control board and the oven door gasket which had something spilled on it and seemed to leak oven heat from that area. These both did not solve the issue. I also have tested the temperature sensor, the heating elements, and the cooling fan. All seem to be operating correctly. I ran the steam clean feature on the oven and it seemed to help for a month or so then right back to square one. I have also used compressed air to flush out the vent that sits right below the control board with no luck.

    Now, I did notice that the hot air that vents out right below the control board seems to get the control board a little hot to the touch. It seems as though the control board is overheating and going into a safety feature to protect the oven from catching fire. If it is the ventilation system, I am unsure how to clean it any further. Also, could the temperature sensor test good and still not be functioning properly, such as because it is dirty? Any help is greatly appreciated. Thank you

    • I had this happen to me as well,
      The problem with this model is that the exhaust vent is located not enough out of the control panel, thus causing the control board to overheat.
      You have to figure something to move vent out a little bit.

      • Thank you so much for the reply. It was driving me a bit insane trying to figure it out. The good news is that I picked up a control board for $30, so it didn’t dump a ton of money into it. Hopefully, I can fabricate something to push the hot air out a bit farther or find something online to do to fix that issue. Thanks again!

  5. I have a Siemen unit combination oven.

    When I cook something in fan assisted oven mode, it sometime suddenly switches itself off after a beep after a certain period of time (just now, it was 10 minutes in) . The oven would fall silent, stops cooking, but the timer will continue to countdown.

    I doesn’t always happen though as sometime I have also being able to go a whole 35 minutes without issue on the same setting.

    What could be the most likely cause of the behaviour? I thought it was some kind of fail safe for overheating or something, but the manual points out that the oven is capable to reporting via some error codes, and but while it beeps right before shut down, there are no error code and the timer continues as if the oven is still operating.


    • I would monitor temp using a digital thermometer in order to see the temperature pattern, when it turns on/off, will it keep the temp and so on.. ANd then, trying to figure out what is going on

  6. I am trying to figure out if my oven aWhirlpool 7821ix is shutting of. I suspect the cooling fan. I´m getting a reading of 104 ohm. The temp. sensor is 1080, o good. Thermal fuse is 0,02 ohm so good. Have read another place that the cooling fan should be 280 ohms. I have searched the internet for a wiring diagram that tells the resistance. I have contacted god knows who. No one can tell me what ohms value to look for.

  7. My oven turns off even when we are not using . I would assume its the board because the clock just shuts off like it was unplugged . To turn on i tap on it very easy and it will start again.

  8. Having a problem with a Whirlpool wall mount electric oven. When I open door to check on food the oven just shuts off..
    Thnx Greg

  9. WONDERING if my oven prob is as mentioned here? I tested the temp sensor and it read 1080 OHMS the gas valve test 216 OHMS at each terminal coil. replaced the spark modual board and the oven bake and broil now comes on then shuts off after bout a minute or 2. the flame is a dark deep blue so dont think its a weak igniter it uses a spark igniter electrode in oven. Any adice would be appreciated can a sensor probe test 1080 ohm but still be defective mechanically?

    • This is exactly what resistance should be on the oven probe.
      WHats the model number of your range? You mentioned the spark module, which means there is no igniter on your model. Am I right?

  10. Thank you for this well-written and informative article. As a DIY my challenges are usually appliances other than a stove. Hopefully, with your article and my labor, I can resolve why my new used stove is occasionally rebooting and resetting. BTW I noticed an “I” was missing from the word “install” in the following copy of part of your article toward the end. I am sure a quick login to your site with admin privileges can “fix” the error.

    “You’ll want clear images that give you a good view of where all the screws and connectors go into the control board so that you can instal the new one the same way.”

    I suggest using Grammarly to help with these types of errors we all make. Thank you again for your time and effort.

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