Skip to Content

AEG Oven Not Heating Up: Here’s Why and How to Fix It

The most common reason why your AEG oven is not heating up is a faulty heating element. If your oven is experiencing this issue, replacing the heating element should resolve it. However, there are other possible causes that may prevent your AEG oven from heating up, such as a digital clock that is not set, poor installation, a broken door seal, a demo mode activated, or a tripped fuse/RCD. If you require assistance, it is recommended to contact a professional.

AEG Ovens have a reputation for durability, but heating issues are common. I’ve used an AEG built-in oven for many years and encountered a heating issue quite a bit. The most common cause for me was the failing power supply (120V/240v). 

I deeply understand how these AEG ovens work, and rest assured; you have nothing serious to worry about. In this troubleshooting guide, I’ll share simple DIY fixes to help you identify and fix problems that could cause your oven to stop heating. These guides will work for built-in, double, and compact ovens.

Let’s explore all the possible reasons why your AEG oven won’t heat up and quick DIY fixes to get you back to cooking again as soon as possible.

AEG Oven Not Heating Up: Here’s Why and How to Fix It

What to Check if Your AEG Oven Doesn’t Heat Up?

Let’s cut to the chase. Here are the exact troubleshooting steps you should take if your AEG oven doesn’t heat up:

  • Check Oven installation
  • Set digital clock
  • Investigate door seal
  • Deactivate demo mode
  • Replace faulty fuse/RCD
  • Check for a faulty fan element
  • Investigate the thermostat

We’ll take an independent look at each of these fixes.

Check that Your Oven was Correctly Installed

Poorly connected oven wires are common problems with hasty AEG oven installations. If your oven was recently installed, then it’s likely that shaky wires are responsible for the heating issues. But if your oven’s been working for a while before today’s heating issues, feel free to skip this step — although I’ll still recommend checking the wire connections (just in case).

Nothing to worry about; there is an easy fix for this. All you’ll need is a set of screwdrivers, like this CRAFTSMAN Screwdriver Set.

How to Fix a Poor AEG Oven Installation

  1. First, disconnect your oven or switch it off at the switchboard.
  2. Unscrew the screws that are holding the oven in place. They should be located around the rim of the oven cavity once you open the door.
  3. Remove the oven from the frame and put it on a sturdy work surface nearby.
  4. Unscrew the back panel to reveal the wiring underneath.
  5. Check that all of the wires are connected properly. If not, clip the connectors back onto the oven and make sure they are secure.
  6. Screw the back panel back into place, put the oven back into its frame, and secure it with the screws on the front of the oven.

Still not heating? Check that the power supply is up to the required 240V for your electric AEG Oven. Also, confirm that your power cable and socket actually work. 

If this doesn’t seem to be causing the problem, there are other things you can try.

Set Digital Clock

Newer designs of the AEG ovens come with digital clocks. If your newly installed device has a digital clock, check that the time is set.

The numbers (00:00 or 12:00) displayed on your LED confirm that your clock was not set after installation. Power cuts are also known to reset the time on your clock. So after a power cut, check that your LED timer is set to the desired value.

If your clock is not set, here is AEG’s official video guide to setting the digital clock on your oven.\

Replace the Door Seal

If the clock is not responsible for the heating issue, your AEG oven’s door seal could be the culprit. AEG ovens are programmed not to heat up when the door is not completely locked for safety reasons. Therefore, a damaged door that doesn’t lock completely will prevent your oven from heating.

Also, a worn-out or damaged door seal can cause a loss of hot air inside your oven, which means it won’t heat up enough to cook your food efficiently. 

Luckily, this is a relatively simple thing to fix.

How to Replace a Faulty AEG Oven Seal

  1. Disconnect your oven from the power source.
  2. Open the oven door to expose the seal. It will be sitting around the rim of the oven cavity.
  3. Gently pull out the door seal, starting with one of the corners. Work your way around until you’ve removed the seal completely.
  4. Wipe down the groove with a wet cloth or a sponge to remove dirt. Let the groove dry before installing the new seal.
  5. Install the new seal by lining up one of the corners to the groove on the oven rim and pressing it down firmly to secure it in place. Do so around the rim until your new seal is completely in place.

If you’re still unsure how to do this, you can watch this video that explains the process of replacing your seal.

Deactivate Demo Mode

If your oven seal is not responsible for the heating, check that your oven is NOT in demo mode.

Oven demo mode is an oven feature that allows retailers and manufacturers to showcase the oven’s capabilities (features and functions) in a showroom. Your AEG oven won’t heat up if demo mode is activated. Demo mode is indicated when the oven’s LED shows “Demo” or “d.”

To resolve the heating issue, all you have to do is deactivate the demo mode. Here’s how to deactivate demo mode on AEG ovens.

Check for a Faulty Fan Element

The fan element in your AEG oven is responsible for radiating heat and circulating hot air within the oven to ensure even cooking. 

Here’s how to determine if your fan element is responsible for the heating issue before you go replacing it:

  1. Set it to a high temperature.
  2. Wait 10-15 minutes for the oven to reach the set temperature.
  3. Open the oven door and look inside. If the fan is not spinning, this is a clear indication that the fan element is not working.
  4. If the fan is spinning, but the oven is still not heating up, perform a simple visual check of the fan element. Turn off the oven and unplug it from the power source. Remove the back panel of the oven to access the fan element. Look for any signs of damage, such as cracks or burn marks. Damage indicates that the fan element is faulty and needs to be replaced.
  5. Fan element looks fine? Use a multimeter to test it for continuity. Set the multimeter to the continuity setting and touch one probe to each end of the fan element. No continuity indicates that the fan element is faulty and needs to be replaced.

Call a professional, or follow our simple DIY guide to replace our oven fan element:

How to Replace a Faulty Oven Fan Element

  • Switch off the power supply to your oven before starting.
  • Remove the oven door. Open the door all the way to expose the hinges. Pull back the clip on each hinge to unlock the door from the hinge. Close the door about halfway and slide it away from the oven.
  • Remove the oven shelves and shelf racks to gain access to the backplate.
  • Unscrew and remove the backplate to expose the fan element.
  • Unscrew the screws that hold the element in place and carefully pull the element into the oven cavity.
  • Note how the wires are connected to the element before disconnecting them. You can do this by taking a photo or making a note on a piece of paper.
  • Disconnect the wires from the element by pulling gently on the connectors. You can now remove the old element and set it aside.
  • You can now reattach the wires to your replacement element and screw the element back into place. Replace the backplate and secure it. Put the shelves and shelf racks back into the oven cavity and reattach the door, remembering to clip the hinges back into place.

To help you understand this process, here’s a video that explains how to replace your oven’s fan element:

Replace the Thermostat

If your oven heats up but not to the correct temperature, your thermostat is broken and needs to be replaced. You’ll need a set of screwdrivers and a new thermostat to replace the old one.

How to Replace a Faulty Oven Thermostat

  1. Disconnect your oven from its power supply to ensure you don’t electrocute yourself.
  2. Remove the door to make removing the oven easier. You can do this by unclipping the hinges on the door, closing the door about halfway, and pulling the door away from the oven.
  3. Remove the shelves from inside the oven to stop them from falling out when you move the oven.
  4. Unscrew the screws keeping the oven in place, as you’ll need to remove the oven from its frame to access the back. These screws can be found by opening the oven door and looking around the oven cavity’s rim.
  5. Once you’ve removed the screws, you can slide the oven onto a sturdy surface nearby. You might need to ask someone to help you, as the oven can be quite heavy.
  6. Unclip the capillary tube at the very back of the oven cavity.
  7. Unscrew and remove the oven’s top panel. Remember to note how the wires are connected to the thermostat for later reference.
  8. Gently pull the capillary tube out through the roof of the oven.
  9. Remove the temperature control knob at the oven’s front, using a flathead screwdriver to gently pry it away from the oven.
  10. Unscrew the screws holding the thermostat in place from the front of the oven.
  11. Now you can simply pull the thermostat out and disconnect the electrical wires.
  12. Install the new thermostat by threading the capillary tube back into the oven cavity and clipping it.
  13. Reconnect the electrical wires to the new thermostat in the same order you removed them, put the thermostat back into place and screw it in to secure it, and then replace the temperature control knob.
  14. Screw the top panel back into place, replace the shelves, and reattach the door. Make sure you clip the hinges back into place to secure the door properly.

Watch this video to understand better how to replace an oven thermostat quickly and easily.

Replace faulty fuse/RCD

Fuses can trip for various reasons, including damaged cables, water damage, improper installation, overloaded circuits, and more. Check whether the fuse or RCD has tripped if your AEG oven’s LED display is blank/dark.

Replacing a faulty fuse or RCD is not a DIY activity. Instead, book a technician to get the job done. Learn more about oven trip fuses or oven blows here.


This article provides a detailed list of 7 possible reasons why your AEG oven isn’t heating up and easy ways to fix these issues. If you aren’t completely comfortable doing these repairs yourself, call a professional.


  • Hunter Hayes

    Hunter Hayes is a seasoned wordsmith with an obsession for all things related to Home Improvement. With years of experience in the subject, he brings to a unique blend of technical understanding and approachable writing. Hunter's articles not only explain complex thermodynamic ideas, but they also provide practical advice for day-to-day temperature management. Hunter's intelligent contributions will keep you well-informed and comfortable in every circumstance, whether you're intrigued about climate science or looking for help on optimising your home's HVAC system.

As an Amazon Associate, we earn from qualifying purchases. We may also earn commissions if you purchase products from other retailers after clicking on a link from our site.