Does your oven heat up and then go cold? Does it switch off in the middle of baking?
If so, you are probably asking a common question: why does my oven keep turning off?
Most electric ovens have built-in safety features. If the oven gets too hot or a part fails, the oven can cut the power to the heating element. Common causes include a faulty temperature sensor, a stuck door switch, a failed cooling fan or a blown thermal fuse.
This easy guide was written by our London repair engineers. It explains the main causes, simple checks you can do at home and when to call a professional.
How Does the Safety Cut-Off Work?
Your oven has safety parts that monitor the temperature inside. If the heat goes above a safe limit, the oven cuts power to the heating element to reduce the risk of fire.
The oven can also switch off if the cooling fan is not working or the control board thinks the door is open. Knowing which safety part has triggered helps you work out what has failed.
5 Common Reasons an Oven Keeps Turning Off
1. A Blown Thermal Fuse
A thermal fuse is a small safety device that blows if the oven overheats. If the cooling fan fails or the air vents are blocked, heat can build up and blow the fuse. Once it blows, the oven will not work until the fuse is replaced.
2. A Faulty Temperature Sensor
The temperature sensor tells the control board how hot the oven is. If it reads incorrectly, the board may think the oven is hot enough and switch the heat off too early, even though the food is not cooked. If your oven also cooks unevenly, read our guide on why your oven is not heating evenly.
3. A Dirty or Faulty Door Switch
The door switch tells the oven that the door is closed. Crumbs or grease can stop it from working properly. The oven may then think the door is open and cut the heat for safety.
4. A Failed Cooling Fan
The cooling fan draws air through the oven to keep the control board and outer parts from overheating. If the fan stops, heat builds up behind the control panel. The oven may then shut down or blow the thermal fuse.
5. A Worn Relay on the Control Board
Small switches called relays on the control board control the power to the heating element. They can wear out with age or be damaged by power surges. With a faulty relay, the clock may keep working while the oven stops heating.
4 Simple Checks You Can Try at Home
Step 1: Turn Off the Power
Safety comes first. Many UK ovens are connected to a cooker switch or the fuse box rather than a plug. Switch the oven off at the cooker switch or fuse box. If it has a plug, unplug it from the wall socket.
Safety warning: Never open electrical panels or touch wiring. Contact a qualified professional for any electrical work.
Step 2: Check the Door Switch
- Open the oven door.
- Find the small switch on the door frame.
- Press it gently with your finger. It should move freely.
- Wipe away any crumbs or grease with a damp cloth, and dry it well.
Step 3: Listen for the Cooling Fan
- Switch the power back on and turn the oven on for a couple of minutes.
- Listen for a fan running at the back or top of the oven.
- If you hear nothing, the fan may have failed.
Do not put your hands near the oven vents while the oven is hot.
Step 4: Look at the Heating Element
- Let the oven cool fully first.
- Look at the metal element at the top or bottom.
- Check for cracks, blisters or dark burn marks.
- If it looks damaged, do not use the oven and speak to an engineer.
Error Codes and Warning Signs
Some ovens show an error code when they shut off for safety reasons. Codes vary by brand and model, so always check your oven manual to see what a specific code means.
Other warning signs include:
- The oven turns off after a set time.
- The oven will not restart after it has cooled down.
- There is a burning smell from the back or the control panel.
- The clock works, but the oven does not heat.
If your clock is also flashing or the display is dark, read our guide on why your oven timer is not working.
How Steam and Power Surges Affect Your Oven
Steam from boiling pans can get into the control panel and cause a short circuit in the door switch or clock board. Power surges can also damage the small relays on the control board. In both cases, the oven may shut off without warning.
When Should You Call an Engineer?
Cleaning a door switch is an easy job. Replacing a thermal fuse or control board needs the right tools and training.
Speak to an engineer if:
- The oven still turns off after you have cleaned the door switch.
- You smell burning plastic near the back or the control panel.
- The cooling fan is silent.
- The oven trips your fuse box. Our guide on why your oven keeps tripping the fuse explains the common causes.
- An error code stays on the screen.
An engineer will use a multimeter to test the thermal fuse, sensor and relays safely.
Frequently Asked Questions
Why does my oven turn off after ten minutes?
This can point to a failed cooling fan or a blown thermal fuse. Heat builds up, and the safety parts cut the power. A faulty sensor can also cause this.
Can a dirty oven make it turn off?
It can contribute. Heavy grease can cause smoke and uneven heat, and blocked vents can make overheating more likely. A thorough clean is worth doing, but it may not fix the fault on its own.
Is it safe to keep using an oven that turns off?
It is best not to. If the oven keeps cutting out, a safety part may be failing. Stop using it until an engineer has checked it.
How long does it take to replace a thermal fuse?
It depends on the model and how easy the part is to reach. Ask your engineer for an estimate when you book.
Need Help With an Oven That Keeps Turning Off?
Does your oven keep switching off, showing error codes or staying cold?
Do not risk ruined meals or a kitchen safety problem. Our local engineers cover all London boroughs and can help with Bosch, Hotpoint, Beko, Samsung, Indesit, Neff and Zanussi ovens. We can replace thermal fuses, sensors, cooling fans and control boards.
If the simple checks have not solved the problem, book a visit for Oven Repair in London and get clear pricing and expert help at your home. Contact our friendly team at London Appliance Repair now.