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Thermador oven not heating

Is Your Thermador Oven Not Heating? This May Be Why…

A high-end Thermador oven provides superior cooking power, but that doesn’t mean it’s exempt from common heating issues. Why won’t my Thermador oven heat up? There could be a number of causes for this complex question. Learn how to troubleshoot the common reasons for a Thermador oven not heating so you can quickly solve the problem.

FAQs for a Thermador Oven Not Heating Correctly

If you’re the proud owner of a Thermador oven, the last thing you want to experience is it not heating up. It can be a frustrating and potentially costly problem, but the good news is that it is often a simple fix. In this troubleshooting guide, we will explore the most common reasons why an oven may not be heating and provide solutions to get your oven back up and running in no time. From troubleshooting a malfunctioning igniter to checking the thermostat, we’ll cover all the bases to ensure you can get your oven back to its optimal performance.

Thermador oven isn't heating
Image Source: Thermador

Why Is My Thermador Oven Not Turning On?

There are several reasons why an oven may not turn on. One possible cause is the oven door switch, which may prevent the oven from turning on.

To troubleshoot the oven door switch to see if it is causing the oven not to heat up, you can follow these steps:

  1. First, unplug the oven from the power source and make sure the door is closed.
  2. Locate the oven door switch, which is typically located near the hinge on the oven door frame.
  3. Using a multimeter, test the continuity of the door switch by setting the multimeter to the continuity setting and touching one probe to the common terminal of the switch and the other probe to the normally open terminal. If the switch is working properly, the multimeter should beep, indicating continuity.
  4. If the continuity test shows that the door switch is not functioning properly, it may need to be replaced.
  5. If the door switch is working correctly, it’s possible that the problem may lie elsewhere in the oven, such as with the control board, thermostat, or heating element.
  6. It is important to note that this is just a basic troubleshooting process, and it is always recommended to consult the manufacturer’s instructions or a professional oven repair technician to fix the issue.

Why Does My Oven Turn On but Not Heat Up?

When your oven is turned on but is not heating up, it may be due to a malfunctioning igniter. The igniter plays an important role in heating the gas that powers the oven, and if it is not functioning properly, the gas will not ignite, resulting in no heat.

To troubleshoot your oven igniter:

  1. Before troubleshooting your oven igniter, ensure your oven is disconnected from any power source.
  2. To check an oven igniter, you will need first to locate it within the oven. It is typically located near the burner assembly at the bottom of the oven.
  3. Once you have found the igniter, you should visually inspect it for any signs of damage, such as cracks or breaks.
  4. You can also test the igniter to see if it is functioning properly. One way to do this is to use a multimeter to check for continuity in the circuit.
  5. To do this, set the multimeter to the continuity setting and then touch one lead to the end of the igniter wire and the other lead to the other end of the wire.
  6. If the multimeter beeps or the reading shows continuity, the igniter is working.
  7. If the multimeter does not beep or there is no continuity, the igniter is not working and will need to be professionally replaced.

Why Is My Thermador Oven Not Heating Up?

Why is my oven not heating up, you may ask? There could be several reasons. A common one is a faulty igniter that can’t light the gas, hence no heat. Another possibility is a thermostat that’s not doing its job, preventing the oven from reaching the desired temp. Or it could be an issue with the control board not sending the right signals to the heating element. Even the heating element itself could be damaged or not working. Occasionally, debris clogged in the oven could also be the problem. Also, as a rule of thumb, avoid using the self-cleaning feature on your oven, as it can cause significant damage to its components. However, to find the root cause of your oven not heating up, it’s best to call a professional oven repair technician.


thermador oven not heating
Image Source: Thermador

What Are the Most Common Reasons for a Thermador Oven Not Heating?

The most common reason for an oven not heating is a malfunctioning igniter. The oven’s igniter is responsible for heating the gas that powers the oven, and if it is not functioning properly, the gas will not ignite, and the oven will not heat up. Other potential reasons for an oven not heating could be related to a faulty thermostat, a malfunctioning heating element, a power issue, a faulty bake element, a blown fuse, or an issue with the oven’s control board. It’s important to troubleshoot or consult a professional to determine the exact cause of the issue before attempting to fix it.

Let’s review some of the most common causes for a Thermador oven not heating correctly and their possible solutions.

Oven Thermostat Needs Adjustment

Both gas and electric ovens have a thermostat that monitors the oven’s set temperature, signaling for more or less heat to maintain it. If your oven isn’t heating to your expectations, it’s possible the thermostat needs adjusting to maintain your temperature settings. While the thermostat may also be faulty, this rare occurrence isn’t likely.

Refer to your Thermador user manual to determine how to adjust the thermostat on your model oven. It can typically be adjusted in 5-degree increments to reflect your cooking and timing preferences better.

Thermador Oven Power Issue

Are you experiencing Thermador problems with your oven? Sometimes a power issue, not an oven problem, maybe why an oven is not hot. Even gas ovens require electricity to ignite and power the control panel.

Here’s how to make sure your oven is receiving sufficient power:

  • Check the power cord: Make sure it’s damage-free and fully plugged in.
  • Test the outlet: Use a multimeter to make sure the outlet is delivering the proper voltage.
  • Avoid extension cords: These cords can’t reliably transmit the voltage an oven requires, resulting in surges that interrupt power.
  • Look for tripped breakers or blown fuses: Check your home electrical panel, replacing blown fuses or resetting tripped breakers.


thermador problems

Burnt Out Bake Element

Electric ovens get their heat from two heating elements at the top and bottom of the oven. When the wiring in each element receives electrical current, it produces heat, and the element glows with a steady, red hue. If your Thermador oven is not heating evenly, with food remaining underdone on the bottom, the bake element may be burnt out. Other visual signs include blistering, breakage, or dark spots on the element itself.

Multimeter testing of the bake element can confirm that it’s burnt out by showing a lack of continuity. In this case, the bake element must be professionally replaced.

Thermal Fuse Is Blown

Is your oven not heating up at all? It’s possible the thermal fuse has blown. This valve acts as a safety device and will blow if the oven is in danger of overheating. However, more commonly, the fuse will blow if it’s faulty. Once the fuse has blown, the oven won’t be able to heat up at all.

Confirm that the fuse has blown by testing it with a multimeter. If it shows no continuity, it can’t be repaired and must be replaced.

Faulty Thermador Oven Temperature Sensor

An oven temperature sensor, or temperature probe, is like your oven’s thermometer. It’s a small metal rod with a wire that measures the temperature inside the oven and sends the information to the control board. The control board then uses this information to adjust the heating element and keep the oven at the desired temperature. The temperature sensor is usually located near the back of the oven, inside the oven cavity, and connected to the control board with a wire. But if it’s not working properly, it can cause the oven not to heat up or overheat. If you suspect your oven temperature sensor is faulty, you may need to have a professional diagnose and replace it.

Faulty Thermador Oven Control Board

If the above reasons aren’t responsible for your oven’s heating issue, it’s possible that the oven control board is faulty. This computerized board governs all oven operations, responding to your control panel commands and sending voltage to the appropriate function. If the control board is faulty, it won’t respond to commands, and the oven won’t heat up. 

A faulty control board can’t be repaired and, given its complexity, should be replaced by a professional oven repair service.

The technicians at Dependable Repair Services can fix a Thermador oven, not heating, range burners not lighting, or any cooking appliance issue. Schedule your expert service today!

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