Thermador Oven Not Heating: 7 Troubleshooting Steps to Fix This Heating

There are several reasons why your Thermador oven not heating up, including a broken thermostat, a malfunctioning power source, issues with amperage, or defective oven components. 

To start fixing this problem, make sure the power supply for the gas and electric Thermador ovens is 120V and 240V, respectively.

Call a professional or use the instructions in this guide to find and repair any damaged parts if this doesn’t fix the heating issue. 

Key Takeaways

Expert Guide

Thermador Oven Not Heating

There is typically a simple reason why a Thermador oven not heating up properly, even if it could seem like a deal breaker. Find the best solution for anything from blown thermal fuses to power problems. 

1. Issues with the Power Supply

Before looking into a problem, make sure the power supply is in your oven. An electric oven may not heat up correctly due to several power-related problems.

Here’s how to evaluate issues with the power supply:

• Examine the outlet: For proper electricity, electric ovens need a 240V outlet. Verify that the oven is plugged into the appropriate outlet. If you think the outlet isn’t functioning correctly, you might need to test it using a multimeter.
• Check for tripped breakers: Verify that the circuit breaker box in your house is free of tripped breakers, which could knock out the oven’s electricity.
• Avoid using extension cables: These cords can’t securely carry the power levels the oven demands.

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2. Element of Broken Bake

The element in charge of producing the heat required for cooking is your oven’s bake element.

As electric current passes through it, it heats up to achieve this. Inappropriate heating can result from a broken or damaged baking element that stops the current flow.

With a visual check, troubleshooting a broken bake element can be rather simple. The element is not heating correctly if, when the oven is turned on, the baked element does not glow red with heat. 

The heating element may potentially be malfunctioning if it has dark patches or holes in it. It will be necessary to replace a damaged component.

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3. The oven either doesn’t start or shuts off right away

The oven may be getting enough electricity from the plug. It wouldn’t start at all, or if it did, it would shut off right away. Regardless, it will be incapable of heating up.

How to Fix a Non-Starting Thermador Oven

You must properly close the oven. Issues could arise if the door is unable to close.

What you can do is as follows:

• Verify that the door is shut.
• If you are unable to close it correctly, check for crumbs and other items that might be stuck to the edges or corners. They could prevent the door from shutting.
• Clear away any crumbs or other debris.
• Turn off the oven.

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4. Faulty Igniter

A broken igniter could be the cause of your oven not heating up even after turning it on. The gas that drives the oven depends on the igniter to ignite; if it isn’t working correctly, the gas won’t ignite and won’t produce any heat.

To diagnose the igniter in your oven:

• Make sure your oven is unplugged from all power sources before attempting to troubleshoot the igniter.
• You must first find the oven igniter within the oven to inspect it. You can find it at the bottom of the oven, next to the burner assembly.
• After locating the igniter, visually check it for any indications of damage, including cracks or breaks.
• To check if the igniter is operating correctly, you can also test it. To check for circuit continuity, one method is to use a multimeter.
• Use the multimeter’s continuity setting and touch one lead to the igniter wire’s end and the other lead to the wire’s other end to accomplish this.
• The igniter is operating if the multimeter beeps or the measurement remains constant.
• if the multimeter does not beep or if there is no continuity, then you have a broken ignitor and you need to change it. 

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5. Issues with Circuit Amperage

A circuit’s amperage is the amount of electric current flowing through it. When a double Thermador oven has circuit current issues, the second oven can not heat up correctly. There won’t be enough amperes or it won’t match the house circuit as it should.

How to Adjust an Oven’s Circuit Amperage:

Issues with circuit current may result from a vent blockage.

This is what you need to do:

• Examine the vent aperture on your oven.
• Take out the obstruction if there is one.
• Verify that your oven is operating properly.
• Consult a professional if the issue isn’t fixed.

6. Temperature Sensor

The temperature sensor measures and regulates the oven’s temperature. To maintain the proper temperature, it communicates with the control board to turn the heat on and off.

Incorrect signals from a malfunctioning temperature sensor may cause the oven to heat improperly or not at all. You can test and replace a malfunctioning thermostat on a Thermador oven yourself.

Here’s how:

• Unplug the oven.
• Find the sensor for the temperature. It typically protrudes through the oven cavity’s back panel and resembles a slender metal rod.
• Take off the screws holding it to the rear panel.
• Remove the temperature sensor and expose the electrical harness. Take it out of the wiring harness.
• To check the resistance of the sensor, use a multimeter that is set to ohms.
• The measurement should be between 1000 and 1100 ohms at normal temperature. If this is not the case, replace the sensor.
• Heat the sensor using a hair dryer or heat gun. This should cause the multimeter’s reading to rise. Get a new sensor if it doesn’t rise.

7. Blown Thermal Fuse

A blown thermal fuse is a typical oven issue that can cause a lack of heat. The purpose of the thermal fuse is to keep the oven from overheating. 

If it happens, the fuse will trip, turning off the oven’s electricity. Usually defective, a blown fuse will also cause the oven to lose power.

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By using a multimeter to check for continuity, you can ascertain whether the thermal fuse has blown. It is best to replace a blown fuse since you can not fix it. 

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