How to Fix Thermador Dishwasher Not Starting? Easy Tips

Encountering a Thermador dishwasher not starting can be frustrating, especially when you’re relying on it for your daily chores.

The quiet hum of your dependable appliance suddenly giving way to silence can be quite the problem.

But before you let the mountain of dishes daunt you or rush to dial a technician, let’s uncover the mysteries behind this common difficulty.

With a touch of DIY spirit and a dash of know-how, you might just have your Thermador humming back to life in no time.

I’ve made a comprehensive guide on all the common issues and their troubleshooting tips regarding the Thermador dishwasher starting problem.

Thermador Dishwasher not Starting

The most common reasons your Thermador dishwasher won’t start are loss of power, faulty control settings, door latch not engaged, insufficient water supply, and internal part failures.

Apart from starting, users also faced issues like the Thermador dishwasher not drying dishes properly.

Troubleshooting Thermador Dishwasher Not Starting

While it’s unsettling to have a Thermador dishwasher not working, the issue is often easier to fix than expected. Understanding the root cause is half the battle.

1. Loss of Power

There’s a particular kind of inconvenience when you’re ready to tackle a pile of dirty dishes, and your Thermador dishwasher stands still.

This silent defiance often stems from a seemingly trivial issue: the dishwasher is not receiving power.

Electrical snags, especially in modern homes with myriad gadgets and appliances, are not rare.

A primary reason could be a tripped circuit breaker that’s playing spoilsport.

How to Fix:

You’ll need to visit your home’s electrical panel to resolve this. Look for the circuit breaker specifically associated with your dishwasher. If it has tripped, you need to reset it to the “ON” position.

However, if electrical setups baffle you or you feel hesitant, always opt for professional help. And a word of caution: safety always comes first.

Never plug or unplug the dishwasher without ensuring no risk involved.

2. Dishwasher Control Settings Issue

In the age of smart appliances, a Thermador dishwasher boasts multiple control settings.

These settings, designed to enhance user convenience, can sometimes backfire if inadvertently altered.

For instance, you might find your Thermador dishwasher stopped working due to something as simple as an activated child lock or a delay start function set unintentionally.

How to Fix:

If you suspect the child lock feature is the culprit, refer to your user manual. It will provide step-by-step instructions for your dishwasher model to deactivate the child lock.

If the issue is the delay start function, you’ll need to reset it.

Press the “Delay Start” button repeatedly until the display showcases “0:00”. This should ideally reset the setting and allow your dishwasher to function as expected.

3. Faulty Door Latch

Thermador dishwasher won't start

A common reason behind your Thermador dishwasher just beeping and not starting is the door latch.

It’s a crucial safety feature ensuring that the machine doesn’t operate with an open door, which would inevitably lead to a watery mess.

How to Fix:

Begin with a simple inspection. Check the door for any items that might prevent it from closing securely. This could be anything from a large dish to a misplaced utensil.

If the door appears clear, but you still can’t secure a latch, the latch mechanism might be the issue.

In such scenarios, considering a replacement is often the best route, preferably with the expertise of a professional.

4. Low or No Water Supply

Without its primary resource, water, a dishwasher is essentially a large drying rack. If your Thermador dishwasher is malfunctioning, it might be due to an insufficient water supply.

How to Fix:

Start troubleshooting your Thermador dishwasher not starting by inspecting the water supply line.

This is often the first point of failure. Ensure there are no kinks or blockages that could hinder water flow. If there are any kinks, it can also result in Thermador dishwasher draining problems.

Also, double-check to make sure the connection is tight and secure. If these seem fine, the water inlet valve, responsible for regulating water flow, might be at fault.

If you’re unsure about its condition or how to assess it, it’s best to call in a professional.

5. Defective Parts

If all common issues are ruled out, and your Thermador dishwasher still doesn’t start, it’s possible that internal components have worn out or malfunctioned.

Key components like the thermal fuse, control panel, or control board are integral for the smooth functioning of the appliance.

Repairing Thermador DIshwasher not starting

How to Fix:

The thermal fuse is a protective device preventing the dishwasher from overheating.

If this fails, your dishwasher won’t spring to life. Similarly, issues in the control panel or board can stall operations.

Given their importance and complexity, it’s challenging to diagnose and fix these problems without expertise. Hence, consulting a professional becomes not just recommended but necessary.


As we’ve explored, the culprits are usually easily identifiable – from a tripped circuit to a faulty latch.

While it’s tempting to panic when your dishwasher won’t start, take a deep breath and troubleshoot methodically.

You can usually have your Thermador up and running with some basic checks and DIY repairs.

However, if the problem persists despite your best efforts, don’t hesitate to call in a professional.

Appliance technicians have the skills and experience to diagnose and fix complex issues in your Thermador dishwasher promptly.

Keep this handy guide to know where to start if your Thermador dishwasher starts malfunctioning.

A bit of preparation and patience can help you easily handle this appliance emergency.

For those with other brands, these guides on the Maytag dishwasher won’t start, and Hotpoint dishwasher stopped working could be insightful.

Steven Settles Author

Steven Settles is an ISCET-certified master in appliance repair. He has aced the National Appliance Service Technician Certification Exam, showcasing his exceptional diagnostic and repair skills. With an in-depth understanding of the latest repair technologies and a keen eye on evolving industry standards, Steven is a go-to expert for any appliance issue.

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