What is the most expensive part in a dishwasher?

You’ve got a dishwasher that works hard to keep your dishes sparkling clean, but do you know what the most expensive part in it is? Don’t worry, we’ve got you covered. Let’s dive in!

If you need any replacement parts for your appliance, you can enter your model number at AppliancePartsPros.com to order them. Most orders arrive in just two business days, and we have thousands of free guides to show you how to install your new parts.

Important: The information in this article may not apply to your specific appliance model. While we strive to offer helpful advice for all types of appliances, variations in models and configurations can lead to differences in design. For the most accurate guidance, we strongly recommend consulting the use and care manual for your specific appliance model.

What is the most expensive part in a dishwasher?

The control board or electronic control unit is typically the most expensive part in a dishwasher. It manages all the dishwasher’s functions, such as the wash cycles, water temperature, and the timing of the washing and drying processes. Depending on the brand and model, a control board replacement can cost anywhere from $150 to $400 or more.

Other potentially expensive components include:

• Pump and motor assembly: Responsible for circulating water and can cost $100 to $350.
• Heating element: If the dishwasher has a built-in drying function, the heating element, which dries the dishes, can cost $50 to $200.

However, the control board tends to be the priciest due to its complexity and critical role in operating the dishwasher.

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Functions of a control board

The control board, also known as the main electronic control board or motherboard, is the brain of an appliance like a dishwasher, range, or other household devices. It manages and controls the key functions and processes by sending signals to various components to ensure everything operates in the correct sequence and at the right times.

1. Timing and control: It controls the timing of operations, such as when to fill, drain, heat, and dry (in a dishwasher) or adjust temperatures and settings (in a range or oven).
2. Communication between parts: The control board sends and receives signals from other components like sensors, motors, and heating elements, ensuring that each part operates correctly.
3. Cycle selection: It allows the user to select different modes or cycles (e.g., heavy wash, delicate, self-clean) and manages the process based on the selected settings.
4. Error detection: The control board can also detect malfunctions in other components and may display error codes to help with troubleshooting.

Signs of a faulty control board

• The appliance won’t turn on or respond to inputs.
• Cycles don’t complete, or the appliance stops working mid-cycle.
• Error codes or lights flashing on the control panel.
• Inconsistent operation, such as incorrect water levels, heating issues, or non-responsive controls.

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Can I replace the control board myself?

Yes, you can replace the dishwasher control board yourself with a basic understanding of appliance repair and careful attention. The control board replacement is a manageable DIY task if you are comfortable working with electrical parts and have some basic household tools. Here’s a general guide on how to do it in 10 easy steps:

1. Unplug the dishwasher or turn off the power at the circuit breaker.
2. Open the dishwasher door and use a screwdriver to remove the screws holding the inner door panel in place.
3. Once the panel is removed, you should be able to access the control board, which is usually mounted behind the control buttons or touchscreen.
4. Before removing the old control board, take a picture or make a note of how the wires are connected to it so that the new board can be installed correctly.
5. Carefully disconnect the wires connected to the old control board. Use needle-nose pliers if necessary.
6. The control board is typically secured with screws or clips, so use the appropriate tool to remove it.
7. Position the new control board in place and secure it with screws or clips.
8. Reconnect all the wires according to the notes or photos you took earlier.
9. Once the new control board is installed, reattach the inner door panel by screwing it back into place.
10. After reassembling the dishwasher, restore power by plugging it back in or turning the breaker back on.

How long does a dishwasher control board typically last?

A dishwasher control board typically lasts 7 to 10 years under normal use, which is in line with the average lifespan of most dishwashers. However, several factors can influence the longevity of the control board, including:

1. Quality of the appliance: Higher-end models with more advanced designs may have control boards that last longer due to better construction and materials.
2. Frequency of use: If the dishwasher is used frequently (multiple times per day), the control board may experience more wear and tear, shortening its lifespan.
3. Environmental factors: High humidity, power surges, or electrical issues can impact the control board and lead to premature failure.
4. Maintenance and care: Regular cleaning and careful use of the dishwasher can prevent damage to the control board, helping it last longer.

While control boards are designed to last the entire life of the dishwasher, they are susceptible to failure, especially if exposed to frequent power fluctuations or other electrical problems. If your dishwasher is nearing or surpassing the 10-year mark, the control board or other components may start showing signs of needing to be replaced.

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Additional information

Thanks for reading! If you need replacement parts for any of your appliances, check out AppliancePartsPros.com, where you can enter your model number to find exactly what you’re looking for. Most orders arrive in two business days, and we have thousands of free resources to show you how to install your new parts.

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