Dishwasher Thermostat

A dishwasher thermostat is a device that regulates the water temperature in a dishwasher. It is usually located near the bottom of the dishwasher, near the water inlet. The thermostat has a sensing element that monitors the water temperature and controls the heating element to maintain the water temperature at the desired level. Dishwasher thermostats are designed to maintain a water temperature between 120 and 140 degrees Fahrenheit.

What is a Dishwasher Thermostat and What Does It Do?

A dishwasher thermostat is a device that regulates the water temperature in a dishwasher. The thermostat is located in the control panel of the dishwasher and is usually adjustable. The ideal water temperature for washing dishes is between 120 and 140 degrees Fahrenheit.

The thermostat in a dishwasher controls the heating element, which is responsible for heating the water. If the water temperature gets too high, the thermostat will turn off the heating element to prevent the water from getting too hot.

The Anatomy of a Dishwasher Thermostat:

A dishwasher thermostat is a vital component to the dishwashing process. There are three main parts to a dishwasher thermostat: the heating element, the bimetallic strip, and the temperature control knob. The heating element is responsible for heating the water to the desired temperature.

The bimetallic strip is a metal coil that expands and contracts with changes in temperature. This expansion and contraction allows the bimetallic strip to act as a switch, turning the heating element on and off as needed. The temperature control knob is used to set the desired water temperature.

The dishwasher thermostat is a simple yet essential part of your dishwashing machine. By understanding how it works, you can ensure that your dishes come out clean and streak-free every time.

How Dishwasher Thermostats Work?

Dishwashers use thermostats to regulate water temperature and ensure dishes come out clean. But how does a dishwasher thermostat work?

A dishwasher thermostat is a simple device that uses a bimetallic strip to measure the water temperature. The bimetallic strip is made of two different metals that expand at different rates when heated. As the water in the dishwasher heats up, the bimetallic strip bends and activates the switch that controls the heating element.

The heating element then kicks on and brings the water up to the desired temperature. Once the water reaches the right temperature, the bimetallic strip cools down and returns to its original shape, which turns off the heating element.

This process repeats throughout the cycle to make sure your dishes come out clean and streak-free every time.

Common Problems with Dishwasher Thermostats:

A dishwasher thermostat is a key component to the dishwashing process, as it regulates water temperature. However, there are several common problems that can occur with dishwasher thermostats.

One of the most frequent issues is that the dishwasher thermostat may not be accurate. This can cause water to be either too hot or too cold, which can lead to dishes not being properly cleaned. Another common problem is that the thermostat may become stuck in one position, causing the dishwasher to either overheat or underheat the water.

Other less common but still problematic issues that can occur with dishwasher thermostats include wiring problems and corrosion. Wiring problems can cause the dishwasher to malfunction altogether, while corrosion can lead to inaccurate readings and eventually failure of the device.

What are The Symptoms of a Failing Dishwasher Thermostat?

If your dishwasher isn’t running as efficiently as it used to, or isn’t getting your dishes as clean as it used to, it may be due to a failing thermostat. Here are some signs that your dishwasher thermostat may be failing:

  • Your dishwasher doesn’t seem to be heating up water as well as it used to. This is because the thermostat isn’t accurately regulating the water temperature.
  • You may notice that your dishes aren’t getting as clean as they used to, even if you’re using the same detergent and cycle settings. This is because a lower water temperature means that the detergent isn’t as effective.
  • Your dishes may also come out wetter than usual, even on the highest heat setting.

Tips For Troubleshooting Dishwasher Thermostats:

If your dishwasher isn’t heating up water like it used to, there are a few things you can check before calling a repairman. First, make sure the thermostat is set to the correct temperature. If it’s not, adjust it and see if that solves the problem.

If the dishwasher still isn’t heating water, check the heating element to see if it’s working properly. You can do this by testing it with a multimeter. If the element is broken, you’ll need to replace it.

Finally, if neither of these solutions works, you may have a problem with your dishwasher’s control board and will need to call a repairman.

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How To Test a Dishwasher Thermostat?

If your dishwasher isn’t properly washing your dishes, it could be a problem with the thermostat. Testing the dishwasher thermostat is a relatively simple process that you can do at home.

Step 1:

To test the dishwasher thermostat, you’ll need a multimeter. First, locate the thermostat on your dishwasher. It will typically be located near the heating element. Once you’ve found it, disconnect the wires from the terminals.

Step 2:

Next, set your multimeter to the Ohms setting and touch one probe to each of the terminals on the thermostat. The reading should be somewhere between 50 and 200 ohms. If it’s outside of that range, then the thermostat is likely malfunctioning and will need to be replaced.

How do I test my dishwasher thermostat with a multimeter?

To test your dishwasher thermostat with a multimeter, first make sure that the power to the dishwasher is turned off. Then remove the thermostat from the dishwasher and connect the leads of the multimeter to the thermostat terminals. Set the multimeter to the ohms setting and check for continuity. If the reading on the multimeter is infinite, then the thermostat is open and needs to be replaced.

Where is the thermostat located on a dishwasher?

The thermostat is located on the control panel of the dishwasher. It is usually near the top of the control panel, near the edge of the dishwasher door.

How do I reset my dishwasher thermostat?

There are a few ways to reset your dishwasher thermostat. One way is to unplug the dishwasher from the power outlet and then plug it back in. Another way is to press and hold the “Start” button for 3 seconds.


Dishwasher thermostats are an important part of dishwashers. They help to regulate the water temperature and prevent dishes from overheating. When shopping for a new dishwasher, be sure to check the thermostat rating to ensure that it will meet your needs.

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