Miele dishwashers are some of the best dishwasher brands on the market. Before they end up in your home, the manufacturers put each unit through a tough endurance test to ensure you have a durable machine that will clean your dishes for many years to come.
Yet, in real life, even the toughest appliances are not immune to occasional breakdowns. It is frustrating when that happens, and to save you from tearing your hair out; we give you this article to help you figure out why your Miele dishwasher is not heating.
Generally, when your Miele dishwasher is not heating, you will need to inspect two parts that are most likely causing this problem, the heating element and the thermostat.
The heating element is what heats the cold water that enters the dishwasher. It is a metal, tubular structure that allows water to pass through it and absorb the heat from the metal. When the water does not heat, it could be because something went wrong with the heating element, and it does not give off sufficient heat to let the water warm up to the correct temperature.
The thermostat controls when the heating element turns on or off. When this part is faulty, the heating element may not get the message to start heating up and remain cold for the duration of the wash cycle. So, even though the thermostat is not directly involved in heating the water, it plays an important role, and you need to make sure it works correctly.
Reasons Why Miele Dishwasher Does Not Heat Up
The dishwasher relies on heated water sprayed under pressure to remove grease and leftover food from your dishes as it cleans them. The heat from the element also dries the dishes during the wash cycle. The typical sign that your dishwasher is not heating up will be dishes that are not thoroughly clean and damp after the washing cycle is complete.
The most common reasons your Miele dishwasher does not heat up are usually faulty heating elements or your thermostat could have stopped working. Another reason could be that your Miele is plumbed into the hot water supply, and the water filling the dishwasher is too hot.
There are various reasons why the Miele dishwasher is not heating. The dishwasher will not heat up when the heating element or the thermostat are damaged. Another reason may be that your dishwasher is plumbed into the hot water supply, and the water running into the dishwasher is too hot and exceeds the maximum temperature set for the model of your dishwasher. When the dishwasher detects that the water temperature is already high as the dishwasher fills, it may cause the cycle to shorten and result in incomplete cleaning of the load.
Things To Try To Fix Miele Dishwasher Not Heating
The heating element in your Miele dishwasher is usually a relatively reliable component. Still, it can burn out, or there may be a fault in the wiring that connects it to the electricity supply. The same is true for the thermostat. Unfortunately, when these parts break, they cannot be fixed and must be replaced. The good news is that you can do the replacement yourself with a set of simple tools.
All models of dishwashers have a heating element. It may be a coil-like structure fitted inside the dishwasher cavity, or it may be a flow-through tube situated inside the panels. To locate yours, you will need to consult the instructions guide that came with the dishwasher or look for it online.
To try to fix the problem of your Miele dishwasher not heating, you can replace the faulty heating element or the thermostat. You should also try to check your machine’s water supply to ensure there are no issues elsewhere.
When diagnosing if the heating element is not working, use the multimeter to test the resistance. The reading should be between 15 and 30 ohms. If your reading is above 30 ohms, it means that your element needs to be fixed, not that it is working extremely well. (Just saying) You will need to purchase a new element and replace it. One thing to note is that once you replace the new element, you may need to run a diagnostic cycle on your machine to reset it and ensure that the power is activated.
If you suspect the thermostat is the culprit, you will need to do the same here. Test the thermostat with the multimeter to determine that it is the cause of the fault. If it is, you will need to buy a new thermostat and replace it. The difficulty here lies in the location of the thermostat. It is situated underneath the dishwasher, and accessing it can be complicated.
While you are checking the heating element and the thermostat, don’t forget to examine the wiring for any corrosion or breaks. Also, check all corresponding fuses. It may be that the element and thermostat appear to be not functioning, but the fault lies with the wiring, which theoretically is more likely to get damaged and cause issues.
If you find that both the heating element and the thermostat work fine, the trouble may be with the water supply. Most dishwashers are plumbed into the cold water supply and heat up the water internally. However, the newer, energy-efficient models allow plumbing into the hot water supply to save on the energy needed to heat the water from cold to the required temperature.
The main advantage of a dishwasher is that your dishes are cleaned at a temperature that is too hot for human hands. The dishwashers that use hot water to fill them still have an element to heat the water to the required temperature because they were designed to clean dishes with very hot water. However, if you fill the dishwasher with hot water, it will be more difficult to tell that the heating element does not work because the dishes will still be warm when you open the dishwasher. Even if the correct washing temperature was not reached.
To troubleshoot correctly, whether the fault lies with the heating parts or elsewhere, run the dishwasher at the hottest cycle to check that it can heat the water to the correct temperature.
Another point to note is that when you use hot water to fill your dishwasher, you must ensure that the water entering your machine is not too hot. Consult the operating instruction manual to determine the recommended maximum water temperature.
Suppose your geyser warms up the water to a temperature higher than the recommended temperature in the guide. In that case, it may be that your dishwasher detects water that is too hot and automatically shortens the washing cycle. The shorter time the dishes are exposed to the streaming hot water may be insufficient to completely remove dirt and grime, resulting in dirty dishes after the washing and drying cycle is done.
Dishwashers are convenient appliances that hygienically clean your dishes. So when your Miele dishwasher not heating (how to fix) problem happens in your household, you will be prepared on how to deal with it efficiently.
ReadyToDIY is the owner of this article. This post was published on 2022-12-20.