Miele Dishwasher Error f78

What does this error message mean that my Miele dishwasher displays?

Oh no! A fault has occurred in your dishwasher and now it won't let you use it normally. Well, the truth is, we're here to help you, and since we're experts in error codes, we're going to talk to you a little about this problem affecting your appliance and leaving you with dirty dishes.

The error code F78 on Miele dishwashers indicates a fault in the water circulation of the appliance, specifically in the circulation pump. This pump is essential for the proper functioning of the dishwasher, as it is responsible for pumping water through the sprayers to clean the dishes. If you don't address this problem promptly, you could trigger more serious problems in your precious appliance. If the circulation pump does not work correctly, the dishwasher will not be able to complete the washing cycle and will display this error on the screen.

So that you can understand how to fix this error, first we need to go step by step and understand what causes it. Here is the list of causes we have compiled for you:

• Fault in the circulation pump: The circulation pump may be damaged or blocked by food residues or even by remains of any dishes that may have broken. The impeller of the pump may be damaged or worn, so you need to check that the pump is in optimal working condition.
• Obstruction or blockage in the water circuit: The dishwasher filters may be clogged with food residues or other debris. The water hoses may be bent, twisted, or cracked. The dishwasher sprayers may also be clogged with food residues.
• Communication failure between components: A communication problem between the pump and the PCB electronic board of your dishwasher can trigger this error. So, you'll need to check the internal wiring, connectors, and electronic board.

These are the causes that can lead to this fault occurring in your dishwasher, so it's good that once you know what could be causing the problem, you get to work to fix it.

How can I find a suitable solution for the error code F78 on Miele dishwashers?

We're going to leave you here a list of possible solutions that you can apply to fix this issue and continue using your dishwasher normally. Remember to pay attention to all the details and not skip any of the steps we offer below:

1. Start diagnosing your dishwasher by interrupting its power supply to apply a reset: Turn off the dishwasher completely and deactivate it, then disconnect it from the electrical outlet. This basic step can be important to eliminate faults that may be temporary or errors that do not reflect real problems and are rather false positives, as this procedure resets the system and its sensors. After waiting at least fifteen minutes (15 minutes), reconnect and turn on the dishwasher to check if the error has been corrected. If the issue persists, it's time to consider the following recommendations.
2. For the proper functioning of your Miele dishwasher, it is essential to keep the drainage filter clean and free of obstructions: Locate the filter of your dishwasher and remove it to clean it with a soft brush, warm water, and a little vinegar for cleaning and disinfection. Remove food debris or dirt that may hinder the passage and flow of water. If the filter shows signs of deterioration or breakage, it is advisable to replace it with a new one compatible with your equipment.
3. Make sure the hoses of your Miele dishwasher are in good condition: Check for bends, crushes, blockages, or breaks. Examine and adjust the hoses to avoid obstructions caused by excessive curvatures. If the hoses are crushed by the dishwasher or the wall, correct their position. In case of blockage, try to clear them with a thin wire by inserting it from one end, handling it with caution to avoid piercing the hoses. If the condition of the hoses is poor, consider replacing them with new ones and take the opportunity to replace the seals and connections as well.
4. Check the operation of the circulation pump of your Miele dishwasher: Access the drainage pump, usually located at the base of the dishwasher, and look for possible obstructions. It is common for food residues or broken pieces of a glass or plate to lodge and can disrupt the operation of your dishwasher. Also, check the pump's operation; if you detect anomalies, replace it with a new one suitable for your model of Miele dishwasher. If the filter was in poor condition, it is likely that the pump is also affected and requires your attention.
5. It is important to inspect the electrical system of your Miele dishwasher: Look for signs of wear such as exposed wires, cuts, loose connections, or heat damage. Confirm that the wiring is in optimal condition to operate safely. If you have skills in electronics and a multimeter, it's time to apply your knowledge.
6. As a final measure, inspect the PCB electronic board of your Miele dishwasher: This component of your dishwasher is very delicate and at the same time very important, as this piece is the brain of the entire appliance. A change in electrical voltage or a short circuit may have damaged it. Look at the board for signs of damage, such as burns, flashes, damaged resistors, or deformed capacitors. If you have knowledge of electronics and a multimeter, proceed with a detailed evaluation.
7. If after following the above steps the problem persists, perform a meticulous review of each of them: Check everything again, but this time more carefully and paying more attention to detail. Check the hose connections again, as well as the hoses themselves. Also, check for food residue in the filters and in the water circulation pump. If the problem still persists, then it is very likely that the electronic board of your dishwasher is experiencing serious issues and it would be best to contact the professionals.
8. If the previous actions do not resolve the fault, contact Miele technical support: If you have already tried everything and still have not been able to solve this annoying fault with your dishwasher, then contact Miele's technical support. They have the specialized knowledge necessary to diagnose and repair your dishwasher efficiently, in addition to having the appropriate tools and a good warranty for the repair. Do not let the problem worsen, which could increase the costs and complications of repairing your dishwasher.

To summarize and conclude this guide of tips: We have that the error code F78 on Miele dishwashers indicates a water circulation fault. This problem can have different causes, such as a defective water circulation pump, an obstruction in some part of the water circulation circuit, a communication failure between components, or a problematic electronic board. You can solve this problem by following the steps we have provided in this guide, and that would be all.

Remember that if the problem becomes too complicated for you to solve, you can always turn to Miele technical support to help you solve this problem. Thank you very much for reading us today, and we hope we have been very helpful and useful in solving this problem. Good luck and happy washing!