Miele Dishwasher Troubleshooting Guide: Problems, Solutions & Error Codes
If you own a Miele dishwasher you know you have a great piece of engineering and technology. Miele has a great name within the industry for their reliability and durability so you can be sure that your appliance will last for many years.
However, even the best can develop some faults occasionally. In this article we list the most commonly reported faults for Miele dishwashers and look at the best ways to get them running properly again.
We also look at Miele dishwasher error codes, what they signify and how to solve any issues. If you own a Miele dishwasher, you might want to bookmark this page for future reference.
Miele Dishwasher Troubleshooting Guide
Below we have listed the most commonly reported faults with Miele dishwashers and solutions to the problems they represent.
|Miele Dishwasher Fault||Most Likely Cause||Solution|
|Dishwasher fails to drain||Clogged filter||Clean the filter|
|Dishwasher fails to turn on||No power supply, faulty door switch, interior fault or the control panel is faulty||Make sure the power supply is connected and switched on, check and replace the door switch, check the control board for a loose connection or check the control panel and replace if necessary|
|Water intake fails||Inlet hose is twisted or the water supply tap isn’t fully open||Straighten the inlet hose or replace if damaged or ensure the water supply tap is turned fully on.|
Let’s look at each of these faults in more detail;
Miele Dishwasher Fails To Drain
Miele makes some of the best appliances available worldwide and their dishwashers are no different. If your Miele dishwasher doesn’t drain, it’s usually caused by something simple.
The most likely problem here is that the filter is clogged. You will need to remove the filter and give it a good clean using warm water and a brush (we find a toothbrush works well). You should then make this a part of your regular cleaning schedule for your Miele dishwasher and clean the filter on a weekly basis.
To clean the filter all you need to do is;
- Remove the lower rack
- Remove the filter by turning the spray arm anti-clockwise
- The filter will then simply lift out
- Wash the filter using warm water and a toothbrush
- Before replacing the filter, push the plastic clips on the sides of the dishwasher to open the filter flap and rinse this using warm water
- Replace the filter, and listen for it to click into place
- Then put the filter back in and turn it clockwise to lock into position
- Replace the spray arm
- Replace the rack
Miele Dishwasher Fails To Turn On
There are several reasons why your dishwasher fails to start which include;
- No Power
Check that your home has power, then check that the plug is fully inserted into the socket, the socket works and the wall switch is turned on. You should also check that the circuit breaker is switched on.
- Door Switch Faulty
If your Miele dishwasher detects that the door isn’t fully closed, it will not start. This is a safety feature to prevent your kitchen from becoming flooded. The problem here could be the door latch itself which isn’t shutting properly and if there’s no obstacles preventing it from shutting, will need to be replaced. Or it could be the sensor is faulty and is not sending the correct message to the control board. If this is the case, the sensor will need to be replaced.
- Interior Malfunction
There are several components that could be causing this issue including;
- The Motor Start Relay
which if malfunctioning could prevent the dishwasher from starting
- The Drive Motor
If the drive motor is malfunctioning, it could stop water from circulating around your dishwasher which means the dishwasher wouldn’t start.
- The Thermal Fuse Has Blown
This is likely to happen if the appliance was overheating to prevent any serious damage. The thermal fuse will need to be replaced before the appliance will work again.
- The Motor Start Relay
- Faulty Control Panel
The control panel is where all of the buttons are situated and is where all controls come from. If it develops a fault it could be the cycle has stuck from a previous cycle, the timer is faulty, the start button has failed or the rest of the buttons are sticking. The best solution here is to replace the control panel.
Miele Dishwasher Water Intake Failure
This is more often than not caused by the inlet hose becoming kinked or twisted. To solve this, inspect the water inlet hose and ensure it is straight. Or it could be the supply tap isn’t fully open or the inlet valve is faulty.
If it is the inlet valve, it will need to be replaced and this is best done by a qualified technician.
Miele Dishwasher Display Turns Off
In most cases, if the display turns off it’s because the appliance is in standby mode. All that is needed is to press any button to get the display working again.
If the display remains blank however, and you can hear the buttons clicking as you press them, it usually indicates there’s a software fault which needs updating. This is a job best done by a qualified dishwasher technician.
Water Intake/Drain Indicator Flashing
If the water intake/drain indicator light is flashing, it indicates that there’s a problem with the water drainage system. It could be caused by a number of things including;
- Drain Hose Twisted Or Clogged
You will need to inspect the drain hose for any twists or kinks and straighten the hose before checking for any blockages.
- Filter Clogged
Check and clean the filter (see above) and make the filter a part of your regular scheduled maintenance.
- Drain Pump Faulty
The drain pump could have a broken impeller or some other fault and will probably need to be replaced.
- Motor Issues
If the motor is malfunctioning, it will most likely need to be replaced.
Miele Dishwasher Error Codes
Now that we’ve covered all of the most commonly reported and less common faults connected with Miele dishwashers let’s take a look at Miele dishwasher error codes.
|F01 & F02||Temperature sensor fault|
|F12, F13 & F15||Water intake fault|
|F14||Heater pressure switch fault|
|F18 & F19||Flow meter fault|
|F24||Heater relay fault|
|F26||Temperature sensor fault|
|F32, F33, F36||Door lock fault|
|F42||Power supply fault|
|F47||Electronic interface faulty|
|F51 & F52||Heater relay fault|
|F67, F68, F69, F78 & F79||Circulation fault|
|F70||Float switch fault|
|F86 & F87||Softener fault|
|F88||Turbidity sensor fault|
|F91||Load size sensor fault|
Let’s look at these error codes in more detail;
Miele Dishwasher Error Codes F01, F02
Temperature Sensor Fault
There are several things that could be affected if either of these error codes are displayed. All of which are connected to the temperature sensor or thermistor as it is also known.
We advise that you contact a qualified technician to solve this problem.
Miele Dishwasher Error Code F11
This is one of the most common error codes displayed on Miele dishwashers. It relates to the dishwasher not draining correctly. This is usually caused by a twisted or blocked drain hose, a clogged filter, a blocked drain pump or a jammed sump return valve.
You can check the drain hose and the filter yourself, but all other issues should be checked by a qualified technician.
Miele Dishwasher Error Codes F12, F13, F15
Water Intake Fault
If any of these error codes are displayed, your dishwasher is suffering from a problem with the water intake. This could be due to the inlet hose, inlet valve or the flow meter.
This is another set of faults best left to a qualified technician.
Miele Dishwasher Error Code F14
Heater Pressure Switch Fault
This error code usually refers to a fault with the heater pressure switch or it could also be connected to the water intake. A technician will be needed to check the heater pressure switch, the circulation pump motor, the flow meter, wash pump and the motor capacitor.
Miele Dishwasher Error Codes F18 & F19
Flow Meter Fault
If either of these error codes are displayed your technician will know it’s a problem connected to the flow meter. The inlet valve could be faulty, it could be the flow meter is faulty or it could be the flow sensor is faulty.
Miele Dishwasher Error Code F24
Heater Relay Fault
There are several causes for a fault in the heater relay which include; the supply voltage is connected to the electronics output, the heater relay contacts have fused, there’s moisture in the heater relay or there is a fault in the plug on the exit side of the heater relay.
The technician will check all of this and if the heater relay is found to be faulty it will need to be replaced.
Miele Dishwasher Error Code F 25
This error code usually indicates a faulty heater relay, a defective heater or too much detergent or rinse aid dispensed. The technician will need to check the heater, the heater relay solenoid, and the control board.
Miele Dishwasher Error Code F26
Temperature Sensor Fault
This error code indicates that the temperature sensor has malfunctioned because the water temperature has reached temperatures in excess of 90 C. This could be caused by a malfunctioning control board, the temperature sensor or the heater relay.
All of which will need to be checked by a qualified technician who will replace any defective parts as necessary.
Miele Dishwasher Error Codes F32, F33 & F36
Door Lock Fault
This can indicate the door lock won’t close, the door lock won’t open or simply the door lock is defective. In some cases all that is needed is to clean the door lock and latch or replace the spring in the door lock.
However, in most cases the door lock assembly will need to be replaced.
Miele Dishwasher Error Code F40
This error code typically signifies an electrical fault usually related to the control board. In most cases, the control board will need to be replaced.
Miele Dishwasher Error Code F42
Power Supply Fault
This error code indicates a fault with the main power supply. It is usually to do with line frequency which should be within certain parameters. If the correct frequencies cannot be established this error code will be displayed.
You will need to get the main power supply checked by an expert to solve this issue.
Miele Dishwasher Error Code F47
Electronic Interface Faulty
This error code indicates a faulty interface between the selection display and the main control board. This can often be resolved by switching the appliance off and then on again.
However, if this fails to solve it you might need to replace the control board which is a task best done by a technician.
Miele Dishwasher Error Codes F51 & F52
Heater Relay Fault
These error codes indicate that the dishwasher’s control module is not receiving the correct messages from the temperature sensor. The technician will need to check the heater relay, the heater relay solenoid and the heater pressure switch. If any of these proves to be faulty, they will need to be replaced.
Miele Dishwasher Error Codes F67, F68, F69, F78 & F79
These error codes indicate there is a problem with the dishwasher’s circulation system. This means the wash pump isn’t working for some reason. This could be due to the heater pressure switch being faulty, the wash pump is blocked, the heater relay is faulty or there is a problem with the wiring system that connects these parts.
Miele Dishwasher Error Code F70
Float Switch Fault
The F70 error code indicates the float switch has detected water in the drip tray. This is a safety feature designed to prevent the dishwasher from flooding your home. This will start the drain pump operating and it will continue to operate even after the appliance has been turned off.
The only way to deactivate the drain pump in these circumstances is to disconnect the power supply. The float drip tray will need to be cleaned and dried to solve this but the technician will also check the appliance for any leaks etc.
Sometimes inferior detergent can be the cause of this problem and the best way to prevent it in the future is to use better quality detergent that doesn’t produce so many soap suds.
Miele Dishwasher Error Codes F86 & F87
Softener Sensor Fault
This can be caused by a lack of salt, or the sensor could have developed a fault. You should start by topping up the salt level but if this doesn’t solve the issue, you will need to get a technician to solve this problem.
Miele Dishwasher Error Code F88
Turbidity Sensor Fault
This error code indicates that there has been a false reading or no reading at all from the turbidity sensor. It could be that the sensor is clogged, the connection between the turbidity sensor and the control module is broken or the sensor has burnt out.
This is another issue best solved by a qualified technician.
Miele Dishwasher Error Code F91
Load Size Sensor Fault
This error code indicates a fault in the sensor that determines how many dishes are in the dishwasher’s baskets. Most of the time, this fault doesn’t prevent the dishwasher from operating and after it has paused for a while, it will start again.
It usually means that the sensor will need to be replaced to solve this problem. Although it can be caused by dishes or bowls being placed the wrong way which allows them to fill with water and affect the weight of the basket. Ensure that dishes are always stacked in the correct way to prevent this from happening.
Frequently Asked Questions
Many Miele dishwashers have diagnostic systems built in which will detect a fault and show it on the door panel. Every model has its own set of error codes and you should consult your handbook for more information.
Error code F11 on a Miele dishwasher indicates a problem with the drainage system. You should check the drain hose and the filter.
The F02 error code on a Miele dishwasher indicates a problem with the thermistor. This will almost certainly need to be replaced.