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F6 would mean the water is not getting heated. I am not sure which model you have but if there is only a cold water inlet connection then either heater or thermostat is faulty. If you have both hot and cold water inlet then you may have to check if hot water is getting in at right temperature. Easiest way to confirm is to run dishwasher in cold cycle (short rinse) and see if it goes through. The heater would get used in warm/ hot wash cycles and drying.
The usual discrepancies with run times is due to water heating time. For example, your dishwasher may be estimating run time + time to heat the water from cold. If your dishwasher is connected to hot water instead of cold, it will skip the majority of the heat cycle and adjust the time accordingly. On the other hand for other people, their dishwasher brands may say "50 minute wash" but this does not take into account heating time, so wash can be anything up to around 70-80 minutes.
Generally speaking, dishwashers don't heat cold water on their own. Be sure the dishwasher is connected to a hot water supply and that hot water is available to the dishwasher at the START of the cycle.
Often it takes hot water several seconds for house plumbing to deliver hot water to an outlet. If the dishwasher is connected to the kitchen hot water supply, run the water in the sink until the water runs hot before you start the dishwasher.
Dishwashers often have heaters to heat the water even hotter than most home water heaters, but they are not intended to heat cool or cold water. You MUST furnish hot water to the dishwasher from the time the cycle is started.
I've seen houses that take so long for hot water to reach a faucet, the dishwasher is already full (of cold water) before the first drop of hot water reaches it.
I had the same issue and you will never beleive the solution.
Steps to follow:
1) run one full cycle with no dishes or soap
2) run one full cycle with a dishwasher cleaner like Jetdry
3) run one full cycle with a gallon of white vinager
4) never put soap in the extra in and only fill the main soap bin half way.
should work fine from here on out, but never fill main bin more then half way when you do dishes. also run the hot water in the sink until the water is very hot before starting the dish washer.
2 things will lead to soap not dissolving, first is cold water, so make sure you have hot enough water. second and more likely is the dispenser is not opening at the proper time , instead fully opens at end of cycle during the dry cycle never even getting wet, and washing dishes with no soap, id replace the dispenser or make sure your not stacking items in front of dispenser hindering the opening. also powder is best, tabs and gelpack put undo stress on the dispenser door not always allowing full operation...
It is very common that high eficiency, low water using dishwashers take longer to finish all cycles. The best way to "hurry" the washing is to make sure that the water heater is providing hot water of at least 120 degrees. But no hotter then 140 degrees.
If the dishwasher runs even longer, check to see is the dishwasher is actually connected to the cold water line. This dishwasher can be run from cold water but the water heating phase in the cycles will add much time ti the entire cycle.
This unit has a sensor that detects the detects the water clarity towards the end of the wash cycle. Rinsing the dishes may speed the load a little, but encourage not to go crazy on the rinsing because the dishwasher actually counts on the food particles to help clean the dishes.
Also, note that the final (third) blinking light means drying. You can simply open the door anytime after the final draining and power off the dishwasher, allowing the hot dishes to air dry.
Hope this helps. Please resply with your findings. Thanks!
Your problem is: You've just moved into a house and your Miele dishwasher only runs a cold to luke warm wash, and doesn't dry the dishes properly.
The d/w uses water directly from the hot water heater. Your problem is common when the pipe length between the two is long. By the time the hot water gets to the d/w it's already filled with the cold water that was sitting in the pipes. Don't dispare! Since the d/w is next to the sink, the next time your d/w is ready to wash just run the hot water till it's hot at the faucet then turn the d/w on, instant hot water for the d/w.
As far as your drying problem, this is common as the d/w gets older. In my humble opinion it's not cost effective to repair. I would be glad it's still washing, but it does mean it's time to start putting a littlr bit away each week and when it fails just buy new.
Feel free contact me again! Please give me a rating here at fixya.com before you sign off Thank you, Harvey your Master Plumber
Most DW today take a minimum of 90 minutes. Run the hot water from the sink until it gets hot, then start the DW, this will shorted the first wash cycle. It is not uncommon for the DW to run 2hrs or more based upon the water temperature entering the DW and the soil level of the items in the DW.