My dishwasher has been running for 4 hours!

Sometimes a dishwasher will run for hours especially new ones. Newer dishwashers use very little water but run much longer. There are some things you can do to shorten the time. Turn off the options. These extras will add time to the cycle. Sani rinse, Heavy wash, Hi temp, Pot and pans, Tough cycle. If you have a normal load of dirty dishes it’s unnecessary to add options. A normal load without extras can take 3 or 4 hours alone.

repair err 4

Most likely the control panel is defective. Go to the repairclinic.com for further diagnostic help and parts.

How long does it stay in the wash cycle? Indefinitely? Does the display continuously show "WASH"?. If it stays in the wash cycle indefinitely (i.e. continuously shows "WASH" for significantly beyond approx. 3 minutes), it's probably a control board malfunction. If it continues to wash after the "WASH" indicator goes out, it could be a shorted wash motor relay on the relay board or a fauly control board.

If the internal rinse water booster heater doesn't reach it's programmed setpoint temperature in time, the dishwasher will run an extended wash cycle to give the booster heater more time to finish heating the rinse water. If this is what's happening, the wash cycle would last approximately 3 minutes, then it would rinse regardless of whether the booster heater has finished heating or not.

The booster temperature thermistor may be bad, giving a false booster temperature reading, causing an extended wash cycle as described above. The booster heater elements or contactor may be bad, preventing the booster heater from heating and reaching proper temperature, also causing the same extended wash cycle to give the booster more time to heat.

Looks like the heater unit has packed up.

I cannot seem to find the actual model you have anywhere on the internet. But I am assuming you connect the dishwasher to cold water inlet and it is meant to have a heater.

Are you in UK or Europe. Bosch also makes parts for the NEFF dishwasher but I am not able to find spare parts for your exact model.

Please post a comment.

I suspect for either of these units that the timer control boards are bad.

If your dishwasher's cycle times are too long, check these:

Water pre-heating
Cycle not completing
Water pre-heating Yourdishwasher may pre-heat the water. If so, and if the water entering thedishwasher is cool, the heater may take up to half an hour to heat thewater.

To avoid the wait, increase the incoming watertemperature before turning on the dishwasher. Do that by running thekitchen sink faucet until the water runs hot. Or increase thetemperature of the hot water to the entire house at the hot waterheater.

Warning! To lessen the risk of scalding, don't set the hot water heater temperature higher than 120 degrees Fahrenheit.

Cycle not completing

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!

nardi dishwaser water will not drain away after wash cycle.

Rodney B if you are sure that the white film is detergent and not hard water deposits, then look at how you are using the detergent. When you watch the TV ads for dw detergents, they are showing baked on/extemely dirty dishes being put in the dishwasher and coming out clean. Well they do this as the dw detergent is designed to break down protein based food products. Fats, oils, and such. If you are prewashing your dishes before putting them in the dishwasher, then there is nothing for the detergent to attack and attach to, so it ends up staying in the dishwasher. If you are going to rinse your dishes, then you need only 1 tablespoon of detergent. Dishwashers are designed to clean using 4 parameters, hot water of 130 degrees, water, detergent,& pressure of the water jets. That is how they clean dishes. Now if this is hard water deposits, switching to an enviromently friendly detergent which is high is Citric Acid (What gives Tang drink its tartness) this will reduce this issue. Hope this helps