The thermistor beneath the accumulator inside the sump
detects the water temperature as it begins the first 8 minutes of the main wash
cycle. During this time, the controller expects the thermistor to detect the
2-4 degrees rise in the water temperature when the first 8 minutes is
completed. If the expected temperature rise is not met, the controller will not
be satisfied. It will shut the dishwasher down and blink the clean light 7
times. Press the heated dry then normal wash buttons in the same
sequence two times. The unit will enter diagnostics mode, but
can be stopped by pressing the cancel button. It will clear the fault
and makes the dishwasher run normal but the fault will appear again if you have problem in either of the following:
- Heater and its circuitry
- Water filling
- Pumping motor
If the heater is not working, the water temperature will not rise then controller will shutdown the machine.
there's no water entering the machine, no water will be heated and
there's no way the controller through the thermistor can detect any
rise in temperature.
If the pumping motor is not working, the water
cannot circulate over the heater and be heated. Again, the controller
will not be satisfied.
You can bypass this fault detection
feature by filling the machine either with extremely cold or extremely
hot water. Water colder than 62 or hotter than 160 degrees Fahrenheit
will make the controller not to check for a temperature rise but rather
continue on the next cycle.
Please let me know if the problem still bother you.