The flashing light is an error code,you either have a bad heater or the board is bad,once you reset it after like 6 or 7 wash loads it will start over again,if you remove the bottom kick panel,you'll find the tech sheet there,look up light flashes 7 times and it will tell you how to check the heater from the board to see if the heater or board is bad
Check, if you have water in the machine, if yes, your control board could at fault
SOURCE: Whirlpool dishwasher clean light flashing
That means the control sensed that the heater in the d/w did not operate 3 times in a row. so the unit locks out. First remove the kick plate and you may have to pull the unit out from under the cab, but check your heater. use a meter to see if it reads open, if so order a heater assy it will come with a new control replace it to. If your heater checks good press in sequence normal wash , heat dry ,normal wash,heat dry , normal wash , heat dry three times within 6 sec all the lights will come on then hit cancel. What that did is reset the control and clear that fault. Keep in mind that d/w does not heat it's own water your incoming water temp should be 120. the d/w will maintain that temp. when starting your d/w first turn on your hot water till it gets hot then start your d/w this insures your unit fills with hot water and not cold
SOURCE: whirlpool gu2400 dishwasher
You will have to reset the console. To do this, close the door and press these buttons in sequence...
-high temp wash
-heated dry
-high temp wash
-heated dry
...all
the lights will turn on briefly and the machine will start a diagnostic
cycle. You can press cancel or let the diagnostic cyle finish (1-2
minutes).
You should now be able to run the dishwasher as normal.
SOURCE: clean light flashes
You will have to reset the console. To do this, close the door and press these buttons in sequence...
-high temp wash
-heated dry
-high temp wash
-heated dry
...all
the lights will turn on briefly and the machine will start a diagnostic
cycle. You can press cancel or let the diagnostic cyle finish (1-2
minutes).
You should now be able to run the dishwasher as normal.
SOURCE: whirlpool gold dishwasher will not work the clean
When
the dishwasher doesn't sense a water temperature increase, it stops
working and locks the functions (clean light flashes 7 times, all
buttons are non responsive). It does this as a safety in case the
element is broken and feeding electrical current into the water.
To resolve this you will have to reset the console. Do this by closing the door and press these buttons in sequence...
-high temp wash
-heated dry
-high temp wash
-heated dry
...all
the lights will turn on briefly and the machine will start a diagnostic
cycle. You can press cancel or let the diagnostic cyle finish (1-2
minutes).
You should now be able to run the dishwasher as normal.
If
the issue returns, you could have a problem with the heating circuit
(ie. element, thermostat or wiring).
It rarely happens but it could
also be the door switch not engaging properly when the door is closed
(slightly bend the door latch down making sure it doesn't hit the door
when you close it).
Good luck!
SOURCE: the dishwasher won't start, the clean light flashes green 7 times
I have the same problem with ours Stock #17039 Type #575-0 Model # 665.17039401
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