More details ...
This video has already been seen ... everything was just fine. Backflow preventer looks normal.
What could be the cause of a lot of dirt in the dishwasher ( I clean periodically the filter and even I inspect the drain pump impeler). The drain pump impeler works since water is coming out.
My wife is cleaning the dish every time before put in the dishwasher but still overtime there is some dirt residual every where in the dish washer (basket get dirty, filter section) We clean the filter and make sure nothing is obstruing the impeler very often.
Few months ago I make sure to have a high loop installation thinking this was potentially the issue .... but we still have the issue.
I dis-assemble the side panel to inspect the water inlet and the pressure switch. I found the water inlet pretty dirt try to clean by injecting water but still a little bit dirt... it seems there is a float or some kind of dispositive in the water inlet maybe it does not operate properly (the part still move however). Could a defective water inlet explain the issue ?
We will try Dishwasher Magic, but knowing that we already tried some product to clean dishwasher and also try a bit a Javex with water without any sucess I'm not very confident.
I have the Backflow preventer in my hand as I speak, What could be a defective Backflow Preventer after all this is only a piece of rubber !!!
Backflow preventer is not broken there is a rectangle section attached to a circular section. The joint between the circular and rectangular section is flimsy/thin but not broken.
So it seems my only potential fix is Dishwasher Magic ... :(
I'm very suspicious this will fix the issue .
We have tried Finish Dishwasher Cleaner ... without success the problem came back ....
Why the basket, filter, sump area would become so much dirt if we wash the dish before put in the dishwasher. This problem is there since a while and we are cleaning the dish .... but after a month or two there is a lot of dirt deposit. Is it not normal to toroughly clean a dishwasher each month... I doubt especially when you clean your dish ...
Could it be the temperature of the water not hot enough making not a good job to liquify the small amount of dirt (remember we clean the dish !!!).
I open the dishwasher in the middle of the wash cycle and the water temperature was not hot about 40C !!!!!
How can I make sure it is the heater itself or the heater realy that does not turn on the heater
Could it be the thermistor ?
Changing the control board is pretty expensive I guess and could not find parts easily
Is the heater realy located inside the control board ?
That is strange we had a smoke failure 2 years ago and finally got free replacement of the control board since this was covered under a recall.
If it failing again then there is really a design flaw with the control board !!!
Do you know where I can get a control board innexpensive :)
Before changing the control board which seems to be okay after visual inspection ( I could not see anything wrong like dark solder joint).
I want to make sure it is not the heater, I measure the heater resistance it is 11 ohms. Is this okay I have read somewhere else that heater shall be 30-50 ohms !!! Could you confirm or simply provide me heater spec.
If heater is okay then I want to check the NTC /thermostat
I just want to avoid buying a control board $150 if the problem is something else
I have also check the thermal fuse and it is 0 ohms (good).
There is a flow switch in series I wonder what is the purpose of this switch ( it is normally open).
My next test is to test the signal on the big 2 pins connector (red wire) this signal is the 120VAC going to the fuse (which I previously tested .
I guess if there is no 120VAC on this connector pin then it means the control board is wrong .... In fact the relay on the control board is wrong.. I assume I could simply change the relay (de-solder it)
What about the NTC could it give false value to the control board in which case the control board could open the relay.
How can I make sure the NTC is okay ?
I'm just a simple customer, the wiring diagram was in the dishwasher. A piece of paper folded in the base of the dishwasher. I have an Eng degree. but i do not know how works dishwasher. My biggest concern is spending $150 and still have the issue. This is why I'm doing all these checks before buying a new control board ....
Hello again, I'm following up to see how your appliance is doing since I haven't heard back from you and this question is still open. Is there anything else that I can help you with today?