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Author Topic: KitchenAid KUDS01IJBS1 is not drying  (Read 3031 times)

Offline rtrainer

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KitchenAid KUDS01IJBS1 is not drying
« on: January 11, 2015, 10:25:36 AM »

Is there a way to test the heating element without taking the dishwasher out from under the cabinet?

Offline LowSL2

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Re: KitchenAid KUDS01IJBS1 is not drying
« Reply #1 on: January 11, 2015, 10:30:01 AM »
If memory serves, you're going to check resistance between the White wire with a Red tracer from the control board to the White wire with a Violet tracer at the door switch. It shoukd be between 10 and 30 ohms.

You should also check the thermostat underneath. There will be a white wire and an orange wire. Verify it is closed with close to zero ohms on your meter.

Double check the tech sheet located behind the kick plate since I'm going of of memory here. [emoji3]
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Offline rtrainer

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Re: KitchenAid KUDS01IJBS1 is not drying
« Reply #2 on: January 11, 2015, 10:36:53 AM »
Thank you.

so I can do this by taking the inside of the door off and measuring it at the control board, correct?

Offline domain

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Re: KitchenAid KUDS01IJBS1 is not drying
« Reply #3 on: January 11, 2015, 11:25:35 AM »
Yes

Offline rtrainer

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Re: KitchenAid KUDS01IJBS1 is not drying
« Reply #4 on: January 13, 2015, 07:55:25 PM »
So I found that the heating element is not open when measured between P6 and P7 on the control board. But when I run the dishwasher with Hi-Temp or Sani-Rinse selected, I can tell that the water is not being heated because of the  lack of steam when it is done and I open the door.

I am assuming that the Hi-Limit Thermostat is not the issue otherwise the the measurement above would have shown an open circuit. That leaves the control relay which means replacing the control board. Is there anyway to test this? Is the relay controlled by 120v or a low voltage from the control processor?
« Last Edit: January 13, 2015, 07:56:15 PM by rtrainer »

Offline domain

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Re: KitchenAid KUDS01IJBS1 is not drying
« Reply #5 on: January 13, 2015, 08:28:27 PM »
Behind the kickplate and insulation there is a test sequence to activate the relay

Offline rtrainer

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Re: KitchenAid KUDS01IJBS1 is not drying
« Reply #6 on: January 13, 2015, 08:40:41 PM »
Are you talking about the large foldout that shows all of the diagnostics, etc?

If so, I have that but could not figure out exactly which cycle would turn on the heater.

Offline domain

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Re: KitchenAid KUDS01IJBS1 is not drying
« Reply #7 on: January 13, 2015, 08:45:27 PM »
Yes! Look for "service diagnostics "with the chart

Offline rtrainer

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Re: KitchenAid KUDS01IJBS1 is not drying
« Reply #8 on: January 14, 2015, 12:54:25 PM »
Ok, I tested the heater relay and it is opening/closing for the 5 secs during interval 10 of the diagnostics. What I also found is that the vent does not appear to be working. From the diagram, the vent should be operating (not sure if it is open or closed..I think closed) during intervals 8-1 which is does not. I took it out and connected it directly to 120v and nothing happened.


Offline domain

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Re: KitchenAid KUDS01IJBS1 is not drying
« Reply #9 on: January 14, 2015, 12:57:10 PM »
If it is a wax motor, 2-4k  ohms

Offline rtrainer

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Re: KitchenAid KUDS01IJBS1 is not drying
« Reply #10 on: January 14, 2015, 01:02:28 PM »
I measure ~1K across the terminals with it removed from the circuit.

If this is bad, how does that relate to the drying problem?

Offline domain

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Re: KitchenAid KUDS01IJBS1 is not drying
« Reply #11 on: January 14, 2015, 01:17:29 PM »
It needs to open to let the steam out silly.

Offline rtrainer

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Re: KitchenAid KUDS01IJBS1 is not drying
« Reply #12 on: January 14, 2015, 01:22:00 PM »
lol..I know that.

But I still appear to have a problem. Are you saying that if the vent doesn't open, the moisture will not be exhausted out and thus will condense on the dishes giving he appearance that they are not dry? But steam does not come out of the door when I open it during the drying cycle.

Just so I am on the same page with the wax motor, it appears to be a plunger which is normally retracted and should push out when power is applied, correct?

Offline domain

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Re: KitchenAid KUDS01IJBS1 is not drying
« Reply #13 on: January 14, 2015, 01:25:53 PM »
Yes that is the thought. That needs to be proper. You may have an additional problem

Offline rtrainer

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Re: KitchenAid KUDS01IJBS1 is not drying
« Reply #14 on: January 14, 2015, 01:26:39 PM »
OK, so fix this and see if there is still a problem.

Offline domain

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Re: KitchenAid KUDS01IJBS1 is not drying
« Reply #15 on: January 14, 2015, 01:35:29 PM »
If the relay actuated in testing, I would fix the vent if it's faulty

Offline rtrainer

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Re: KitchenAid KUDS01IJBS1 is not drying
« Reply #16 on: January 14, 2015, 01:41:35 PM »
Yep, just ordered a new vent assembly. Should be here on Friday.

Offline rtrainer

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Re: KitchenAid KUDS01IJBS1 is not drying
« Reply #17 on: February 05, 2015, 06:52:31 PM »
Ok, I finally think I have everything fixed.

Here is the run down:

1. The wax motor was not bad. I did not understand what a wax motor is and how it works.
2. I finally decided to pull the heating element out of the dishwasher. Once done, I promptly found that it was open. Not sure why I did not get the reading the first time I checked it.
3. Element + control board installed...dishwasher working.
4. Few days later it stops completely.
5. TCO was blown.
6. Ordered and install the replacement.
7. Everything back to working.


Last question, why does the replacement TCO have new wires that replace the original ones? The connectors on the original wires fit the new TCO terminals.

Thank you again for everyone's help.