Whirlpool dishwasher WDT720PADM1 repeated unresponsive start button

[RangerR93]

Model Number

WDT720PADM1

Brand

Whirlpool

Age

1-5 years

Like the thread title says I've got a Whirlpool dishwasher model #WDT720PADM1 with an unresponsive start button. Problem started several weeks ago however in the meantime I've been able to reset it via the diagnostic scan and per those results I replaced the turbidity sensor/thermistor. That seemed to have fixed the problem for about a month then it failed again. Same thing, everything seems to work as designed except the start button.

Thought maybe the sensor I replaced was a dud bc it was a cheap non factory part so I replaced it for the 2nd time yesterday. I've also cleaned all the filters/screens etc.

After replacing the sensor yesterday it took at least 4 breaker trips and diagnostic scans to get it to finally reset which it's never done before. This time the codes that came up were F6 E6. Came up 3 times where it's only came up 1 time with past scans. As far as the scans go I'm not even sure I'm doing it properly. I've initiated it and as I watched it do the process it doesn't seem to do the same things described in the tech sheet.

The codes I'm referring to come up right away but nothing after that like I expected per the tech sheet. Quite possible I'm not understanding something about the process and or doing something wrong. If there's anyone here that could shed some light on this I'd be very grateful...thanks

 

[Jake]

F6E6 is Cool Water---->Incoming water under 84°F (29°C). I'm attaching your tech. data sheet below.

1. Be sure dishwasher is connected to the hot water supply.
2. Confirm temperature at sink (recommend 120°F [49°C]).
Instruct customer to run water at sink before running dishwasher.
3. Unplug dishwasher or disconnect power and check all connections and measure resistance in Temperature Sensing circuit. Replace OWI if resistance is high.

Are you running the hot water at the sink first before you start the dishwasher?

Is the START/RESUME button flashing at all while its unresponsive?

Its possibly a short in your keypad control panel and causing this problem.

Do this below:
- Unplug dishwasher or disconnect power.
- Disassemble door and disconnect keypad connection from control board or LCD display module.
- Verify all other connections to control board are made.
- Reassemble door, but do not close door.
- Plug in dishwasher or reconnect power.
- Wait at least 7 seconds for control board to power up completely.
- Close dishwasher door and monitor control board response:
A. If control board is OK, it will respond by turning on the drain motor for 2 minutes. Replace keypad and console.
B. If control board is not OK, it will not turn on drain motor. Wait for at least 10 seconds. If there is still no drain response, then replace control board or LCD display module (whichever one the keypad was connected to).

Here's the control panel console keypad assembly for your model:
W10838676 Panel-Cntl


Let us know what you find.

Jake

 

[RangerR93]

Thanks for your response. I've done several of the things you've listed except measuring the resistance in the temp sensing circuit and the scenario under
"Do This Below". Yes I'm running the hot water at the sink before starting the dishwasher and no there's absolutely no blinking or illumination whatsoever from the start button. I'll do the remaining instructions asap and report back. Thank you very much!

 

[Jake]

Ok, sounds good, yes let us know what you find.

Jake

 

[RangerR93]

Did the remainder of the tests you suggested and determined the keypad assembly was the problem. Ordered/waiting on new one to be delivered so I can install it. I'll report back after that....thanks for your help it's greatly appreciated!!

 

[Jake]

Ok great!

Yes, keep us posted.

Jake