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FIXED Conflicting guidance on GDT695SSJ2SS (top panel, no lights)

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JBGPS

Premium Member
Joined
Feb 4, 2023
Messages
2
Location
Grand Junction, CO
Model Number
GDT695SSJ2SS
Brand
GE
Age
1-5 years
Hi,
I've read through a couple of threads here, mostly involving Jake, trying to troubleshoot the apparent lack of power to the top panel controls on my GDT695SSJ2SS dishwasher:

Original issue was no LEDs, and was reset once by throwing the breaker. It happened again two runs later. I have not been able to get the top panel to respond since, no LEDs, and it won't go into error mode or service mode. I verified AC power at the j-box of 125VAC. I pulled the machine control and verified that the Service LED on that is lit, constantly. I checked voltage on the DC supply (J722 pins 2 and 5) and had 14.1 VDC.

It's at this point I have an issue because I've got conflicting information on the next step:
  1. The service guide I have indicates that a steady-on Service LED indicates "Software error; replace machine control board" while
  2. Jake suggested to another poster that if the S LED is steady on and there is 14 VDC on J722, the problem is with the UI Control board.
So, I am not sure which part to replace or which troubleshooting step to take next.

I'll also add that I inherited this unit with my house and this is my first troubleshooting event, and that when I opened the dishwashers AC junction box to check VAC the ground wire came loose before I even had a chance to turn the wire plug. So, poor job there. The unit has run without problem for more than 3.5 years, and things were tight in the box so I suspect the ground contact did not come loose until I opened it, but I'll post that in case anyone thinks it's pertinent.

Anyway, I'd appreciate any guidance on clarifying this issue and possibly getting my unit fixed.
Thanks very much.
 
Here's your service manual: https://drive.google.com/file/d/1M-G9W3HiaYnihdB5Cy-jfSPoVf8DZ7j7/view?usp=share_link Look on page 45

If your STATUS LED is STEADY ON--->UI personality not set, communications lost between UI and MC.

I pulled the machine control and verified that the Service LED on that is lit, constantly. I checked voltage on the DC supply (J722 pins 2 and 5) and had 14.1 VDC.
Yes, that indicates your machine control board is fine, the problem is the UI Board.

Here's the UI Board for your model: WD21X31902

Let us know how it goes after you replace it.
 
Yep, I just finished installing the replacement part and the UI is now lit. If I run into any problems on my first cycle I'll be back to comment, but at this point it looks good.
Thanks to Jake and applianceblog.com.
 
Excellent, glad to hear the new UI Board fixed it.(y)

Thanks for the update!
 
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