FIXED GDT645SYN0FS GE dishwasher starts cycle but doesn't complete. random H20 errors

[acamato]

Model Number

GDT645SYN0FS

Brand

GE

Age

1-5 years

Was getting random H20 errors. Had water pressure and flow. Would try to rerun a cycle and it would eventually compete the cycle.
now, when starting a cycle the drain pump will run, then the nothing else.
I ran the service mode tests and everything seems to be working (drain pump, water valve, circulation valve). The control board is blinking green.
I got a board from eBay (from a scratch and dent unit). It has the H20 error at first, then I cycled power it worked for a few cycles. Now its doing he same thing.

Should I get a new board?

 

[acamato]

Maybe solved. I took apart thr pressure switch and found it clogged. I cleaned it out and put it back in. The drain pump ran a second and the water valve opened. As I am trying this, the circulator pump just started.

 

[Jake]

Is it working good still now?

Yes, another member had this same issue:

FIXED - GE Dishwasher GDT665SSN0SS H20 Error - replaced water inlet valve - still getting error

Hello! I am having a hard time diagnosing the trouble with my dishwasher. I was getting the H20 error code, so I did the following: 1. Checked all hoses - no kinks or blockages 2. Checked hot water pressure - very good flow, no issues 3. Replaced water inlet valve - old one was not dirty or...

www.applianceblog.com

Your model uses the same exact machine control board.

Here's the machine control board for your model:

GE WD21X25992 Configured Machine Control Board (AP6990385) - AppliancePartsPros.com

Configured machine control board WD21X25992 / AP6990385 made by GE

click.linksynergy.com

Jake

 

[acamato]

It’s fixed. Ran two cycles with no issue. The original control board is in it. Now I have a spare board.

 

[Jake]

Ok, sounds good.

Thanks for the update!

Jake