FIXED GE Dishwasher GDP665SYN3FS not heating water or drying

[RedIron357]

Model Number

GDP665SYN3FS

Brand

GE

Age

1-5 years

Searched for this model solutions, have found none matching. Worked great then stopped heating, sanitizing, or drying, collects sludge on filters. Similar model symptoms seem to point to Turbidity sensor, Flood sensor, or TCO, if it has one. Unit is 1.5 yrs old just out of warranty. Replaced heating unit prior to finding this site with no change. Can't find manual that really helps diagnose issue without throwing parts at it. Unit is at daughter's house 1/2 a state away, would like to fix it next trip that way bringing correct parts. Thanks

 

[Jake]

Hi,

Here's your service manual: https://drive.google.com/file/d/15CmFe-hcufL5XUJPsqlEN3AzwDZ6z0M-/view?usp=sharing

Page 73 starts the section on the heating element, then on page 74 do the flow chart steps to determine the cause of your heating element problem. You will need a multimeter to do that flowchart with.

Let us know what you find.

Jake

 

[Jake]

--->The TCO is located on the right side of the tub, approximately 16 inches from the front of the tub. On your model its underneath the pump, so you will likely need to pull the dishwasher out to get access to it. Make sure you disconnect power to your dishwasher FIRST!

The TCO is in a series circuit with the heating element, if that TCO is bad(open) it will never heat.

TCO=Thermal Cut Off

Here's the TCO for your model:

GE WD21X27402 Harness Asm Ac (AP6991590) - AppliancePartsPros.com

Harness asm ac WD21X27402 / AP6991590 made by GE

click.linksynergy.com

Its the SILVER METAL part integrated into that wire harness. See the black button on the back of it? That's the RESET BUTTON, PRESS IT and see if that solves the NO HEAT problem.

Here's the photo of it:

Jake

 

[RedIron357]

Great info! Thanks will try these next.

 

[Jake]

Ok sounds good.

Let us know how it goes.

Jake

 

[RedIron357]

Sorry for late response. I relayed the info to my daughter who was able to reset the TCO. Success! She had to reset it again last week, but so far it's worked. Thank you for your info and input.

 

[Jake]

Ok, sounds good.

If that TCO keeps tripping its likely getting too hot in the tub, it trips at 180 Degrees F. So her water heater may be too hot, or use a lower heat setting, or avoid using the heat boost option.

Jake