Kitchenaid KDFE104DSS0 - Won't dry - Heat Dry button will not light up

[boinzy]

Model Number

KDFE104DSS0

Brand

KitchenAid

Age

6-10 years

I have a Kitchenaid KDFE104DSS0. Hasn't been drying properly for a few weeks, although we only just noticed.

The heat dry button beeps, but the light for that button does not light up.

Did self diagnostic and got the code 7 - 1

I have tested the heating element and I am getting 12 ohms.

I have tested the thermostat and I am getting continuity at room temperature. I have-not tested the thermostat at high heat levels.


Could it be the circulation pump? How can I test?

Is there a heating element relay I can check?

If not those things, it may be a control board?

Thank you.

 

[Jake]

I'd first disconnect power to the dishwasher, then check your control board and see if you notice any burnt spots on it, if so that is the bad part. Just unsnap the plastic casing from the control board to get a good view of it clearly.

Here's the control board for your model, if needed:
Control Board W10854215


Here's the service manual for your model: https://drive.google.com/file/d/10A6C6XdX98ZCaI8H9pR1_kL5oGeWf9hL/view?usp=sharing Pages 4-5 through 4-8 show you how to get access to it.

 

[boinzy]

OK, I replaced the Control Board, but the Heat Dry light still will not light up.

Diagnostic mode reports back no errors. The heating element was hot after running through the cycles.

Is it possible that the water is heating during the wash cycle but heat dry isn't on and I don't know it because the light isn't on. Heat dry button still beeps just no light.

To be honest, I'm not sure if the wash cycle not heating enough is my issue, or just heat dry not working.

My symptoms were dishes not getting as clean as before. Soap residue on dishes after wash. Mold starting to form on dishwasher rack parts.

I'm not sure what troubleshooting I should do next?

Thank you.

 

[Jake]

Is it possible that the water is heating during the wash cycle but heat dry isn't on and I don't know it because the light isn't on. Heat dry button still beeps just no light.

Ok, yes that is possible. But is the heating element HOT in the dry cycle? If not, it could be a short in the control panel(keypad and console) for that heat dry button.

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 (no longer sees stuck keys with keypad unplugged), it will respond by turning on the drain motor for 2 minutes. Replace keypad and console.
B. If control board is not OK (still sees stuck keys with keypad unplugged), 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(keypad and console) for your model, if needed:
WPW10537336 Panel-Cntl (stl)



But you may have another problem since you mentioned the soap residue on dishes is not dissolving.

After it fills with water do you hear the wash motor running and water splashing inside the tub?

Here's the wash motor for your model, if needed:
Pump and Motor Assembly W11032770


Here's the video:

KitchenAid Dishwasher Circulation Pump Replacement #W11032770 | Repair Clinic

This video provides step-by-step repair instructions for replacing the circulation pump on KitchenAid dishwasher model #KDTE204EPA3. Learn more from the experts at Repair Clinic.

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