Whirlpool Dishwasher GU2400XTP Blinking Light

[rwbil]

I have Whirlpool Dishwasher GU2400XTP that has the normal light button Blinking.  It is just a constant blink.  I don't see any type of delay for code.  

I was able to reset it using the normal & heated dry buttons and it continues to run for awhile and then goes back into the blinking light mode.

It can fill up with water, pump the water around and drain, so I know those function work. 

I have read different possible causes such as heating element, temperature sensor or buttons stuck and needs new panel. 

There was no manual in the bottom showing the cycles and what happens in what order.

Any suggest on next step.

 

[MrApplianceMatt]

Intermittent bad door switch? Possibly bent hinge?

[rwbil]

6 hours ago, MrApplianceMatt said:

Intermittent bad door switch? Possibly bent hinge?

Does the normal wash button light constantly blink when the door is open?  I guess I could verify that and test the door switch, but I do not think that is it because when I reset the dishwasher it starts to run again, yet if I just open and close the door which would also jar the switch it does not.  

I see some places people say it is the touchpad, but at $150 or more and not even sure if that is fix, I would better off picking up a 2-3 year old used one on craigslist.  

I might try and take the cables off and put them back on and maybe luck out and something is just loose.

[Budget Appliance Repair]

No, not a bad door switch.  The touchpad/console is bad and needs to be replaced.

A fast blinking light above a key means the key is stuck - pretty common problem with membrane keypads of this type on all brands.

[Ian B]

If the light blinks 7 times, you have an issue with the heating circuit. Control board, thermostat, or the element would be at fault. 

[rwbil]

6 hours ago, Budget Appliance Repair said:

No, not a bad door switch.  The touchpad/console is bad and needs to be replaced.

A fast blinking light above a key means the key is stuck - pretty common problem with membrane keypads of this type on all brands.

Yea I think this is the problem, but not worth risking $150 for a new touchpad that may or may not fix the problem on an old dishwasher.

[rwbil]

2 hours ago, Ian B said:

If the light blinks 7 times, you have an issue with the heating circuit. Control board, thermostat, or the element would be at fault. 

Not 7 blinks on and then a pause.  Just constant steady blinking.

[Ian B]

That’s what I figured. I’d agree with @Budget Appliance Repair Then. 

[16345Ed]

From tech sheet...

CHECKING KEYPAD OPERATION
A rapidly blinking LED over one of the keys of the keypad (or sometimes a “dead” keypad/console) indicates one or more key switch lines are stuck or shorted on either the control or the keypad. To determine which one, do the following test:
1. Unplug dishwasher or disconnect power.
2. Open console and disconnect the keypad ribbon connection from the control (at P1). Put console back together.
3. Plug in dishwasher or reconnect power.
4. With door latched, disconnect and reconnect thermistor or OWI sensor
two times in less than 6 seconds.
5. Wait 10 seconds, then monitor the control’s response to the thermistor:
➔ If the control is OK (no longer sees shor ts with the keypad unplugged), it will respond by running service diagnostics. Listen for it to begin filling after it concludes the 5–10 second display test at the beginning of the service diagnostics cycle. Check and/or replace the keypad if the control responds OK.
➔ If the control is not OK (still sees shor ts with the keypad unplugged), then it will NOT respond to the thermistor at all and will remain off after 10 seconds go by. Make sure the keypad is unplugged for this test. Confirm that all other connections are made, the console and door are reassembled, power is back on, and the door is latched; then repeat steps 1-5 above. If still no response, replace the control.
General Keypad Inspection:
Unplug dishwasher or disconnect power.
■ Check keypad ribbon tail for broken/shorted/corroded/creased traces. ■ Check for loose connection to control.
■ Check for evidence of contaminants or corrosion around the perimeter of the keypad, on the keypad ribbon tail and/or on the keypad connector at the control.
■ Perform keypad function check.
■ For a final check (if possible), try replacing control/keypad with a known
good control/keypad to identify where problem(s) persist.
To test the model ID diodes in the keypad:
Check each key and confirm corresponding LED turns on and that the proper delay selections for that model are available. If ID diodes for this keypad are opened or shorted, key and LED mapping and features like delay may be altered.
To test an LED function:
Confirm that the LED turns on during the “Display Test” at the beginning of the Service Diagnostics Cycle (see “Service Diagnostics Cycle Time Chart”, NOTE 2).
Checking keyswitch contacts:
■ Unplug dishwasher or disconnect power. ■ Remove connector P1 from the control
board.
■ Using the table at right, measure the resistance across the switch when the key is pressed.
NOTE: The meter must be connected with the proper polarity.
The resistance reading should go from infinity (open circuit) with the key open down to a readable ohm level with the key pressed. The level may be different depending on your meter, since there is a diode in the circuit.
If available, you could use the “Diode Test” function of a digital meter, which will give a voltage to turn on the diode in
the circuit.
➔ If any switches fail this test, replace the console panel/keypad assembly.
➔ If all switches test OK, replace the machine control board.
 

[Budget Appliance Repair]

@Ian B The light blinking 7 times pausing and repeating is only for the CLEAN light - nothing to do with keys shorted or light blinking above any other keys, (in this case the light above the NORMAL cycle key is blinking - so nothing to do with the seven blink CLEAN light error code).

[Ian B]

13 hours ago, Budget Appliance Repair said:

@Ian B The light blinking 7 times pausing and repeating is only for the CLEAN light - nothing to do with keys shorted or light blinking above any other keys, (in this case the light above the NORMAL cycle key is blinking - so nothing to do with the seven blink CLEAN light error code).

Should of read it clearly lol. Whoops. Thanks for that.