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Samurai Appliance Repair Man's Blog



How to tell whether the touchpanel or control board is bad in a Whirlpool dishwasher

Posted by Samurai Appliance Repair Man, in Dishwasher Repair 08 July 2013 · 2,462 views
whirlpool, dishwasher, keypad and 3 more...
Many times when troubleshooting a Whirlpool-built dishwasher (also sold under the Kenmore and Kitchenaid brands), you'll have a problem that looks like it could be either a bad touchpanel or the control board, but you can't really be sure. Examples include:

- Normal light keeps blinking but the dishwasher won't run
- none of the lights on the panel work and the dishwasher won't run

Could take on lots of other variations but the thing they'll all have in common is that dishwasher won't run.

The conundrum you face is which part to replace: the touchpanel or the control board?

Experience says that it's almost always the touchpanel that goes bad in these cases-- a keypad gets stuck closed or worn on the inside so it no longer makes contact.

Fortunately, there's a way to tell for sure without any guesswork!

Remove the kickpanels below the door and you'll find a tech sheet in a plastic pouch (unless some sleaze bag stole it). Therein it is written this simple procedure for determining whether the touchpanel or control board is the culprit:

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 if the control or keypad is faulty, do the following test:
1. Unplug dishwasher or disconnect power.
2. Open the dishwasher door.
3. Open console and disconnect the keypad ribbon connection from the control (at P1).
Make sure all other connections are made.
4. Put console back together. Do not close the dishwasher door.
5. Plug in dishwasher or reconnect power.
6. Wait 5 seconds.
7. Close dishwasher door.
8. Monitor the control’s response:
➔If the control is OK (no longer sees shorts with the keypad unplugged),
it will respond by turning on a Drain Motor for 2 minutes.
Check and/or replace the keypad if the control responds OK.
➔If the control is not OK (still sees shorts with the keypad unplugged),
then the drain motor will NOT respond and will remain off.
If no response, replace the control.



Source: Whirlpool Quiet Partner II normal light blinking


How to check and replace the main circulation impeller in a Bosch dishwasher

Posted by Samurai Appliance Repair Man, in Dishwasher Repair 02 July 2013 · 2,037 views
bosch, dishwasher, impeller, wash and 2 more...

While turning the impeller from inside tub have someone else watch the fan blades on the motor with a mirror under the machine.

Most likely you will find when turning the impeller the motor isn't actually turning, thus when motor is running, impeller isn't turning or is only turning very slowly from friction with back portion of impeller which front vane section has broken away from.


Adding a little to this, make sure when turning the impeller from inside the tub area not to push inward with too much pressure while turning because this will shove the two impeller halves back together and possible make the actual motor turn and make you think the impeller is OK when in-fact it is the problem.


Here's the part link for the circulation impeller kit: http://www.repaircli...t/167085/935404

Here's how to install it:






Source: Bosch Dishwasher SHU5305UC/U12 low/no circulation pump pressure


How to reset the control board in a Bosch Ascenta dishwasher

Posted by Samurai Appliance Repair Man, in Dishwasher Repair 28 June 2013 · 2,629 views
Bosch, Ascenta, diswasher and 2 more...

Even in diagnostic mode this models control will happily point toward a problem with the safety float or switch which may not be the problem. Try resetting the control using the following two steps:

1) With the door closed and the dishwasher turned on, press and hold the Start button for 5 seconds. If your model has a display it should show "01" of "00". Press the On/Off button (turning the dishwasher off) and the control should be reset.

2) If step one didn't work, remove the toe kick and disconnect the drain pump wire harness from the drain pump. Make sure the connector isn't touching anything, tape it if necessary. With the door closed, press the On/Off button turning the dishwasher on. You should hear the control turn on and the relays click on and off. Wait about 30 seconds with the power on, then press the On/Off button to turn the dishwasher off. With the power off, reconnect the drain pump harness and reinstall toe kick. With the door closed, press the On/Off button to turn dishwasher on. The control should be reset.



Source: Bosch SHE6AF02UC/02 Drain Pump Keeps Cycling


How to run each component in an Asko DW70 dishwasher from the control panel

Posted by Samurai Appliance Repair Man, in Dishwasher Repair 20 June 2013 · 1,212 views
Asko, dishwasher, test and 1 more...
A powerful and indispensable troubleshooting technique to use when working on any modern appliance with a computer control board is to run the self test built into the control board. Almost all control boards used in appliances today have some type of self test. The trick is knowing the key dance to get into it. The other trick is knowing how to interpret the results.

Brother PDuff shares with us the key dance for putting an Asko DW70 dishwasher into self test mode where you can activate each component in the dishwasher individually. This makes quick work of checking each component to see if it's operating correctly.

To access component test:

1) Turn off the main power switch.
2) Wait at least 5 seconds.
3) Press and hold the Program and Start buttons.
4) Switch on the main power switch.
5) Release the Program and Start buttons.

Press Program button to activate component test.
(These components are activated in order after each button press)

1) Inlet valve and mixer valve (mixer valve open 1 second then inlet valve open, after next press of Program button both valves closed then only inlet valve open)
2) Salt water valve
3) Combi dispenser
4) Circulation pump
5) Circulation pump and element
6) Fan and wax motor
7) Drain pump



Source: Asko DW Reoccurring Problem With Basepan Float Switch


Service Pointer: Whirlpool - Kitchenaid dishwasher runs partway thru cycle, cancel-drains then shuts off

Posted by Samurai Appliance Repair Man, in Dishwasher Repair 08 June 2013 · 1,215 views
Whirlpool, kirchenaid, dishwasher and 1 more...
This is a tricky one and can bite you in the rumpus if you don't know about this quiet little Whirlpool Service Pointer on this problem that Brother Chat_in_FL snagged and posted for us:

Service Pointer
W10398386

Serial Numbers: F032 to F105

Customer Concern:
Dishwasher stops approximately 10 minutes into the cycle, “cancel drains” and goes directly to standby mode (off).

Cause:
Testing has determined that cycle stopping may result from a software error that can cause a false error code that cancels the cycle. Techs will see a 6-1 error code recorded in service diagnostics. This issue is very sporadic, and is affected by the location of the household and region of the country. Other conditions that may also cause this “cancel drain” cycle are: siphoning through the drain hose, severe sudsing, and debris in the sump.

Correction:
If the customer experiences a “cancel drain” issue, first check the following:
1. Make sure the dishwasher is installed according to installation instructions provided with the unit.
2. Check for water siphoning out through the drain hose. Ensure that the drain hose end termination point is above the water level in the tub. The drain loop attached to the side of the tub is not sufficient to prevent siphoning.
3. Check for severe sudsing or a malfunctioning Rinse Aid dispenser.
4. Check for locked rotor in wash pump.
5. Check for and remove debris in the bottom of the sump/chopper area.
6. Check for water supply and proper water level in the dishwasher.
7. If all the above checks are OK, then the control will need to be replaced with one that has the upgraded software designed to handle any additional power variation. See chart below for part numbers. Testing has determined that cycle stopping may result from a software error that can cause a false error code that cancels the cycle. Techs will see a 6-1 error code recorded in service diagnostics. This issue is very sporadic, and is affected by the location of the household and region of the country. Other conditions that may also cause this “cancel drain” cycle are: siphoning through the drain hose, severe sudsing, and debris in the sump.

Replace with Part Number
W10380685


Revised control board: http://www.repaircli...0380685/1938381



Source: Kitchenaid Dishwasher KUDS30IXBL0 runs partway thru cycle then cancels & drains






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