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How to test the touchpanel keyswitch contacts in a Maytag MDB dishwasher

Posted by Samurai Appliance Repair Man, in Dishwasher Repair 04 September 2011 · 1,449 views

Master Reg lays out the drill:

Checking keyswitch contacts:

Unplug dishwasher or disconnect power.
Remove connector P1 from the control board.
Using the table below,
http://appliantology...-ii-dishwasher/
measure the resistance across the switch when the key is pressed.
NOTE: The meter must be connected with the proper polarity.
This test will not work on models with a “touch sensor” type user interface.
The resistance reading should go from infinity (open circuit) with the key open
down to a readable Ω 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.

KeyPad assembly
click on picture
Posted Image


Part links:

W10240046 Black
W10240047 White
W10240048 Biscuit


Source: Maytag mdb6709aws0 dishwasher inop.




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