Maytag MAT12PDSA Technical Information page 9

Component Testing Procedures
To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
Washer
diagnostic
Program
Yes
Does hot water run when "H" is in
between water valves, pressure
Warm water runs when "Ch" is in
December 2003
!
No user program should be in
progress. The lid should be
closed and the washer tub
should be empty before running
this test.
With entire display blinking on
and off, if any segments of the
entire display are not working,
replace the control board.
Does cold water run when "C"
is in the display?
Does hot water run when "C" is
in the display?
No
If washer will not fill, agitate or
spin, unplug washer and check for
continuity of lid switch.
the display?
Check wiring and terminations
switch and control board.
Yes
Replace water valve.
the display.
Yes
WARNING
Enter operator mode using service
switch. Push the delicates and
knits program keypad for more
than one second.
Push the woolens program
keypad to start the diagnostic
program.
Yes
Push the woolens program keypad
No
to stop / start the diagnostics in the
current phase.
The hoses may be crossed or
Yes
the water valve miswired.
Does switch check closed with
lid closed?
Push the woolens program keypad
No
to stop / start the diagnostics in
the current phase.
Does 115VAC appear between the
brown and red wires on connector
AA7?
Yes
Does 115VAC appear between the
blue and red wires (cold water
Yes
check) or orange and red wires
(hot water check) on the control
board edge connector AA7?
9
Does "C" appear in the
display?
No
Does "A" appear in the
display?
Water level looks full; Go
to "A".
Adjust lid switch or replace
No
switch if necessary.
Yes
Check water shutoff valves,
filter screens and hose routing.
Replace pressure switch or
No
hose.
No
Replace control board
16022846 Rev 0