Maytag 1999 Sloped-Front, Service Manual

Page: 69 / 102

© 2000 Maytag Appliances Sales Company
16023110
Section 9. Dryer Controls Overview
9-17
MDE/MDG7500, MDE/MDG9800
exit diagnostic/
help codes
clear
help codes
cycle count
xxxx
Diagnostic Codes
Code Description Trigger Action Taken
1 Dryer Thermistor
Short Sensed The
thermistor
resistance is
very low,
with a
temperature
> 175
degrees. Check for:
- Clogged lint
screen.
- Restricted
vent system.
Failed thermistor.
2
Thermistor Open
Sensed The
thermistor
resistance is
very high Check for:
- Low ambient
temperature in
room (Below
50oF/10oC).
- Outside vent
damper is stuck
open in
wintertime.
Loose or open wire
terminals
3 Door Circuit
Failure Invalid state
for more
than 256
milliseconds Check for:
- Loose or open wire
terminals in Door
Sense circuit.
4 Possible motor
transistor error If either
motor
transistor is
seen open or
shorted
during
startup Check for:
- Loose
connections in
motor circuit.
- Run System
Check Mode
and check the
motor relay
function.
- If relay
functions,
disregard the
diagnostic
code.
If relay does not
function, replace
machine control
board.
5 Not Used
6
Non Volatile
Memory Problem
Detected
with integrity
of
parameters
stored in
EEPROM
memory. Disregard
Code Description Trigger Action Taken
8 Stuck Key A key is
sensed to be
pressed
more than
75 seconds,
the key shall
be assumed
to be stuck. Run membrane pad
check and replace
console w/membrane
pad if necessary.
Membrane Pad Continuity Checks
Note:
Unplug connector and touch probe of meter to the
appropriate pin numbers. Meter will show infinity on
open keys and continuity on closed keys.
Membrane
Pad
Pin Number Pin Number
Home J7(3) J7(5)
Favorites J7(4) J7(5)
Back J7(3) J7(6)
Start/Pause J7(4) J7(7)
Off J7(3) J7(7)
Help J7(4) J7(6)