Troubleshooting Guide #1 - Maytag MHW9000YW0 Mode D'emploi

FOR SERVICE TECHNICIAN'S USE ONLY

TROUBLESHOOTING GUIDE #1

PROBLEM
WON'T POWER UP
• No operation
• No keypad response
• No LEDs or display
WON'T START CYCLE
No response when Start
Button is pressed.
UI WON'T ACCEPT
SELECTIONS
DOOR WON'T LOCK
DOOR WON'T UNLOCK
(See p. 25 for manually
unlocking the door lock
system.)
WON'T DISPENSE
WON'T FILL
(Normal water level is
only 2.5" to 5" [63.5 mm
to 127 mm] inside tub.)
OVERFILLS
DRUM WON'T ROTATE
MOTOR OVERHEATS
SANITIZE LED DOES
NOT TURN ON
DO NOT REMOVE OR
POSSIBLE CAUSE
No power to washer.
Connection problem between AC plug
and CCU.
Connections between CCU and UI.
CCU problem.
User interface problem.
Door has not been opened for 3
consecutive cycles.
Door lock mechanism not functioning.
Connections between CCU and UI.
User interface problem.
CCU problem.
Connections between CCU and UI.
User interface problem.
CCU problem.
Door not closed.
Door lock obstructed.
Door lock mechanism not functioning.
Manually unlock door and reset washer.
Misaligned, broken, or over-tightened
door latch.
Door lock mechanism not functioning.
No water supplied to washer.
Dispenser clogged with detergent.
Valve problem.
Dispenser system problem.
Detergent pump problem.
No water supplied to washer or low
water pressure.
Plugged filter/screen.
Drain hose installation.
Valve problem.
Pressure sensor problem.
Drain hose/filter is plugged.
Valve(s) not shutting off.
Pressure sensor problem.
Drain pump problem.
Is door lock showing open during
the cycle?
Harness connections.
Motor problem.
Mechanical friction.
Harness connections.
Motor problem.
No hot water dispensed.
Temperature sensor problem.
Heater element problem.
DESTROY
CHECKS & TESTS
Check power at outlet, check circuit breakers,
fuses, or junction box connections.
Check connections between the AC power
cord and CCU for continuity.
Check connections and harness continuity
between CCU and UI.
See TEST #1: CCU Power Check, pg. 13.
See TEST #2: User Interface, pg. 14.
Open and close door. Verify that cycle starts.
1. Door not closed due to interference.
2. Lock not closed due to interference.
3. See TEST #4: Door Lock System, pg. 16.
Check connections and harness continuity
between CCU and UI.
See TEST #2: User Interface, pg. 14.
See TEST #1: CCU Power Check, pg. 13.
Check connections and harness continuity
between CCU and UI.
See TEST #2: User Interface, pg. 14.
See TEST #1: CCU Power Check, pg. 13.
Ensure that door is completely closed.
Check mechanism for obstruction.
See TEST #4: Door Lock System, pg. 16.
Manually unlock door and then disconnect
and reconnect power. Check door lock.
Check door lock mechanism and repair as
necessary.
See TEST #4: Door Lock System, pg. 16.
1. Check water connections to washer.
2. Verify hot and cold supply is on.
Clean obstruction from dispenser.
See TESTS #6 & 16 (Inlet & Diverter Valves).
See TEST #12: Dispenser Distribution System,
pg. 20.
See TEST #14: Detergent Pump, pg. 22.
1. Check water connections to washer.
2. Verify hot and cold supply is on.
Check for plugged filter or screen in the water
valve or hoses.
Check for proper drain hose installation.
Is water siphoning out of the drain hose?
See TESTS #6 & 16 (Inlet & Diverter Valves).
See TEST #7: Pressure Sensor, pg. 17.
Check for hose and drain filter obstructions.
See TEST #6: Water Inlet Valves, pg. 17.
See TEST #7: Pressure Sensor, pg. 17.
See TEST #8: Drain Pump, pg. 18.
See TEST #4: Door Lock System, pg. 16.
Check harness continuity and connections
between CCU > MCU > and drive motor.
See TEST #3: Motor Circuit, pg. 15.
Check for obstruction between spin basket
and outer tub.
Check harness continuity and connections
between CCU > MCU > and drive motor.
See TEST #3: Motor Circuit, pg. 15.
Ensure that household hot water is present
at the tap. Minimum 120°F (49°C).
See TEST #11: Temperature Sensor, pg. 19.
See TEST #10: Heating Element, pg. 19.
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