Troubleshooting Guide - Whirlpool MVWC450XW4 Manual

FOR SERVICE TECHNICIAN'S USE ONLY

TROUBLESHOOTING GUIDE

Some tests will require accessing components. See Figures 7 & 8, page 19, for component locations.
For detailed troubleshooting procedures, refer to "Troubleshooting Tests" beginning on page 12.
PROBLEM
WON'T POWER UP
• No operation
• No Status LEDs
WON'T START CYCLE
No response when
Start Button is pressed.
UI WON'T ACCEPT
SELECTIONS
WON'T FILL
OVERFILLS
WON'T AGITATE
WON'T SPIN
PAGE 10
NOTE: Always check for error codes first (pgs. 6–7).
POSSIBLE CAUSE
No power to washer.
Connection problem between AC
plug and main control.
Main control not properly installed
in console.
Main control problem.
Lid lock mechanism not functioning.
User Interface problem.
Main control problem.
User Interface problem.
Main control problem.
No water supplied to washer.
Plugged filter/screen.
Drain hose installation.
Valve problem.
Main control problem.
Pressure hose.
Valve problem.
Washer requires calibration.
Pressure switch or onboard
transducer.
Main control problem.
Water covering impeller?
Is lid lock showing open during
the cycle?
Drive belt.
Harness connections.
Shifter problem.
Motor problem.
Tachometer problem.
Main control problem.
Is lid lock showing open during
the cycle?
Drive belt.
Harness connections.
Shifter problem.
Motor problem.
Tachometer problem.
Main control problem.
CHECKS & TESTS
Check power at outlet, check circuit
breakers, fuses, or junction box connections.
Check the AC power cord for continuity.
See TEST #4: Console and Indicators,
page 16.
See TEST #1: Main Control, page 12.
1. Lid not closed due to interference.
2. Lock not closed due to interference.
3. See TEST #8: Lid Lock, page 18.
See TEST #4: Console and Indicators,
page 16.
See TEST #1: Main Control, page 12.
See TEST #4: Console and Indicators,
page 16.
See TEST #1: Main Control, page 12.
1. Check water connections to washer.
2. Verify hot and cold water supply is on.
Check for plugged filter or screen in the
water valve or hoses.
Check for proper drain hose installation.
See TEST #2: Valves, page 13.
See TEST #1: Main Control, page 12.
See TEST #6: Water Level, page 17.
See TEST #2: Valves, page 13.
Perform washer calibration on page 4.
See TEST #6: Water Level, page 17.
See TEST #1: Main Control, page 12.
See TEST #6: Water Level, page 17.
See TEST #8: Lid Lock, page 18.
Verify that drive belt is not damaged.
Check harness connections between main
control and drive system.
See TEST #3a: Drive System–Shifter,
page 13.
See TEST #3b: Drive System–Motor,
page 14.
No tub movement or tub speed out of normal
range (obstruction/belt/motor).
See TEST #1: Main Control, page 12.
See TEST #8: Lid Lock, page 18.
Verify that drive belt is not damaged.
Check harness connections between main
control and drive system.
See TEST #3a: Drive System–Shifter,
page 13.
See TEST #3b: Drive System–Motor,
page 14.
No tub movement or tub speed out of normal
range (obstruction/belt/motor).
See TEST #1: Main Control, page 12.
DO NOT REMOVE OR DESTROY