Maytag MDC4650AW Series, Service Manual

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©2006 Maytag Services
16026945 11
Thermostat
Check mating surface of the High Limit Thermostat face
to surface of tub enclosure. Contact area must be flat.
Adjust the thermostat placement if necessary. See
Technical Sheet, located behind Toe Panel for thermostat
data.
Water Leaks
Installation
Check Dishwasher for proper leveling and squareness in
cabinet.
Door Alignment
Check proper alignment of Door Liner to Door Gasket.
Door Gasket
Check for torn or damaged Door Gasket. Repair or
replace as necessary.
Hoses
Check for loose hose clamps or hoses that leak. Tighten
hose clamps or replace hoses as needed.
Spray Arms / Manifold
Check for cracks and replace as necessary.
Detergent / Rinse Aid Dispenser Seal
Check Rinse Aid Dispenser Seal for proper positioning or
cracking. Reposition or replace as needed.
Water Valve
Check Water Valve body for damage and leaks. Replace if
necessary. Also, check plumbing connections to Water
Valve.
Wash Motor Assembly
Check for water leak between Pump Assembly and tub.
Drain Pump Assembly
Check Pump Assembly Housing for cracks. Check Drain
Pump "O" ring for leaks.
Troubleshooting
!
WARNING
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit and discharge
capacitor through a 10,000 ohm resistor before attempting to service, unless test procedures require power to be
connected. Ensure all ground wires are connected before certifying unit as repaired and/or operational.
Noise
Banging
Check for loose Spray Arms. Check for dishes interfering
with Spray Arm rotation. See loading information in the
User's Guide at the end of this manual.
Hammering/Chattering
Check Water Valve for noise, low voltage, or high valve
coil resistance. Replace Water Valve if needed. Also,
check incoming water supply line for proper size and
pressure. Make sure the supply line is secured.
Grinding
Check for objects in Pump Assembly. If objects are
found, inspect Pump Assembly for damage. Repair as
needed.
Vibration
Check components for source of vibration. Adjust and/or
tighten as needed.
Will Not Start Or Program
Control Board
Check incoming voltage to Control Board.
Membrane Switch
Check for proper operation of Membrane Switch. See
membrane readings on the Technical Sheet located
behind toe panel.
NOTE: Make sure the pin connectors are making proper
contact with pins on the Control Board. If the
voltage is correct into the Control Board, and the
board will not activate, replace board.
Will Not Fill
Water Valve
Check Water Valve circuit. See Technical Sheet for water
valve data located behind toe panel.
NOTE: Make sure the pin connectors are making proper
contact with pins on the Control Board.