Mdb7449aww1 Parts

Overfill control.

This cap secures the dishwasher wash arm to its support, helping keep the arm properly positioned so water jets can spin and spray effectively for consistent cleaning performance.

• Holds the wash arm in place on its hub/support
• Can help address a loose, wobbly, or detached wash arm
• Replacing a damaged or missing cap can restore stable arm rotation

• Disconnect power and turn off water before service
• Remove the lower rack for access; lift off the wash arm
• Unscrew/press off the old cap; seat and secure the new cap
• Ensure the wash arm spins freely by hand before reassembly

This electronic control board is the appliance's central controller. It interprets user inputs and sensor feedback to run cycles and coordinate components. Replacing a failed board can restore proper operation and responsive controls. What it does:

• Manages the timing and sequence of operations based on selected settings
• Interprets signals from the user interface and internal sensors
• Directs power to components via onboard electronics
• Monitors system status and may store/output diagnostic error codes
• Common failure symptoms: won't start, unresponsive or blank display, stuck/erratic cycles, or recurring error codes after a power reset

• Disconnect power to the appliance before servicing; verify no voltage is present
• Use ESD protection and handle the PCB by edges only
• Photograph/label connectors and move them one at a time to the new board to prevent miswiring
• Inspect wiring, fuses, and related components for shorts or damage and correct any root cause before powering the new board; follow the unit's tech sheet for any required post-install setup

Color: White. 4oz bottle with brush used for touching up damage to your dishracks. For blue use W10840471. For grey use WP676455. For tips use 675679

This factory-specified screw secures panels, brackets, and internal components in your appliance. Replacing worn or missing hardware restores a tight fit to help reduce vibration, noise, and premature wear.

• Fastens sheet metal, brackets, or plastic parts as designed by the manufacturer
• Helps maintain alignment and reduce vibration/rattling
• Direct replacement for stripped, corroded, or missing screws
• Common signs: loose panels or trim, shifting components, screw won't tighten

• Disconnect power; shut off water or gas supply if applicable
• Use the correct driver to avoid stripping the head
• Start threads by hand to prevent cross-threading; tighten snugly without overtightening
• Replace one-for-one in the original location per service information

This inlet protector is the coarse screen that covers the dishwasher's pump/sump inlet, blocking large debris from entering the wash system. Replacing a damaged or missing protector helps maintain water flow and protect the pump from jams or wear.

• Screens large food particles and debris from the pump/chopper inlet
• Helps maintain proper water circulation and consistent cleaning performance
• Reduces risk of pump damage or noisy operation from debris
• Common signs: cracked or missing screen, persistent debris in the sump, grinding/rumbling noises, or declining wash results

• Disconnect power and shut off water supply before servicing
• Remove the lower rack and spray arm; access the sump/accumulator area per your model
• Lift out the old protector; seat the new protector fully and secure any tabs/fasteners
• Reassemble and ensure the screen sits flat with no gaps

Seal included. This sump housing assembly includes a 32.17 millimeter hole for the thermistor. If the hole for the thermistor is 31-31.5 millimeters you will need to order WP8534882.

Pivoting hinge tine clip. Color: Blue. Measures about a 1/2 inch high by 4 inches deep.

This replacement part is a dishwasher pump and motor assembly. The dishwasher pump and pump motor circulate water through the dishwasher's spray arm. When the spray arms aren't spraying properly, this could mean that it's time for a new pump and motor assembly. Luckily replacing this part is a relatively simple process.Start by making sure the dishwasher is unplugged. After that shut off the water supply going to the dishwasher. Then disconnect the drain line from the garbage disposal or sink drain. Open the dishwasher door and pull out the bottom dish rack. Remove the upper dishrack from its track. Release the spray arm on the bottom of the washer. Then proceed to release the feed tube clips. Using a nut driver remove the bottom access panel and tow panel. Pull them out to remove them. Remove the power cable from the junction box, and disconnect the supply line from the inlet valve. Proceed to pull the dishwasher out of the counter. Tilt the dishwasher on its side and pull the hose from the drain pump. Remove the wire harness from the pump. Disconnect wires from diverter motor and circulation motor. Once complete, proceed to tilt the dishwasher upright and remove the pump and motor assembly from the bottom of the dishwasher. Replace with the new assembly.This replacement part is compatible with Whirlpool, Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Sears/Kenmore brand dishwashers.

This wax motor is the actuator for the dishwasher's rinse aid dispenser, releasing rinse agent at the correct time in the cycle. Replacing a weak or failed unit restores consistent rinse aid dispensing and helps minimize spotting.

• Actuates the rinse aid dispenser by extending a plunger when energized
• Works with the control to meter rinse aid during the final rinse
• Failure symptoms can include rinse aid not dispensing, the level never dropping, and increased spotting/filming on dishes
• Dispenser may remain closed with no audible actuation during the cycle

• Disconnect power at the breaker and shut off water before servicing
• Remove the door panel to access the dispenser; label and disconnect wires
• Release the old motor and install the new one in the same orientation, ensuring it seats fully
• Run a test cycle to ensure the dispenser releases rinse aid

This overfill float and shaft assembly monitors the dishwasher's water level. As the tub fills, the float rises and triggers the float switch to shut off the inlet water, helping prevent overfilling and leaks.

• Senses tub water level and moves up/down with the water
• Activates the float switch to stop filling at the correct level
• Helps protect against overfill-related leaks
• Common symptoms include: won't fill (float stuck up), continuous filling/overfilling (float stuck down or damaged), or float not moving freely

• Disconnect power and turn off the water supply before servicing
• Lift the old float straight up from inside the tub; access the underside (behind the toe panel) as needed to release the shaft from the float switch lever
• Install the new shaft through the guide and onto the switch lever; seat the float so it moves freely
• Verify smooth float movement and test a fill cycle while checking for leaks

Dishwasher rack mounting strip roller.

This replacement shield fits over the heater/probe area to provide a protective barrier. It helps prevent direct contact and excessive radiant heat exposure, protecting nearby components and supporting accurate temperature sensing for consistent operation. What it does:

• Shields the heating element and adjacent temperature probe/sensor area
• Helps prevent heat damage to nearby plastics, wiring, and components
• Reduces the chance of items contacting or striking the heater/probe
• Common signs it's needed: cracked, warped, or missing shield; discoloration; rattling or an exposed probe/heater area

• 1 shield

• Disconnect power and allow all heated parts to cool before servicing
• Access the heater/probe area and note the original shield orientation
• Seat the shield fully; secure with existing clips/fasteners if applicable
• Verify clearances around the heating element before restoring power

Bottle with brush. Color: Black. Size: 0.6 fl.oz.

This compression tube nut secures water inlet tubing to a threaded fitting to create a reliable, leak-resistant seal. Replace a cracked or stripped nut to stop drips at the connection and keep your appliance's water system working properly.

• Compresses the tubing against the fitting to seal the water line at the inlet valve, filter head, or other water-system connections
• Helps correct leaks at the water line connection point
• Replaces nuts that are cracked, cross-threaded, or deformed
• Common symptoms: water dripping at the connection, difficulty tightening the line, or a poor seal after reassembly

• Shut off the water supply and disconnect power before servicing.
• Slide the nut onto the tubing first, seat the tube fully on the fitting, then hand-tighten and snug with a wrench; do not overtighten.
• Inspect and reuse the existing sleeve/ferrule and tube insert if in good condition; replace if worn.
• Restore water and check for leaks at the connection.

Color: light gray. Measures about 3 inches high by 6 inches deep.