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Maytag MDC4650AW Series Service Manual

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Service
This manual is to be used by qualified appliance
technicians only. Maytag does not assume any
responsibility for property damage or personal
injury for improper service procedures done by
an unqualified person.
Convertible
This Base Manual covers general information
Refer to individual Technical Sheet
for information on specific models
Dishwasher
This manual includes, but is
not limited to the following:
MDC4650AW*
16026945
March 2006

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Summary of Contents for Maytag MDC4650AW Series

  • Page 1 Service This manual is to be used by qualified appliance technicians only. Maytag does not assume any responsibility for property damage or personal injury for improper service procedures done by an unqualified person. Convertible This Base Manual covers general information...

  • Page 2: Important Information

    Important Notices for Servicers and Consumers Maytag will not be responsible for personal injury or property damage from improper service procedures. Pride and workmanship go into every product to provide our customers with quality products. It is possible, however, that during its lifetime a product may require service.

  • Page 3: Table Of Contents

    Casters ..............19 Inner Door Panel ..........20 Detergent / Rinse Dispenser Mech. and Res..20 Wax Motor Detergent / Rinse Dispenser ....21 Vent ..............21 Door Latch & Switch Holder Assembly ....22 16026945 ©2006 Maytag Services...

  • Page 4: Important Safety Information

    General Information component is to be removed and replaced. This Service Manual describes the operation, • Replace all removed grounding wires before disassembly, troubleshooting, and repair of Maytag ® completing service. Dishwashers. It is intended for use by authorized servicers who troubleshoot and repair these units.
  • Page 5 El no seguir estas blessures graves, l'incendie ou l'électrocution. death, serious injury, fire, or electrical instrucciones podría causar la muerte, lesiones shock. graves, incendios o descargas eléctricas. 16026945 ©2006 Maytag Services...
  • Page 6 à moins que l'appareil ne soit débranché. Les condensateurs de la commande peuvent rester sous tension une fois l'appareil débranché. Le non-respect de ces consignes peut entraîner la mort, des blessures graves, l'incendie ou l' électrocution. 16026945 ©2006 Maytag Services...

  • Page 7: General Information

    Web Site at www.amana.com • For Amana product call 1-800-628-5782 or visit the Web Site at www.amana.com • For Maytag product call 1-800-688-9900 or visit the Web Site at www.maytag.com • For Maytag/Jenn-Air product call 1-800-462-9824 or visit the Web Site at www.maytag.com or •...

  • Page 8: Model Nomenclature

    General Information 16026945 ©2006 Maytag Services...

  • Page 9: Troubleshooting

    Water Valve. Pump Assembly Check assembly for obstructions or restricted movement NOTE: Low water pressure can result in failure of the of parts. Repair and/or replace parts as necessary. Water Valve to close properly. 16026945 ©2006 Maytag Services...

  • Page 10: Poor Washability

    Clean out as needed. Heating Element Check load readings listed on Technical Sheet located Drain Hose behind Toe Panel. Check drain hose for kink or restrictions. Reroute or remove any restriction of drain hose as needed. 16026945 ©2006 Maytag Services...

  • Page 11: Water Leaks

    Check Water Valve circuit. See Technical Sheet for water Pump "O" ring for leaks. valve data located behind toe panel. NOTE: Make sure the pin connectors are making proper contact with pins on the Control Board. 16026945 ©2006 Maytag Services...

  • Page 12: Will Not Wash

    Heating Element Check Heating Element circuit. See data listed on the Technical Sheet, located behind Toe Panel. Manual Function Test See Technical Sheet, located behind Toe Panel. Field Service Test See Technical Sheet, located behind Toe Panel. 16026945 ©2006 Maytag Services...

  • Page 13: Testing Procedures

    NOTE: When checking components or circuit paths for continuity, external wiring should be disconnected to eliminate false readings through external paths. Isolate what you want to test. 16026945 ©2006 Maytag Services...

  • Page 14: Voltage Checks

    The receptacle used for all Maytag products operating on 120 VAC must be properly grounded and polarized. The power cord used on the appliances should be...

  • Page 15: Electrical Tests

    • Always make connection to components before plugging test cord into receptacle. Water Valve Test The Water Valve may be checked without removing it from the Dishwasher. To check the Water Valve for operation, hook up the test cord as follows: 16026945 ©2006 Maytag Services...

  • Page 16: Wax Motor Check- Vent

    The punger should extend (push out) and force the Vent Flap tight against the vent opening in approximately 45-60 seconds. When power is removed from the Wax Motor, the plunger should retract along with the Vent Flap, opening the vent. 16026945 ©2006 Maytag Services...

  • Page 17: Disassembly Procedures

    The Dishwasher Technical Sheet is located behind the Toe Panel. The Schematic Diagram is unique to each model and contains the following: Timing Sequence Chart Load Readings Component Specifications Manual Function Test Field Service Test Electrical Schematic 16026945 ©2006 Maytag Services...

  • Page 18: Wood Top

    5. Remove the 2 front cabinet screws that secure the cabinet to the tub and base. Toe Panel Removal 1. Disconnect power to the machine. 2. The Toe Panel is held by 2 screws, one each side. Remove both screws. 16026945 ©2006 Maytag Services...

  • Page 19: Faucet

    When the dishwasher is not in use, the faucet coupler is stored in a retainer on the rear of the dishwasher cabinet. 1. Disconnect power to the machine. 2. Remove Wood Top, see "Wood Top" removal procedure. 16026945 ©2006 Maytag Services...

  • Page 20: Inner Door Panel

    4. Separate the Inner Door Panel from the Outer Door. 5. Lift the lever again. Now the actuator will lift the Rinse 5. Disconnect wires from the Vent and Dispenser Wax Aid Plunger. Motors before pulling the Inner Door Panel away from the Dishwasher. 16026945 ©2006 Maytag Services...

  • Page 21: Wax Motor Detergent / Rinse Dispenser

    4. To remove the Wax Motor, pry out of retainer. NOTE: It is not necessary to remove Detergent 3. Rotate Vent Cover counter clockwise 1/4 turn and lift Dispenser before removing Wax Motor. off. 16026945 ©2006 Maytag Services...

  • Page 22: Door Latch & Switch Holder Assembly

    Switch Removal 1. Disconnect power to the machine. 2. Remove the Inner Door Panel, see "Inner Door Panel" removal procedure. 3. Remove Door Latch and Switch Holder Assembly. 4. Depress locking tabs and lift switch from holder. 16026945 ©2006 Maytag Services...

  • Page 23: Upper Rack Removal

    6. Lift out Latch Assembly. Removal 7. Remove 4 screws securing Control Panel to Outer 1. Disconnect power to the machine. Door. 2. Remove Wood Top, see "Wood Top" removal NOTE: Facia is susceptible to damage during procedure. reinstallation. 16026945 ©2006 Maytag Services...

  • Page 24: Outer Door

    6. Prop door open, by inserting an object into the 1/8" dia. hole in hinge bracket. Door Hinge and Support Removal 1. Disconnect power to the machine. 2. Remove the Outer Door Panel, see "Outer Door Panel" removal procedure. 3. Remove Cabinet, see "Cabinet" removal procedure. 16026945 ©2006 Maytag Services...

  • Page 25: Door Spring

    Door Spring adjustment Brackets are located on the lower right and left side of the Dishwasher. Spring tension is achieved by positioning the spring in the slots provided. The higher position increases spring tension. 16026945 ©2006 Maytag Services...

  • Page 26: Manifold

    Disengage the snap located on the bottom of the Manifold, locking the Manifold to the Discharge Housing . 5. Slide Manifold back and out of the Pump Assembly. Top Wash Arm Removal 1. Spread locking tabs and remove Wash Arm Retainer. 16026945 ©2006 Maytag Services...

  • Page 27: Lower Wash Arm

    2. Align Air Water Inlet tabs with notches in Tub, and rotate counterclockwise into position. 3. Replace Air Water Inlet Cover inside Tub. Air Water Inlet The Air Water Inlet is located on the left side of the Tub, and mounted to the exterior of Tub. 16026945 ©2006 Maytag Services...

  • Page 28: Door Gasket

    A normal fill is when water makes contact with heating element in bottom of dishwasher. To Check Float Switch 1. Disconnect power to the machine. 2. Perform continuity check of switch across terminals. Closed- Actuator of switch depressed. Open- Actuator of switch released. 16026945 ©2006 Maytag Services...

  • Page 29: Heating Element

    5.0 to 5.5 amps. When used during a wash Tub. cycle, normal amperage is 7.0 to 7.5 amps. 5. Release Heating Element by tipping Heater Support Brackets towards the Tub front corners and rotating until bracket unlocks. 6. Lift element out of Tub. 16026945 ©2006 Maytag Services...

  • Page 30: Thermostats

    4. Remove wires from Valve Solenoid. NOTE: When reinstalling, proper location and wiring of 5. Remove 2 1/4" screws securing Water Valve to Water thermostat(s) is critical. Valve Bracket. 6. Disconnect injector hose at valve outlet. 16026945 ©2006 Maytag Services...

  • Page 31: Checking Valve Operation

    2. Remove Water Valve from the Dishwasher (See Water Valve Removal). 3. Remove 4 screws securing valve body to Water Inlet Mounting Bracket. 4. Clean screen. NOTE: Make sure to reattach the ground wire to the mounting bracket. 16026945 ©2006 Maytag Services...

  • Page 32: Drain Pump

    Wash Motor Assembly The Wash Motor Assembly is designed to provide recirculating, filter, wash and particle chopping functions for the dishwasher cycles. Removal 1. Disconnect power to the machine. 2. Remove racks. 16026945 ©2006 Maytag Services...
  • Page 33 13. Remove 3 Torx™ screws to remove Chopper Plate. 14. Lift off Chopper 15. Remove Chopper Sleeve by using Impeller as a wrench. Lock motor rotation using the access hole provided in back of motor. 16. Lift off Seal Seat Assembly. 16026945 ©2006 Maytag Services...
  • Page 34 NOTES 16026945 ©2006 Maytag Services...
  • Page 35 Appendix A 16026945 A–1 ©2006 Maytag Services...
  • Page 36 NOTES 16026945 ©2006 Maytag Services...
  • Page 37 Use a rinse agent to improve drying results and minimize Do not place glasses over rack tines. This water spotting. interferes with wash action. 16026945 ©2006 Maytag Services...
  • Page 38 NOTES 16026945 ©2006 Maytag Services...
  • Page 39 The Use and Care information provided in this service manual is representative of a limited number of models. Reference the customer’s Use and Care literature included with the product, order a copy, or consult the manufacturer’s website for the specific model (www.maytag.com). 16026945 B–1 ©2006 Maytag Services...
  • Page 40 NOTES 16026945 ©2006 Maytag Services...
  • Page 41 Loading ....4 Dishwasher Use ... . .5 Cycles, Options and Lights ....6-7 16026945 ©2006 Maytag Services...

  • Page 42: Important Safety

    Underwriter’s Laboratories, Inc. – those with a CSA tag have been listed with Canadian Standards Association. Nevertheless, as with any other equipment using electricity and moving parts, there is a potential hazard. 16026945 ©2006 Maytag Services...

  • Page 43: What Can And Cannot Be Washed

    Run a Rinse Only cycle (select models) if not washing Silverplate immediately. Prolonged contact with food containing salt, acid or sulfide (eggs, mayonnaise and seafood) could damage finish. Commercial “darkening” may be removed by detergent. Wooden Items Wood may warp, crack or discolor. 16026945 ©2006 Maytag Services...

  • Page 44: Operating Tips

    “locked in” after 1 minute. Note : If the cycle select pad is pressed after the controls have been “locked in”, the light above the current cycle will flash three times. Lower Rack 16026945 ©2006 Maytag Services...

  • Page 45: Loading

    For best cleaning results, prevent with one of the water inlet items from nesting together by holes on back wall of the placing some items in the basket dishwasher. with handles up and some with handles down. On models with 16026945 ©2006 Maytag Services...

  • Page 46: Dishwasher Use

    In extremely hard water conditions (13 grains per best results. Replace the cap and turn it clockwise to gallon or more*), it is difficult to achieve good close. results with any dishwasher. A mechanical water 16026945 ©2006 Maytag Services...
  • Page 47 Starts and stops dishwasher. See page 3 under Operating Tips: All Cycles START/Cancel Operating the Dishwasher, for explanation. Used to automatically start the cycle at a later time. See page 7 All Cycles Delay for instructions. 16026945 ©2006 Maytag Services...
  • Page 48 This could happen if the cycle is interrupted, power failure occurs or incoming water temperature is below 120° F (49° C). • The CLEAN and SANITIZED indicator lights (select models) will not relight after a power failure until after the next cycle is run. B-10 16026945 ©2006 Maytag Services...

  • Page 49: Care And Cleaning

    To When turning the water supply to the home off, the drain, press the START/Cancel pad once to activate water shut off at the dishwasher must be turned off also. 16026945 B-11 ©2006 Maytag Services...

  • Page 50: Portable Dishwashers

    Do not slide ceramic or other hard or abrasive objects across the surface. * Brand names are the trademarks of the respective manufacturer. B-12 16026945 ©2006 Maytag Services...

  • Page 51: Troubleshooting

    • Follow directions closely on how to add a forgotten item (pg. 3). • To avoid rinse aid leaking from the dispenser, be sure the lid is securely attached. Cont. *Brand names are trademarks of the respective manufacturer. 16026945 B-13 ©2006 Maytag Services...
  • Page 52 Use a dishwasher detergent that contains chlorine to better fight staining. • Certain dishwasher detergents may stain silver. Try another brand of detergent. *Brand names are trademarks of the respective manufacturer. Cont. B-14 16026945 ©2006 Maytag Services...
  • Page 53 • Sanitization may not be achieved if there is an interruption of the cycle, power failure or if incoming water temperature is below 120° F (49° C). *Brand names are trademarks of the respective manufacturer. 16026945 B-15 ©2006 Maytag Services...

  • Page 54: Warranty & Service

    FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES. SOME STATES AND • If the dealer or service company cannot resolve the problem, write to Maytag PROVINCES DO NOT ALLOW THE Services, LLC, Attn: CAIR ®...

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