Whirlpool Washer WTW4800BQ0 Service Manual

The Whirlpool WTW4800BQ0 is a high-efficiency top-load washer with 3.5 cu. ft. capacity, featuring multiple wash cycles, stainless steel wash basket, automatic temperature control, deep water wash option, and energy-efficient operation. This service manual provides comprehensive information for technicians including technical specifications, disassembly procedures, troubleshooting guides, and maintenance instructions.

1. Technical Specifications 2. Safety Precautions 3. Component Identification 4. Disassembly Procedures 5. Electrical System 6. Mechanical System 7. Control System 8. Troubleshooting Guide 9. Error Codes 10. Maintenance Procedures 11. Parts List

Technical Specifications

Key technical data for the Whirlpool WTW4800BQ0 washer.

SpecificationDetails
Model NumberWTW4800BQ0
Capacity3.5 cubic feet
Dimensions (HxWxD)43.5" x 27" x 27.5"
Voltage120V AC, 60Hz
Current Rating15 Amps
Water Pressure20-120 psi
Motor TypeDirect Drive
Control TypeElectronic
Weight125 lbs
ColorWhite

Safety Precautions

Important safety information for service technicians.

  1. Disconnect power before servicing: Unplug washer or disconnect circuit breaker.
  2. Use proper tools: Ensure tools are in good condition and appropriate for the task.
  3. Wear protective equipment: Safety glasses and gloves recommended.
  4. Secure washer: Ensure washer is stable and won't tip during service.

WARNING! Electrical shock hazard exists even when power is disconnected due to capacitor storage. Always discharge capacitors before servicing.

Component Identification

Major components and their locations within the washer.

Disassembly Procedures

Step-by-step disassembly instructions for major components.

  1. Control Panel Removal: Remove screws from rear of panel, disconnect wiring harness.
  2. Cabinet Disassembly: Remove top panel by releasing front clips, then side panels.
  3. Lid Switch Access: Remove console to access lid switch mechanism.
  4. Motor and Transmission: Remove agitator, then access drive components from bottom.
  5. Pump Removal: Drain water, remove front panel, disconnect hoses and electrical.

CAUTION! Label all wires and take photos during disassembly for proper reassembly.

Electrical System

Electrical components, wiring diagrams, and testing procedures.

ComponentTest ProcedureSpecification
Main Control BoardCheck for proper voltage at connectors120V AC input
Drive MotorOhm test windings2-10 ohms typical
Water Inlet ValveCheck coil resistance500-1500 ohms
Lid SwitchContinuity testClosed when lid down
Temperature SensorResistance checkVaries with temperature

Mechanical System

Mechanical components maintenance and repair procedures.

  1. Agitator Repair: Remove cap, bolt, and lift off agitator for replacement.
  2. Transmission Service: Drain oil, inspect gears, replace seals as needed.
  3. Suspension System: Check springs and dampers for wear or damage.
  4. Bearing Replacement: Requires complete tub disassembly for access.

Tip: Use manufacturer-approved lubricants for all moving parts.

Control System

Electronic control system operation and diagnostics.

Control Board: Processes user inputs and controls all washer functions. Features cycle selection, water temperature settings, spin speed control, and diagnostic mode access.

Diagnostic Mode: Enter by pressing specific button sequence (varies by model). Tests sensors, motors, and valves individually for troubleshooting.

Troubleshooting Guide

Common problems and their solutions.

SymptomPossible CauseCorrective Action
Washer won't startPower issue, lid switchCheck power supply, test lid switch
No water fillingWater valves, pressure switchTest inlet valves, check water pressure
Not drainingPump, drain hoseInspect pump, check for clogs
Excessive vibrationSuspension, load balanceCheck springs, redistribute load
Error codes displayedSensor faultsRefer to error code chart

Error Codes

Diagnostic error codes and their meanings.

Maintenance Procedures

Routine maintenance to ensure optimal performance.

  1. Monthly Cleaning: Run empty cycle with washer cleaner.
  2. Inspect Hoses: Check for cracks or leaks every 6 months.
  3. Clean Filter: Remove and clean pump filter quarterly.
  4. Level Check: Verify washer is level to prevent vibration.

WARNING! Always disconnect power before performing any maintenance.

Parts List

Common replacement parts and their part numbers.

Part DescriptionPart Number
Drive MotorWPW10206370
Main Control BoardWPW10501412
Water Inlet ValveWPW10106341
Lid Switch AssemblyWPW10001603
Drain PumpWPW10106339
AgitatorWPW10206372
Suspension SpringWPW10106345
TransmissionWPW10206371

Service Support: 1-800-253-1301; www.whirlpool.com/parts

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