Washer and Dryer Repair Course

Lesson 1 • Workspace Organization and Parts Management

Teaches bench layout, parts labeling, and safe chemical storage for a repair shop. An organized workspace reduces errors and speeds every repair job.

Lesson 2 • Hand and Power Tool Mastery

Identifies and demonstrates correct use of screwdrivers, nut drivers, pliers, and power drills. Builds tool confidence needed for every disassembly task ahead.

Lesson 3 • Diagnostic Instruments and Meters

Introduces multimeters, clamp meters, and continuity testers for appliance diagnostics. Accurate meter use underpins every electrical fault-finding procedure in the course.

Lesson 4 • Electrical Safety Principles

Covers shock hazards, lockout/tagout procedures, and safe voltage testing. Grounds all subsequent hands-on work in non-negotiable safety practices.

Lesson 1 • Washer Internal Architecture

Identifies tub, drum, agitator, pump, motor, and cabinet structures in top-load and front-load washers. Provides the anatomical map used in every subsequent washer repair chapter.

Lesson 2 • Electrical Circuits and Wiring Diagrams

Explains voltage, current, resistance, and Ohm's Law as applied to appliance circuits. Students trace live and neutral paths on actual wiring diagrams by section end.

Lesson 3 • Safe Disassembly and Reassembly Procedures

Demonstrates panel removal, harness disconnection, and component extraction without damage. Correct disassembly sequence prevents secondary damage during every repair.

Lesson 4 • Dryer Internal Architecture

Identifies drum, heating element, blower, motor, and exhaust path in gas and electric dryers. Establishes the structural baseline for all dryer diagnostic and repair tasks.

Lesson 1 • Electrical Component Testing Techniques

Applies resistance, continuity, and voltage-drop tests to switches, motors, and solenoids. Each test method is matched to the component type for accurate fault isolation.

Lesson 2 • Error Code Interpretation

Decodes manufacturer error codes on digital displays and retrieves service mode data. Error codes accelerate diagnosis but must be cross-referenced with physical testing.

Lesson 3 • Repair vs. Replace Decision Framework

Evaluates part cost, labor time, appliance age, and failure probability to guide repair decisions. A sound decision framework protects customer trust and shop profitability.

Lesson 4 • Symptom-Based Diagnostic Thinking

Translates customer complaints into testable hypotheses using a structured symptom tree. Prevents random part replacement and focuses testing on the most probable causes.

Lesson 1 • Suspension and Damper System Repair

Replaces suspension rods, springs, and damper pads that control drum movement during spin. Worn suspension causes excessive vibration, noise, and unbalanced-load errors.

Lesson 2 • Drive Belt and Pulley Service

Inspects, tensions, and replaces drive belts and idler pulleys on belt-driven washer models. Correct belt tension prevents slipping, overheating, and premature motor wear.

Lesson 3 • Drain Pump Service and Replacement

Clears blockages, tests impeller rotation, and replaces drain pumps in top-load and front-load washers. A failed pump causes standing water and triggers error codes.

Lesson 4 • Tub Bearing and Seal Replacement

Extracts and replaces tub bearings and front seals in front-load washers using press tools. Bearing failure causes loud rumbling and eventual shaft damage if left unaddressed.

Lesson 1 • Motor and Motor Control Board Service

Tests motor windings, capacitors, and control board outputs to isolate drive system faults. Motor and board failures share symptoms, requiring systematic electrical testing.

Lesson 2 • Water Inlet Valve Diagnosis and Replacement

Tests solenoid coils, screens, and flow rates on hot and cold inlet valves. A faulty inlet valve causes no-fill, slow-fill, or continuous-fill faults.

Lesson 3 • Timer and Selector Switch Replacement

Diagnoses mechanical timers and cycle selector switches using wiring diagrams and continuity tests. Timers govern every cycle phase, so faults cause incomplete or skipped cycles.

Lesson 4 • Lid Switch and Door Latch Repair

Tests and replaces lid switches on top-load washers and door latch assemblies on front-load models. These safety interlocks prevent spin and fill when open.

Lesson 1 • Start Switch and Door Switch Repair

Tests and replaces push-to-start switches and door switches that control motor activation. A failed door switch prevents the dryer from running as a safety measure.

Lesson 2 • Drum Support and Glide Replacement

Inspects and replaces drum support rollers, glides, and felt seals that maintain drum alignment. Worn supports cause squealing, thumping, and uneven tumbling.

Lesson 3 • Heating Element Diagnosis and Replacement

Tests element resistance, identifies open coils, and replaces heating elements in electric dryers. A failed element is the most common cause of a no-heat complaint.

Lesson 4 • Dryer Motor and Belt Replacement

Diagnoses motor start windings, centrifugal switches, and idler pulleys, then replaces belts and motors. Belt breakage stops drum rotation while motor failure stops all movement.

Lesson 1 • Burner Assembly and Exhaust System Service

Cleans burner tubes, inspects orifices, and verifies exhaust duct flow for safe combustion. Restricted exhaust is the leading cause of thermal fuse failure in gas dryers.

Lesson 2 • Flame Sensor and Radiant Sensor Testing

Tests radiant sensors and flame sensors that control gas valve coil activation during the heat cycle. A failed sensor causes the burner to light briefly and then shut off.

Lesson 3 • Gas Safety and Combustion Fundamentals

Reviews gas supply shutoff, leak detection, and combustion principles before any burner work. No gas component repair proceeds without mastering these non-negotiable safety steps.

Lesson 4 • Gas Valve and Coil Assembly Service

Tests primary and secondary gas valve coils and replaces the coil kit or full valve assembly. Coil failure prevents gas flow even when the igniter glows correctly.

Lesson 1 • Wiring Harness Repair and Fabrication

Splices, re-pins, and heat-shrinks damaged wiring harnesses to factory specification. Harness repair avoids costly full-harness replacement and restores reliable electrical connections.

Lesson 2 • Multi-System Failure Analysis

Diagnoses appliances with simultaneous mechanical, electrical, and control failures using a layered approach. Complex failures require isolating each system before forming a repair plan.

Lesson 3 • Final Quality Assurance and Customer Handoff

Runs full wash and dry cycles, verifies all functions, and prepares a written repair summary for the customer. A structured handoff builds trust and reduces callback rates.

Lesson 4 • Intermittent Fault Diagnosis Strategies

Uses thermal cycling, vibration simulation, and extended run tests to reproduce intermittent failures. Intermittent faults are the hardest to diagnose and require methodical stress testing.