Air Conditioning Cleaning Course

Lesson 1 • Key Components and Their Functions

Identifies filters, coils, fans, drain pans, and blower assemblies and explains each component's role. Provides the anatomical map technicians reference during inspection and cleaning.

Lesson 2 • How Air Conditioning Systems Work

Covers the refrigeration cycle and heat transfer principles underlying all AC units. Establishes the mechanical context needed for every cleaning task in this course.

Lesson 3 • Why Cleaning Affects System Performance

Explains how dirt accumulation degrades efficiency, airflow, and equipment lifespan. Connects cleaning outcomes to measurable energy savings and reduced breakdown rates.

Lesson 1 • Job Site Assessment and Preparation

Covers pre-job walkthroughs, hazard identification, and workspace protection setup. Proper preparation reduces rework, protects client property, and speeds up cleaning operations.

Lesson 2 • Personal Protective Equipment Selection

Covers gloves, respirators, eye protection, and coveralls appropriate for chemical and biological hazards. Correct PPE selection is the first line of defence on every cleaning job.

Lesson 3 • Regulatory and Compliance Overview

Summarises occupational health standards, refrigerant handling regulations, and environmental disposal rules. Compliance knowledge protects technicians and clients from legal liability.

Lesson 4 • Electrical Safety Around AC Units

Teaches lockout/tagout procedures and safe isolation of power before cleaning. Prevents electrocution and equipment damage during all subsequent hands-on tasks.

Lesson 1 • Vacuum and Blower Equipment

Introduces HEPA vacuums, air blowers, and duct cleaning equipment for debris removal. Correct vacuum use captures contaminants rather than redistributing them into the air.

Lesson 2 • Tool Maintenance and Storage

Establishes cleaning, inspection, and storage routines that extend tool life and ensure readiness. Well-maintained tools reduce job delays and prevent cross-contamination between sites.

Lesson 3 • Pressure Washing and Spray Equipment

Teaches correct use of low-pressure sprayers, foaming guns, and portable washers for coil flushing. Pressure control prevents coil damage and ensures thorough chemical penetration.

Lesson 4 • Diagnostic and Measurement Tools

Covers thermometers, anemometers, moisture meters, and UV leak detectors used to verify cleaning results. Measurement tools confirm performance improvement after each cleaning job.

Lesson 1 • Chemical Waste Disposal and Spill Response

Establishes procedures for neutralising, containing, and disposing of chemical waste after cleaning. Correct disposal prevents environmental harm and satisfies regulatory requirements.

Lesson 2 • Matching Chemicals to Surfaces

Teaches compatibility between chemical formulas and aluminium, copper, galvanised steel, and plastic components. Mismatched chemicals corrode coils and void equipment warranties.

Lesson 3 • Categories of AC Cleaning Chemicals

Distinguishes alkaline coil cleaners, acid-based descalers, enzymatic agents, and disinfectants by chemistry and use case. Chemical category knowledge prevents surface damage and ineffective cleaning.

Lesson 4 • Dilution, Dwell Time, and Application

Covers correct dilution ratios, dwell times, and application methods for maximum cleaning effectiveness. Proper technique reduces chemical waste and prevents residue buildup on components.

Lesson 1 • Drain Pan and Condensate Line Cleaning

Teaches flushing, descaling, and disinfecting drain pans and condensate lines to prevent blockages. Blocked drains cause water damage and biological growth that degrades indoor air quality.

Lesson 2 • Filter Types and Removal Procedures

Covers mesh, HEPA, electrostatic, and activated carbon filters and their correct removal sequences. Safe removal prevents filter damage and avoids releasing trapped contaminants into the room.

Lesson 3 • Cleaning Evaporator Coils in Indoor Units

Applies coil cleaner selection, foam application, and rinse procedures to indoor evaporator coils. Clean evaporator coils restore cooling capacity and prevent mould growth on the coil surface.

Lesson 4 • Washing and Drying Filters

Teaches water temperature, pressure, and drying time requirements for washable filter types. Incorrect washing degrades filter media and reduces particle capture efficiency.

Lesson 1 • Outdoor Unit Inspection and Shutdown

Covers pre-cleaning inspection of condenser fins, fan blades, and refrigerant lines before power isolation. Thorough inspection identifies damage that cleaning alone cannot resolve.

Lesson 2 • Debris Removal and Coil Preparation

Teaches removal of leaves, dirt, and biological growth from condenser fins before chemical application. Mechanical debris removal maximises chemical contact with coil surfaces during cleaning.

Lesson 3 • Chemical Cleaning of Condenser Coils

Applies alkaline or acid-based cleaners to condenser coils with correct dwell times and rinse sequences. Proper chemical cleaning removes scale and oxidation that block heat transfer.

Lesson 4 • Condenser Fan and Housing Cleaning

Covers cleaning condenser fan blades, motor housing, and top grille to restore full airflow volume. Dirty fan assemblies reduce condenser efficiency and increase compressor discharge pressure.

Lesson 1 • Duct Sanitisation and Sealing

Covers application of EPA-registered duct sanitisers and sealants after mechanical cleaning is complete. Sanitisation eliminates residual biological contamination and sealants prevent future debris entry.

Lesson 2 • Air Handling Unit Cleaning

Applies coil, drain pan, and blower cleaning procedures to large air handling units in commercial settings. AHU cleaning directly impacts the air quality delivered to entire building zones.

Lesson 3 • Grille, Register, and Diffuser Cleaning

Covers removal, soaking, scrubbing, and reinstallation of supply and return grilles and diffusers. Clean grilles prevent re-contamination of ducts and improve room air distribution.

Lesson 4 • Mechanical Duct Cleaning Methods

Teaches rotary brush, air whip, and skipper ball techniques for dislodging duct deposits. Mechanical agitation is the primary method for removing compacted dust and debris from ducts.

Lesson 1 • Documenting Cleaning Work

Covers before-and-after photos, measurement logs, and chemical usage records for professional service reports. Thorough documentation protects technicians legally and supports client maintenance planning.

Lesson 2 • Post-Cleaning Inspection Standards

Establishes visual and measurement-based checklists for verifying cleaning completeness before job closeout. Systematic inspection catches missed areas and prevents callback visits.

Lesson 3 • Identifying and Reporting Additional Faults

Teaches technicians to recognise refrigerant leaks, electrical faults, and mechanical wear found during cleaning. Reporting additional faults adds value and positions the technician as a trusted advisor.

Lesson 4 • Client Handover and Maintenance Advice

Covers structured handover conversations, filter replacement schedules, and usage tips for clients. Clear maintenance guidance reduces system neglect and generates repeat service business.