Basics of air conditioning and refrigeration

Importance of AC in homes, offices, and industries

Types of air conditioning systems (window, split, central, portable, inverter ACs)

Role and responsibilities of an AC technician

Essential hand tools (spanners, gauges, cutters, flaring tools, etc.)

Power tools used in AC installation and servicing

Safety practices (electricity, refrigerants, working at heights)

Personal protective equipment (PPE)

Principles of refrigeration and heat transfer

Components of a refrigeration cycle: compressor, condenser, expansion valve, evaporator

Types of refrigerants (R22, R410A, R32) and environmental concerns

Understanding cooling capacity (BTU & tons of refrigeration)

Indoor unit: evaporator, filters, blower, sensors

Outdoor unit: compressor, condenser, fan motor

Refrigerant piping and insulation

Electrical components: capacitors, contactors, relays, PCB boards

Pre-installation site inspection and planning

Mounting indoor and outdoor units (brackets, vibration control)

Copper pipe cutting, flaring, and brazing

Electrical wiring and connections

Routine maintenance: filter cleaning, coil cleaning, drain line flushing

Checking and topping refrigerant gas

Measuring voltage, current, and pressure with gauges/multimeters

Common faults (low cooling, water leakage, unusual noise) and troubleshooting

Compressor testing and replacement basics

Fan motor issues and capacitor testing

PCB and sensor faults in inverter ACs

Replacing faulty refrigerant pipes and repairing leaks

Starting an AC installation and servicing business

Pricing jobs and writing quotations

Customer service and relationship management

Seasonal business opportunities (installation, maintenance contracts)

Marketing strategies (online/offline, referrals, partnerships)