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Straight answers about air conditioning in South Florida

How air conditioners work, why they fail here, and how to make good decisions about repair and replacement, without the sales pitch.

FL license CAC1821225 · Licensed in Florida (DBPR)

Close-up of a technician holding a clamp meter while testing an outdoor unit
Technician testing wiring inside an outdoor condenser's electrical compartment with a multimeter
Service Shield technician kneeling at an outdoor unit, reaching into the service panel

The parts of a central AC system

Most of the guides refer to these parts. Here's where each one is and what it does.

How a split air-conditioning system worksSchematic: inside the house, an air handler with an evaporator coil and blower cools indoor air; a thermostat on the wall controls it; a condensate drain carries water away from the coil. Two copper refrigerant lines, the line set, run through the wall to the outdoor condenser, where the compressor and condenser coil release the heat outside.INSIDEOUTSIDEAIR HANDLERCONDENSER123456
Parts of the diagram

Tells the system when to run. Many "the AC is broken" calls turn out to be a setting, a dead battery or a wiring fault here.

More on thermostat

The indoor unit. The blower moves air across the cold coil, which cools it and pulls water out of it.

More on air handler and evaporator coil

Carries the water away. In Broward humidity, a clogged drain is one of the most common service calls.

More on condensate drain

Two copper refrigerant lines between the indoor and outdoor units.

The compressor and outdoor coil push the heat from inside the house out into the yard.

More on outdoor condenser

Refrigerant travels to the indoor coil as a liquid and comes back as a cool gas carrying the heat it picked up from your house.

All guides

Filter by topic. Every guide is written for South Florida homes.

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Have a question a guide didn't answer?

Ask a technician. Describe what your system is doing, or send a photo of the unit, the thermostat or a fault code through Text a Tech, and we'll help you work out the next step.

Florida license CAC1821225

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