South Florida AC Repair Guide, what to know first.
A plain-English guide to how AC repair actually works — the common failures, when a repair is worth it, and how to choose a company you can trust. Written for South Florida homeowners by the team that has done the work since 1998.
The repairs South Florida sees most.
Because our systems run nearly year-round, they wear in predictable ways. Understanding the common failures will not turn you into a technician, but it will help you describe the problem clearly and recognize when a quote sounds off.
Failed Capacitor
A small cylinder that gives the motors their starting jolt. When it fails, the unit may hum but not start, or the fan will not spin. It is one of the most common and least expensive AC repairs there is.
Low Refrigerant & Leaks
If a system is low on refrigerant, there is a leak — it is a sealed loop that should never run dry. A proper repair finds and fixes the leak, rather than just topping it off to fail again in a month.
Worn Fan Motor
Both the indoor blower and outdoor fan motors wear out over years of constant running. Warning signs include new noises, weak airflow, or a system that overheats and shuts itself off.
Clogged Condensate Drain
Air conditioning pulls water out of the air, and that water drains away through a line that loves to clog with algae. A backup shuts many systems down on purpose — and can leak onto your floors or ceiling.
Control Board & Contactor
The electronics that tell the system what to do. A failed contactor or control board can leave a unit dead or behaving erratically, and diagnosing it correctly is where real experience matters.
Thermostat Faults
Sometimes the AC is fine and the thermostat is the problem — dead batteries, bad wiring, or a failing unit sending the wrong signals. A good technician rules this out before touching the expensive parts.
This is an overview, not a repair manual — refrigerant and electrical work require a licensed professional for safety and warranty reasons.
When repair stops
making sense.
Most AC systems last around 12 to 15 years in our climate. A repair on a young system is almost always worth it; on one near the end, the same repair may just delay an inevitable replacement.
A useful rule of thumb: multiply the repair cost by the system’s age. If the result is high relative to a new system, replacement starts to make more financial sense than another patch.
An older, repeatedly-repaired unit is also costing you more every month in electricity. Sometimes the smart money is a modern, efficient system that pays part of itself back on the bill.
Educational guidance for South Florida homeowners — and a free, honest in-home read whenever you want real numbers.
How to spot a repair company worth trusting.
The repair matters, but so does who does it. A trustworthy AC company shares a few traits — and knowing them protects you from the outfits that inflate problems or vanish after the invoice.
- A state license you can verify (in Florida, a CAC number)
- The price in writing before the work begins
- An honest read on repair versus replace, not a default upsell
- A real local track record and reviews you can read
The two questions that separate a trustworthy company from a costly one cost nothing to ask: what is your state licence number, and what is the price in writing? Both should be answered before a technician opens a panel, not after the invoice arrives.
United is a licensed (CAC1817263), family-owned South Florida company — and we are glad to give an honest second opinion on any quote you are holding.
Questions and answers
How do I know if my AC needs repair or just maintenance?
If it has stopped cooling, is making new noises, leaking, or short-cycling, that is a repair. If it is running but you want it checked, cleaned, and kept efficient, that is maintenance. When in doubt, describe the symptom to a technician — they will tell you which it is.
Why does my system keep needing refrigerant?
Because it has a leak. Refrigerant runs in a sealed loop and is never consumed, so if the level keeps dropping, it is escaping somewhere. A proper repair locates and seals the leak rather than repeatedly refilling a system that will just lose it again.
How long should an AC repair last?
A quality repair on a sound system should last for years. If the same part or problem keeps recurring, either the underlying cause was never fixed or the system is nearing the end of its life — both worth an honest conversation with your technician.
What is the most common AC repair?
A failed capacitor is among the most common and least expensive. The system may hum without starting, or the fan will not spin. It is a quick fix for a technician — and a common thing for less-scrupulous companies to inflate, so knowing about it helps.
Is it ever unsafe to keep running a broken AC?
Yes. Keep it off if it is frozen over, tripping the breaker repeatedly, or producing a burning smell — running it in those states can cause serious damage or a fire hazard. When in doubt, shut it down and call a professional.
How do I choose a trustworthy repair company?
Look for a verifiable state license (a CAC number in Florida), a price in writing before work starts, an honest take on repair versus replace, and a real local track record with reviews you can read. Those four traits filter out most of the bad actors.
Should I get a second opinion on a big repair?
Absolutely, especially if a quote feels high or you are being pushed toward a full replacement. A reputable company will gladly give an honest second read — we do it for free — and it can save you a great deal of money.
How do I get a repair booked?
Open the assistant from any button and tell it what your system is doing. It gathers the basics and passes you to a real person, who lines up a licensed technician and locks in a time. You never fill out a form or wait for a callback.
How we know this
This advice comes from what our technicians actually find on service calls in Broward County and southern Palm Beach — not from national HVAC copy. Salt-air corrosion on the barrier island, drain lines that block every wet season, and equipment running nine months a year are local realities, and they change the right answer.
Worth disclosing: we install Amana equipment, so we are not an independent reviewer. Where a brand or product is discussed we say what it is good and bad at, and we will tell you when the honest answer is to repair what you have or do nothing yet.
Talk to a technician
Have a question this raised? The assistant answers what it can, takes your details, and hands you to a real person who confirms the day and time.