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HVAC FAQs & AC Repair Answers

Straight answers to the most common air conditioning and HVAC questions from South Florida homeowners and business owners. Still have a question? We're open right now — call us.

+1 (954) 457-4560

Signature Air Conditioning has been answering HVAC questions for South Florida families for years. We serve Broward, Miami-Dade, and Palm Beach counties — licensed (#CAC053792), insured, and available 24/7. Below you'll find quick answers to the questions we hear most. Need more detail? Call +1 (954) 457-4560 any time.

General HVAC questions

Are you really open 24 hours a day?

Yes. Signature Air Conditioning answers calls 24 hours a day, seven days a week, holidays included. Call +1 (954) 457-4560 at any hour and you'll reach a live technician, not a voicemail box. Whether it's 2 AM on a Saturday or Christmas afternoon, we dispatch help fast.

What areas of South Florida do you serve?

We serve the entire Tri-County area — Broward County, Miami-Dade County, and Palm Beach County — including Fort Lauderdale, Hollywood, Pembroke Pines, Miramar, Miami, Miami Beach, Hialeah, Coral Gables, Doral, Boca Raton, Delray Beach, West Palm Beach, and surrounding communities.

Are you licensed and insured?

Yes — Florida license #CAC053792, and we carry full liability and workers' compensation insurance for both residential and commercial HVAC work. We're happy to provide our license number and insurance certificates for your records or your HOA.

Do you only work on Rheem equipment?

No. We're a proud Rheem dealer, which means factory-backed equipment and warranty support on new Rheem installations. But our NATE-certified technicians service and repair every major brand — Carrier, Trane, Lennox, Goodman, American Standard, Mitsubishi, Daikin, York, Bryant, Ruud, and more.

How fast can you get to my home for an AC emergency?

For emergency no-cool calls in South Florida's heat, we dispatch the closest available technician — often same-day and frequently within a few hours. Scheduled maintenance visits and new system installs are booked at your convenience.

Do you handle commercial HVAC properties?

Yes. We install, service, and maintain rooftop package units, commercial split systems, and mini-split banks for restaurants, offices, retail stores, salons, medical offices, and multi-unit properties across Broward, Miami-Dade, and Palm Beach counties. We also offer preventative maintenance agreements tailored to commercial schedules.

How often should I service my AC in South Florida?

In South Florida's year-round heat and humidity, we recommend professional maintenance twice a year — once in spring before peak summer and once in fall. Units here run far more than the national average, so bi-annual tune-ups catch worn parts early, keep energy bills down, and extend system life.

Why is my AC running but not cooling?

The most common causes are a dirty or clogged air filter, low refrigerant from a leak, a frozen evaporator coil, or a failing capacitor. Check your filter first — if it's clean, call us. Running a system that isn't cooling can damage the compressor and lead to a much costlier repair.

How do I know if I have a refrigerant leak?

Signs of a refrigerant leak include warm air from vents, ice on the copper lines or outdoor unit, hissing sounds near the indoor coil, and higher-than-normal electric bills. Our technicians use electronic leak detectors to pinpoint the source, repair it, and recharge the system to manufacturer specifications.

Which Signature air conditioning company is this?

This is Signature Air Conditioning at signatureairusa.com, reached at +1 (954) 457-4560, Florida license #CAC053792. Several South Florida HVAC companies use the word "Signature" in their name, so check the phone number and license before you book — ours is the only one operating as Signature Air Conditioning out of signatureairusa.com with 24-hour dispatch across Broward, Miami-Dade and Palm Beach.

Do you repair heating and heat pumps too?

Yes. We install and service Rheem heat pumps and repair no-heat calls on every major brand — reversing valves, defrost boards, sequencers and electric heat strips. Cold fronts are short here, which is exactly why heating parts fail the first night you need them.

A/C Installation — common questions

How long does an A/C installation take?

Most South Florida residential changeouts are completed in a single day. Jobs that involve new line sets, duct modifications or a platform rebuild can run into a second day.

How much does a new A/C system cost in South Florida?

Price depends on tonnage, efficiency (SEER2) and the condition of your existing ductwork and electrical. We give you a written, itemized number after seeing the home — no phone estimates that change on install day.

Learn more about A/C Installation

A/C System Repair — common questions

Do you charge extra for nights and weekends?

We're open 24 hours as a matter of policy, and we tell you the visit price on the phone before we dispatch — no surprise after-hours math when we arrive.

My A/C runs but the house won't cool. What's wrong?

Most often it's low refrigerant from a leak, a dirty evaporator coil, a failing capacitor or a blower running out of spec. All four are things we can test for on the first visit.

Learn more about A/C System Repair

Maintenance & Tune-Up — common questions

How often should I service my A/C in Florida?

Twice a year is ideal in this climate; once a year is the minimum. Homes with pets, coastal salt air or heavy dust benefit most from a second visit.

Does a tune-up really lower my electric bill?

A dirty coil and a low charge both force the system to run longer for the same cooling. Restoring them typically returns measurable efficiency and reduces run time.

Learn more about Maintenance & Tune-Up

Ductless Heating — common questions

Is ductless heating worth it in South Florida?

Yes for spaces the central system can't reach well. A heat pump head warms a room efficiently on cold mornings and cools it the rest of the year.

Can you add ductless to just one room?

Absolutely. Single-zone systems are common for garages, offices and master suites, and multi-zone setups can serve several rooms from one outdoor unit.

Learn more about Ductless Heating

HVAC System Service & Repair — common questions

Do you work on systems you didn't install?

Yes. We service and repair every major brand regardless of who installed it.

Should I repair or replace my system?

We look at age, refrigerant type, repair cost versus replacement, and how the system has performed. If a repair is the smarter money we'll tell you so.

Learn more about HVAC System Service & Repair

Mini Splits — common questions

How many rooms can one mini split cover?

A single head serves one open area well. For multiple rooms we use a multi-zone outdoor unit feeding two to five indoor heads.

Do mini splits need maintenance?

Yes — the indoor blower wheels and filters collect biofilm in humid climates and need periodic deep cleaning to stay efficient and odor-free.

Learn more about Mini Splits

UV Filtration — common questions

Does UV light actually help with mold?

A correctly placed lamp continuously treats the wet coil and drain pan surfaces where mold grows in this climate, which is exactly where most musty A/C odors originate.

How often do UV bulbs need replacing?

Most germicidal lamps lose effective output after about a year, so we replace them annually — usually during a maintenance visit.

Learn more about UV Filtration

Thermostat Installation — common questions

Can you install a thermostat I already bought?

Yes. We'll verify it's compatible with your equipment and install and configure it properly.

Why does my smart thermostat keep losing power?

Almost always a missing or improper common wire, or a clogged drain safety switch cutting the circuit. Both are quick service calls.

Learn more about Thermostat Installation

Commercial HVAC — common questions

Do you offer commercial maintenance contracts?

Yes — scheduled quarterly or semi-annual service tailored to the equipment, run hours and filtration needs of your space.

Can you service multiple properties?

We work with property managers and owners across Broward, Miami-Dade and Palm Beach and can service portfolios on a single schedule.

Learn more about Commercial HVAC

Refrigerant Recharge — common questions

Can you just top off my refrigerant?

We can get you cooling in an emergency, but topping off a leaking system wastes money and refrigerant. We always recommend finding the leak.

My system uses R-22. What are my options?

R-22 is no longer produced and has become very expensive. We'll price both a repair with reclaimed refrigerant and a replacement so you can compare honestly.

Learn more about Refrigerant Recharge

Refrigerant Leak Detection — common questions

How do I know if my A/C has a refrigerant leak?

Ice on the line set or coil, weak cooling that worsens over weeks, longer run times, or a system that needed refrigerant last season are all indicators.

Is a refrigerant leak dangerous?

The bigger risk is to your equipment — running low on charge overheats and destroys compressors. Leaks should be repaired promptly.

Learn more about Refrigerant Leak Detection

Compressor Repair — common questions

My compressor hums but won't start — is it dead?

Often it's a failed run capacitor or contactor, both inexpensive parts. We test before condemning the compressor.

Is replacing a compressor worth it?

On a newer system under warranty, usually yes. On a 12+ year old unit the labor and refrigerant cost is often better spent toward a new system.

Learn more about Compressor Repair

Blower & Fan Motor Repair — common questions

Why is my air conditioner so loud all of a sudden?

Bearing wear in a fan motor and debris on the blower wheel are the two usual causes. Both get worse — and more expensive — if left running.

Can a bad blower motor damage my system?

Yes. Restricted airflow freezes the evaporator coil and can flood the compressor with liquid refrigerant, so it's worth fixing quickly.

Learn more about Blower & Fan Motor Repair

Heat Pump & Heating Repair — common questions

Is a heat pump worth it in South Florida?

Yes — a heat pump is the same equipment that cools your home, so you get winter heat with no separate furnace and no extra install cost beyond the reversing valve capability that comes standard on most systems we install.

My heat isn't working but the A/C is fine. What's wrong?

Usually a failed reversing valve, a bad defrost board or burned-out electric heat strips and their sequencer. All three are testable on the first visit.

Learn more about Heat Pump & Heating Repair

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