Question 1

Why is my AC running but not cooling the house?

Accepted Answer

The four most common causes in Florida are a dirty condenser coil, low refrigerant from a leak, a failing capacitor, or a frozen evaporator coil. The system keeps running because the fan and blower still work, but it can't actually move heat out of the house. Start by replacing a dirty filter and checking that the outdoor unit isn't clogged with grass and dirt. If it still won't cool, the charge or a component is the issue and needs a technician.

Question 2

How do I reset my air conditioner?

Accepted Answer

Turn the thermostat OFF, then switch the AC breaker in your electrical panel to OFF for 30 seconds and back ON. Wait 30 minutes before turning the thermostat back to COOL, many units have a built-in delay that protects the compressor. Some outdoor units also have a red reset button near the service panel. If the system trips again right after resetting, stop resetting it and call a pro; repeated resets on a faulting system can damage the compressor.

Question 3

Why is my AC blowing warm air?

Accepted Answer

Warm air usually means the system can't complete the cooling cycle: low refrigerant, a tripped outdoor breaker, a dirty condenser coil, a failed capacitor, or a thermostat set to HEAT or the fan set to ON instead of AUTO. On a heat pump, a stuck reversing valve can leave it in heat mode. Check the thermostat and breaker first, those are free fixes, then have the refrigerant charge and capacitor tested.

Question 4

Why is my AC leaking water inside the house?

Accepted Answer

A clogged condensate drain line is the number one cause in Florida, humidity produces gallons of water a day, and algae blocks the drain so it backs up around the air handler. Other causes are a rusted drain pan, a frozen coil that's thawing, or a disconnected drain line. Shut the system off to prevent ceiling or floor damage, then clear the drain. Pouring a cup of white vinegar into the drain access every couple of months prevents most of these calls.

Question 5

Why is my AC freezing up with ice on the lines?

Accepted Answer

Ice forms when the coil gets too cold, from restricted airflow (dirty filter, closed vents, weak blower) or low refrigerant. Turn the system OFF and set the fan to ON to thaw it for 2-4 hours, then replace the filter. If it freezes again with a clean filter, the refrigerant charge or blower is the problem. Never run a frozen system, it can slug the compressor with liquid refrigerant and destroy it.

Question 6

Why does my AC smell musty or like mildew?

Accepted Answer

That 'dirty sock' smell is almost always microbial growth on the evaporator coil or standing water in the drain pan, extremely common in Florida humidity. A coil cleaning plus a UV germicidal light stops it at the source instead of masking it. A burning or electrical smell is different and more urgent: shut the system off and call right away.

Question 7

Why is my AC making a loud noise?

Accepted Answer

The sound tells you a lot: buzzing often means an electrical or capacitor issue, grinding points to a failing motor bearing, screeching can be a belt or motor, rattling is usually loose hardware or debris in the outdoor unit, and a loud hum with a fan that won't spin is a classic bad capacitor. Banging or clanking from the compressor is serious. Shut the unit off and have it inspected before a small part failure takes out something expensive.

Question 8

Why does my AC keep tripping the breaker?

Accepted Answer

A breaker trips to protect against too much current, so don't just keep resetting it. Common causes are a dirty condenser coil making the compressor work too hard, a failing capacitor or compressor, a shorted wire, or a weak breaker. If it trips immediately on reset, there's likely an electrical short or a seized compressor, leave it off and call a technician, because repeated trips can worsen the damage and create a fire risk.

Question 9

Why won't my AC turn on at all?

Accepted Answer

Work from simplest to most involved: a dead thermostat battery, a tripped breaker, a blown low-voltage fuse, a full condensate pan tripping the safety float switch, or a failed contactor or transformer. In Florida, a clogged drain triggering the float switch is a very common 'AC completely dead' cause. Check the thermostat, breaker, and drain pan first; if those are fine, it's an electrical component.

Question 10

What temperature should I set my AC to in Florida summer?

Accepted Answer

78°F when you're home is the efficiency sweet spot recommended by the U.S. Department of Energy, and every degree cooler adds roughly 6-8% to your cooling bill. Set it a few degrees higher when you're away. If 78 feels sticky, the real culprit is humidity, not temperature, a properly sized, well-maintained system pulls humidity down so 78 feels comfortable. Chronic high humidity usually means an oversized system or one that needs service.

Question 11

How often should I change my AC filter in Florida?

Accepted Answer

Every 30-60 days for a standard 1-inch filter, and monthly if you have pets, allergies, or run the system hard, which almost everyone does in Florida's long cooling season. A clogged filter is the root cause behind frozen coils, weak airflow, and burned-out blower motors, making it the cheapest breakdown insurance there is. Thick 4- to 5-inch media filters last 6-12 months.

Question 12

How long does an AC unit last in Florida?

Accepted Answer

Typically 10-15 years in Florida, versus 15-20 up north, our heat, humidity, and near-year-round runtime wear systems out faster, and salt air near the bay shortens it further. Annual maintenance is the single biggest factor in reaching the long end of that range. If your system is past 10 years, needs a major repair, and uses older R-22 refrigerant, replacement usually makes more financial sense than another repair.

Question 13

Should I repair or replace my AC?

Accepted Answer

A simple rule: multiply the repair cost by the system's age in years. If that number is under about $5,000, repair it; if it's over, start pricing a replacement. Also lean toward replacement if the system is 10+ years old, uses discontinued R-22 refrigerant, or has needed several repairs recently. We give a straight answer either way and offer financing when a new system genuinely makes sense, we don't push replacements you don't need.

Question 14

What SEER2 rating do I need in Florida?

Accepted Answer

Florida's minimum for new systems is 14.3 SEER2, but because we run AC so many months a year, stepping up to 15-17 SEER2 pays back faster here than almost anywhere in the country through lower power bills. Very high SEER2 (18+) systems cost more upfront and make sense mainly for large homes or long-term owners. We'll show you the real payback math for your home rather than just selling the biggest number.

Question 15

Why does my AC keep turning on and off (short cycling)?

Accepted Answer

Short cycling, the system starting and stopping every few minutes, is hard on the compressor and drives up bills. Causes include a dirty filter or coil, low refrigerant, an oversized system, a bad capacitor, or a thermostat placed in a hot spot or in direct sun. Change the filter first; if it continues, the charge, capacitor, or sizing needs a professional look before the frequent starts wear out the compressor.

Question 16

Why is my electric bill so high in the summer?

Accepted Answer

Air conditioning is the biggest driver of a Florida summer power bill, and a system that's dirty, low on refrigerant, or leaking cool air through bad ductwork can quietly add 20-30% to it. Common fixes: a tune-up to clean the coil and correct the charge, sealing leaky attic ducts, changing the filter, raising the thermostat to 78, and adding attic insulation. A one-time tune-up often pays for itself in a couple of billing cycles.

AC Troubleshooting: The Top Questions Floridians Ask