Warm air, ice on the coil, the unit shutting off, or water under the air handler — this guide covers all four. Florida tenants encounter A/C issues more than most, and most of them have a simple, safe first step.
Estimated time to work through: ~15 minutes
STOP — Burning smell, melting plastic, sulfur smell, or smoke from the air handler?
Turn the system off at the thermostat AND at the breaker immediately. Submit an emergency maintenance request or call the tenant maintenance line at (321) 203-0567. A persistent burning electrical smell from an HVAC unit is a fire-warning sign. If you see smoke or flame, call 9-1-1 first.
STOP — Standing water under the air handler, dripping onto outlets or wiring?
Water + electricity is a shock hazard. Turn the system off at the thermostat AND at the breaker. Place towels to contain the water. Do not stand in the water. Submit a maintenance request immediately.
Never open the outdoor unit, the air handler cabinet, or the disconnect box.
The outdoor condenser runs on a 240V circuit and the disconnect box on the wall next to it carries lethal voltage. Capacitors inside the unit can hold a 370–600V charge even after power is off — only a licensed HVAC technician should open these. The same goes for the indoor air handler cabinet and the disconnect box.
Never run the A/C with a frozen coil.
If you see ice on the indoor coil or on the copper refrigerant lines, turn the system off at the thermostat immediately. Running the system frozen can damage or destroy the compressor — a several-thousand-dollar repair that a single missed-shutoff can cause. Let it thaw for at least 1–4 hours (or longer for a complete thaw). Then troubleshoot.
Refrigerant lines run between the indoor and outdoor units. Refrigerant is invisible and can cause asphyxiation in confined spaces or frostbite on skin contact. Do not touch refrigerant lines, valves, or service ports under any circumstances.
A central air conditioner does two jobs at once: it cools the air, and it pulls moisture out of the air. In Florida, both of those jobs run on overtime. Statewide average humidity sits at about 74% and climbs above 90% in summer. The A/C runs 16+ hours a day for 7 or 8 months of the year, ripping gallons of moisture out of the air every day. Algae and sludge grow in the warm, dark, wet condensate drain line two to three times faster than they would in a dry climate. Coastal salt air corrodes copper coil fins. Hurricane season blows debris and rain into outdoor units. Summer heat stresses every electrical component.
Most A/C problems Florida tenants encounter trace back to one of four root causes: a dirty air filter restricting airflow, a clogged condensate drain line, debris around or inside the outdoor unit, or an electrical component beginning to fail. The first three you can often handle yourself. The fourth — and anything you're not sure about — is a maintenance request.
Work through these in order. Each step takes one to three minutes. If a step resolves the issue, you're done. If you reach Step 10 and the A/C still isn't working, submit a maintenance request. If your specific symptom needs an extra check beyond the main flow, see the symptom sub-flows in the next section.
Set it to Cool, not Heat, Off, or Fan Only. Set the setpoint below the room temperature (try 5°F lower than the current reading). Set the fan to Auto — not On (On runs the blower constantly even when the system isn't cooling, which can make the air feel warm between cycles). If the screen is dim or blank, replace the batteries.
If you see ice or frost anywhere on the indoor unit or on the copper refrigerant lineset, turn the system off at the thermostat right now. Do not skip this step and do not run the system — you can destroy the compressor. Let it thaw at least 1–4 hours (you can switch the thermostat to Off with Fan set to On to speed thawing). Then continue with the rest of the flow.
If water is dripping or pooled under the air handler, turn the system off at the thermostat. Place towels or a shallow pan to catch the water. If the water is near outlets or wiring, also turn off the breaker. This is almost always a clogged condensate drain line, which Step 7 can resolve — but the system must be off first.
Find the filter (usually behind a grille on a wall or ceiling — sometimes inside the air handler closet door). Pull it out. If it's gray, matted, or sagging, replace it with the same size and same MERV rating. A clogged filter is the single most common cause of every A/C symptom this guide covers.
Open every supply register (the vents air blows OUT of). Make sure no furniture, curtains, rugs, or stored items are blocking the return-air grille (the big vent that air is sucked INTO — usually near the floor or low on a wall). Restricted airflow chokes the system and can freeze the coil.
Look for breakers labeled "A/C," "Condenser," "Air Handler," or "HVAC." Reset any tripped breaker once by flipping it fully OFF, waiting 10 seconds, then back ON.
If the breaker trips again immediately — stop. Do not try a third time. A breaker that won't hold is signaling a serious electrical fault. Submit a maintenance request.
Stop here if… the breaker trips again immediately after one reset — that signals a serious electrical fault and needs a licensed technician.
If your property manager has shown you where the white PVC condensate drain-line cleanout is (often near the air handler or outside the home), pour 1/4 cup of distilled white vinegar into it. Wait 30 minutes. Flush with 2 cups of warm water. This kills the algae that clogs Florida drain lines.
If you've never been shown the cleanout, skip this step — submit a maintenance request and we'll handle the drain line. Don't open inspection panels you haven't been shown.
Walk around to the outdoor unit. Is the fan on top spinning when the system is calling for cooling? Are leaves, palm fronds, grass clippings, or debris pressing against the sides? Clear visible debris from a 2 to 3 foot radius around the unit by hand.
Do not open the unit, do not spray water into it, do not touch the disconnect box on the wall next to it. Just clear the area.
After the fixes above, give the system time to recover. A frozen coil takes longer — 1 to 4 hours minimum to thaw fully. Once thawed, start the system back up at a normal setpoint and let it run.
Is the air coming out of the supply vents cold? Has the symptom stopped? If yes — you're done. If no, submit a maintenance request through the tenant portal with: the original symptom, what you tried from this guide, what's still happening, any noises or smells, and photos if it's safe to take them. The more information you give us, the faster the right technician is on the way.
After the main 10 steps, here are the specific checks for each of the four symptoms this guide covers. Match yours and try the extra steps.
After working through Steps 1, 4, 5, 6, and 8, walk back out to the outdoor condenser and listen. If you hear a hum but the top fan isn't spinning, or you hear a clicking sound when the system tries to start but it doesn't, that's almost always a failed capacitor or contactor — submit a maintenance request. Also check: is the outdoor condenser breaker tripped separately from the indoor air handler breaker? Many Florida homes have two separate HVAC breakers.
The system must be off for at least 1–4 hours to thaw (longer if the ice is thick — sometimes overnight). Switch the thermostat to Off and the fan to On to speed thawing. Once thawed, change the air filter, confirm all vents are open, and confirm the return-air grille isn't blocked. Restart and watch for ice to return. If it freezes again within 24 hours, it's almost always low refrigerant or a dirty coil — both require a technician. Submit a maintenance request.
Short cycling (cycles under ~10 minutes) is often a tripped float switch — a small safety sensor that cuts power when the drain pan fills up. The vinegar-in-the-drain-line step (Step 7) clears the cause about 90% of the time in Florida. If short cycling continues after a clean filter and clear drain, it's likely electrical (capacitor, contactor, control board) — submit a maintenance request.
Turn the system off immediately (Step 3). Place a pan or towel. Run the vinegar drain-line flush (Step 7). Wait an hour. If water has stopped, run the system on a low setpoint and watch the drain pan area for two hours. If the leak doesn't return, you may be in the clear — but report it to Sea Dog anyway so we can schedule a drain-line professional cleaning. If water continues after the flush, or if you see water near electrical components, submit an emergency maintenance request and leave the system off.
Stop and submit a maintenance request if any of these apply:
Florida summer A/C outage is treated as an emergency under Sea Dog's response-time commitments. Call the tenant emergency line directly if it's hot in the home and the A/C is dead — don't wait to submit a portal request.
Florida air is so humid that your A/C strips gallons of water out of it every day. That water flows through a warm, dark PVC drain line — perfect conditions for algae and sludge growth. Pouring 1/4 cup of distilled white vinegar in the cleanout monthly during summer (May–October) keeps the line clear. This is the single most effective preventative habit a Florida tenant can adopt.
Cocoa Beach, Cape Canaveral, Merritt Island, and Melbourne Beach properties sit in salt-laden air that corrodes condenser coil fins, copper lines, and steel cabinets 2 to 3 times faster than inland systems. Sea Dog schedules coastal A/C inspections twice a year for that reason. Tenants at coastal properties can help by hose-rinsing the outdoor unit's exterior fins with low-pressure freshwater monthly — never spray inside the unit, only the outer fins.
Before a tropical storm or hurricane: move loose objects 10–20 feet from the outdoor unit, trim vegetation 3–5 feet from it, and turn the system off at the breaker if flooding is expected. Do not cover the unit long-term — it traps moisture. After a storm: visually inspect for debris, sand, or standing water inside the unit. If anything is inside the unit, do not turn it on. Submit a maintenance request first.
Under Florida Statute 83.51, once A/C is provided in a rental at lease start, the landlord must maintain it in good working order. A summer A/C outage isn't something Sea Dog or the property owner can ignore. Submit your maintenance request promptly and we'll respond fast — for a true outage in summer, we treat it as an emergency. If a written request goes unanswered for 7 days, Florida Statute 83.56 gives tenants specific remedies — see the legal disclaimer at the bottom of the page.
Change the air filter monthly during summer. From May through October, the 1st of every month — set a phone reminder. The rest of the year, every 1–2 months. Same size, same MERV rating. This single habit prevents the majority of A/C symptoms you'll ever encounter.
Don't block return-air or supply vents. No furniture, curtains, rugs, or boxes within 10 inches of any vent. Don't close registers in unused rooms — restricted airflow can freeze the coil.
Keep the thermostat consistent. ENERGY STAR suggests raising the setpoint 7°F when you're away from home and 4°F when sleeping. Don't crank the temp way down when you come home — A/Cs don't cool faster at lower setpoints, they just run longer.
Pour vinegar in the condensate drain line cleanout monthly during summer — only if Sea Dog has shown you where the cleanout is. 1/4 cup of distilled white vinegar, wait 30 minutes, flush with 2 cups of warm water.
Visually check the outdoor unit monthly. Clear leaves, palm fronds, and grass clippings from a 2–3 foot radius. Don't open the unit. Don't spray water into it. Coastal properties: add a low-pressure freshwater rinse of the exterior fins to your monthly routine.
Report symptoms early. A small drip becomes a flooded floor. A 15-minute short cycle becomes a dead compressor. Tell Sea Dog within 24 hours of noticing anything off — we'd much rather hear it early.
Sea Dog appreciates the heads-up. Reporting symptoms early is not a complaint — it's the single most effective way to keep your home comfortable and prevent expensive failures for the property owner.
A summer A/C outage in Florida is treated as an emergency. Submit a request through the tenant portal or call the tenant maintenance line — we dispatch a licensed Florida HVAC technician quickly.
If at any point you smell smoke, see flame, or there's electrical sparking — call 9-1-1 first. Then contact Sea Dog once everyone is safe.
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Self-help guides for tenants, by Sea Dog.
Sea Dog's guides are grounded in manufacturer documentation, federal energy and safety publications, and Florida law. For air-conditioner troubleshooting we draw on Carrier, Trane, Lennox, and Bryant manufacturer support documentation; the U.S. Department of Energy's air conditioner maintenance and common air conditioner problems guides; ENERGY STAR thermostat guidance; manufacturer Safety Data Sheets for R-22 and R-410A refrigerants; and Florida Statutes Chapter 83 — specifically F.S. 83.51 (landlord's obligation to maintain dwelling) and F.S. 83.56 (tenant remedies). Florida-specific drain-line, salt-air, and hurricane guidance synthesizes content from licensed Florida HVAC contractors.
This guide is educational and does not modify your lease. It is not professional HVAC advice. If a step does not resolve your issue, or if you have any safety concern, stop and submit a maintenance request through the tenant portal or contact Sea Dog at the tenant maintenance line. Specific equipment models may differ from the general guidance above — consult the manufacturer's owner's manual where uncertain. Under Florida Statute 83.51, the landlord must maintain air conditioning once provided at lease start. Under Florida Statute 83.56, if the landlord fails to maintain the dwelling after written notice, the tenant has specific statutory remedies. In any conflict between this guide and your signed lease or applicable Florida law (Florida Statutes Chapter 83), your lease and Florida law control. The Florida Bar's consumer pamphlet Rights and Duties of Tenants and Landlords provides a neutral overview.