Learn
Understand Your AC
Before You Pay Anyone
Most air conditioner problems are one of a short list — warm air, water, ice, noise, or a dead system — and knowing which one you have changes what a fair fix costs. Below: troubleshooting by symptom, error codes by brand, Tampa Bay cost guides with named sources, and calculators that do the math for you.
Six sections, one rule: direct answers first
AC Problems & Symptoms
Start from what you can see and hear — warm air, water, ice, noise — and work back to the likely cause, what's safe to check yourself, and when to call a pro.
First up: Why your AC blows warm air · AC leaking water: what to check first · AC keeps freezing up.
Pages arriving — answers below alreadyAC Error Codes
Look up the exact code blinking on your thermostat or outdoor unit, by brand — what it means in plain English, and whether it's a reset or a service call.
First up: Trane error codes · Carrier error codes · Goodman error codes.
Pages arriving — answers below alreadyCost Guides
Real Florida price ranges for repairs and replacements, what drives them up or down — and a place to sanity-check a quote you've already received.
First up: AC replacement cost in Tampa Bay · AC repair cost by part · New AC unit cost by size.
Pages arriving — answers below alreadyTools & Calculators
Interactive calculators: what size AC your home needs, repair-or-replace math, and what a higher SEER2 rating actually saves on a Tampa Bay electric bill.
First up: AC size calculator · Repair or replace calculator · SEER2 savings calculator.
Pages arriving — answers below alreadyFlorida HVAC Guides
Longer reads for Florida homeowners: hurricane-season prep, humidity control, county permits, utility rebates and warranty fine print.
First up: Hurricane season HVAC prep · Florida humidity control · Permits by county.
Pages arriving — answers below alreadyBlog
The dated side of the knowledge base: field stories, seasonal notes and deep brand guides — starting with the full owner's guide to Carrier equipment in Tampa Bay, the 2025–2026 lineup and the R-454B refrigerant change.
Open the blog→AC troubleshooting in 60 seconds: start from the symptom
Before any phone call, run the checks for your symptom. They're free, they're safe, and they solve a real share of "broken AC" nights on their own.
Blowing warm air
The most common Florida complaint, and the one with the most free fixes. Work through these before anyone charges you a diagnostic fee.
- 1
Check the thermostat is on COOL and set 3–4 degrees below room temperature
A surprising share of "broken AC" calls end here — especially after a power blink resets the schedule.
- 2
Look at the breaker panel for a tripped AC breaker
Flip it fully OFF, then ON, once. If it trips again, stop — repeated resets can damage the compressor.
- 3
Pull the air filter and hold it up to a light
Can't see light through it? A clogged filter chokes airflow until the system cools nothing.
- 4
Walk outside and check whether the outdoor unit fan is spinning
Indoor fan running but outdoor unit silent usually points to a capacitor or contactor — a common, inexpensive repair.
Leaking water
Water around the indoor unit is almost always the condensate drain, not refrigerant — and in Florida the drain line clogs with algae faster than anywhere north of us.
- 1
Turn the system off at the thermostat first
Every hour it keeps running adds water to whatever is already soaking your ceiling or closet floor.
- 2
Check the drain pan under the air handler
A full pan with a clear drain means the float switch failed; a full pan with a slimy drain line means an algae clog.
- 3
Look for a white PVC pipe outside dripping near the slab
If it hasn't dripped in days during cooling season, the line is blocked upstream.
Ice on the pipes or unit
Ice means low airflow or low refrigerant. Either way, running it makes it worse — thaw first, diagnose second.
- 1
Switch cooling OFF but set the fan to ON
The fan thaws the coil in a couple of hours without the compressor fighting a block of ice.
- 2
Replace the filter while it thaws
A choked filter is the number-one cause of a frozen evaporator coil — and the only one you can fix yourself.
- 3
If it freezes again within a day or two, book a leak check
Recurring ice with a clean filter usually means a refrigerant leak, and topping off without fixing the leak just rents you a few cool weeks.
Strange noises
Noises are a language: each sound points at a different part. The trick is matching what you hear before it becomes what you pay.
- 1
Buzzing from the outdoor unit that won't start
Classic failing capacitor — cheap part, common Florida summer casualty.
- 2
Grinding or metal-on-metal
Shut it down. Motor bearings are finishing themselves off, and running it turns a motor swap into a bigger bill.
- 3
Rattling that changes when you press on the panel
Often just a loose panel screw or debris in the cabinet — the free kind of fix.
- 4
Squealing on startup
Blower belt or motor bearing on its way out; schedule it, but no need to panic tonight.
Completely dead
Nothing on the thermostat, no fan, no hum. Dead systems are usually electrical — and half the time it's not the AC itself.
- 1
Check the thermostat screen and its batteries
A blank battery-powered thermostat takes the whole system down with it.
- 2
Check both breakers — air handler and outdoor unit are often separate
One tripped breaker of the pair produces confusing half-alive behavior.
- 3
Find the float switch near the indoor unit
A tripped float switch cut the power on purpose to stop a water leak — see the leaking-water tab before resetting it.
What's coming to each section
The honest state of the knowledge base: these pages are researched and queued, published one at a time — never bulk-generated. If one of them would help you today, say so through the contact form and it moves up the list.
AC Problems & Symptoms
- Why your AC blows warm air
- AC leaking water: what to check first
- AC keeps freezing up
- Loud noises decoded: hum, buzz, grind, squeal
- Why your electric bill jumped
AC Error Codes
- Trane error codes
- Carrier error codes
- Goodman error codes
- Mitsubishi mini-split blink codes
- Rheem error codes
Cost Guides
- AC replacement cost in Tampa Bay
- AC repair cost by part
- New AC unit cost by size
- Second opinion on your quote
Tools & Calculators
- AC size calculator
- Repair or replace calculator
- SEER2 savings calculator
- Model number decoder
Florida HVAC Guides
- Hurricane season HVAC prep
- Florida humidity control
- Permits by county
- Utility rebates: TECO, Duke Energy
Already live
- Carrier AC in Tampa Bay: the owner's guide
- The 60-second symptom triage above — five symptoms, every check explained
- The size calculator below
What size AC does your home need?
A rough Florida estimate — the real answer comes from a load calculation.
Troubleshooting questions, answered straight
Can I troubleshoot my AC myself without breaking anything?
The safe list is short and genuinely safe: thermostat settings, batteries, air filter, breakers (one reset, not five), the float switch, and looking — not poking — at the outdoor unit. Everything past that involves 240 volts, sealed refrigerant circuits and warranty fine print. The checks on this page stop exactly where the risk starts.
Why does an AC company publish free troubleshooting guides?
Because an informed customer is cheaper to serve and harder to overcharge. If a $10 filter or a tripped breaker fixes your AC tonight, you didn't need a truck — and when you do need one, you'll already know what a fair diagnosis and a fair price look like. That's the whole bet behind this knowledge base.
When should I stop troubleshooting and call a professional?
Three hard stops: a breaker that trips more than once (electrical fault), ice that comes back after a filter change (likely refrigerant leak), and any burning smell (shut the system down at the breaker). Each of those gets worse — and more expensive — with every hour of runtime.
Which AC error code pages do you cover?
The error-codes section is being built brand by brand: Trane, Carrier, Goodman, Mitsubishi mini-split blink codes and Rheem are first in line, because that's what sits on Tampa Bay slabs most often. Until those pages are live, the practical rule covers most codes: one reset (power off at the breaker for five minutes) is fair; a code that returns after a reset is a service call, not a retry.
What will this section look like when finished?
Five sub-sections, each with its own pages: AC problems by symptom, error codes by brand, cost guides with sourced Tampa Bay market prices, interactive calculators, and longer Florida guides — hurricane prep, humidity, permits, rebates. Every page ships with the same rule: a direct answer first, details after, no fluff.
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