The repairs behind a warm house run from a median $310 to $3,000, and the first four causes cost nothing to check.
36-second explainer. What to check when the AC runs but the house stays warm, and what the repairs behind it cost.Stock footage via Pexels. Music: “SMILING FACES” by jean-yves allaire (Jamendo, CC BY-SA). All credits.Stock photo, not our work. Photo by Jakub Zerdzicki via Pexels.
Homeowner-reported prices related to AC not cooling
Middle half of reports Median
Diagnostic or service-call fee N = 62
$190$100–$290
Capacitor N = 26
$310$220–$400
Refrigerant recharge N = 48
$690$460–$1,200
Refrigerant leak repair N = 32
$1,320$800–$3,000
Compressor N = 43
$3,000$1,900–$4,000
Evaporator coil N = 57
$3,000$2,000–$4,500
Reported price, U.S. dollars
Source for every price on this page: HVACPro analysis of homeowner-reported quotes and invoices in public Reddit posts, 2025-01-01 to 2026-09-29. Repair figures are U.S.-wide; only rows marked Florida are Florida. The posts do not always say what a price included, and people who post are not a random sample. N is the number of quotes behind each figure.
Show the prices as a table
Homeowner-reported prices related to AC not cooling
There are two different problems under this one complaint, and telling them apart saves money. If the fan blows but the air is only lukewarm, the cooling side has an issue: airflow, refrigerant, a coil or a compressor. If nothing runs at all, it is a power or control issue and our page on an AC that will not turn on applies instead.
The cheap causes come first because they are common and free to rule out: a clogged filter, a thermostat set to the wrong mode or with dead batteries, an outdoor unit choked by debris and a tripped breaker. Our troubleshooter walks through each. Only when all four check out does a pro visit make sense, and that is where the diagnostic fee of $190 (62 reports) begins.
After the free checks, the cost ladder is steep. A capacitor is a median $310. Low refrigerant means a recharge at $690 or a leak repair at $1,320.
A compressor or evaporator coil each sit near $3,000. ENERGY STAR lists cleaning both coils and checking the refrigerant level as yearly technician tasks (ENERGY STAR checklist).
1Thermostat on this pageThe wall control. It tells the system when to run.
2Air filter on this pageCatches dust before the air reaches the blower and coil.
3Indoor unit: blower and evaporator coil on this pageThe blower moves the air; the cold coil cools it.
4Ducts and ventsCarry cooled air to the rooms and bring return air back.
5Condensate drain line, pan and float switchCarries off the water the coil pulls out of the air.
6Outdoor unit: compressor, fan and condenser coil on this pageMoves the heat from your house to the outdoors.
7Breaker panel and outdoor disconnect on this pageThe power feed to the system, and its local shut-off.
8Refrigerant linesTwo copper lines that link the indoor coil to the outdoor unit.
Simplified drawing, not to scale. Real systems vary: the indoor unit can sit in an attic or closet, the ducts can run in the attic or under the floor. Original illustration, not a photo.
Doing the math
Do the four free checks before paying anyone. If a pro is needed, ask for the failed part by name.
A quote for a recharge with no leak search is a bandage, because refrigerant does not get used up: a system low on it has a leak. A median recharge of $690 against a median leak repair of $1,320 shows what is being skipped.
4DIY troubleshooting guides for this job
820HVAC businesses with an active Florida license in the ring
Noneutility rebate programs listed for this job
Check these yourself first
Our page for this symptom ranks six causes, gives safe steps for the first four and marks the refrigerant and capacitor causes as hard-line, with no repair steps.
HVACPro is a free referral service for homeowners, not an HVAC company. We don't do the work, and we may be paid by the contractor. Check any contractor's license on the state's lookup before you hire.
Pick your city
Every city below has an A-to-Z list of the businesses with an active Florida HVAC license there. The number on each chip is that count.
No rebate pays for a diagnosis or a repair. If the answer is an old system past repair, the AC replacement page lists the Tampa Electric, Duke Energy Florida and Lakeland Electric programs on file.
Get a licensed pro
Need a licensed HVAC pro in the Tampa Bay outer ring? Call and we'll connect you with a licensed local contractor.
HVACPro is a free referral service for homeowners, not an HVAC company. We don't do the work, and we may be paid by the contractor. Check any contractor's license on the state's lookup before you hire.
No. Section 608 of the Clean Air Act bars venting refrigerant while servicing AC equipment (EPA Section 608), and technicians who service refrigerant equipment must be certified (EPA 608 certification). A system that needs refrigerant also has a leak.
Why is my AC running but not cooling?
Most often airflow or power to a component: a dirty filter, a blocked outdoor unit, a wrong thermostat mode, or a failed capacitor. Low refrigerant from a leak is the other big one. Check the first four yourself, then call a pro for the rest.
How much does it cost when an AC is not cooling?
It depends on the cause. Reported medians: diagnostic fee $190, capacitor $310, recharge $690, leak repair $1,320, compressor $3,000, evaporator coil $3,000.
Why is my AC freezing up?
A coil freezes when too little warm air crosses it or too little refrigerant is in it. A dirty filter or blocked vents is the free cause to rule out. If ice returns after that, the refrigerant or blower is the suspect, and both need a technician.
These questions come from the topic clusters below in our research on 2,095 mined questions (Refrigerant, capacitor, compressor, parts (DIY repair): 55; AC not cooling / blowing warm air: 54; Repair / service cost and quotes: 23; AC freezing up / iced coil: 31). The wording and answers are ours; we do not republish anyone's post.
$190
Diagnostic or service-call fee: median reported price, from 62 homeowner reports
HVACPro analysis of 62 homeowner-reported quotes and invoices in public Reddit posts, 2025-01-01 to 2026-09-29.