Skip to main content
★★★★★ 4.8 · 1,300+ reviews
Lic. CAC1819196 · CFC1431159
✓ FREE Estimates   |   ✓ FREE Diagnosis
No diagnostic fee. No trip charge. You only pay if you approve the repair. Call (813) 343-2212

Troubleshooting Guide

Why Is My AC Not Cooling? 7 Tampa-Specific Causes

AC running but house not getting cold? In Tampa Bay’s 90+ degree summers this goes from annoyance to emergency fast. Below are the 7 most common causes we see on service calls, which ones you can check yourself in 5 minutes, and when to bring in a licensed tech. Home Therapist: CAC1819196, FREE estimates + FREE diagnosis. Flat-rate pricing on every approved repair.

Call Now: (813) 343-2212
Book Free Estimate

Quick Answer

If your AC is running but not cooling in Tampa, it’s almost always one of 7 things: a clogged air filter, wrong thermostat setting, tripped outside-unit breaker, frozen evaporator coil, low refrigerant from a leak, dirty condenser coils, or a failing compressor. DIY checks take 5 minutes. Most real repairs run $279-$849 (capacitor, contactor, motor) and major repairs (compressor, coil replacement) run $649-$1,900. Our diagnosis is FREE, no diagnostic fee, ever. Flat-rate pricing on every approved repair. Call (813) 343-2212 for same-day Tampa Bay service.

7 Common Causes, Ranked

1. Clogged Air Filter

DIY possible

Symptom: Weak airflow at vents, air blows cool but not cold, unit runs constantly.

Likelihood in Tampa: Extremely common (30% of no-cool calls). Tampa humidity clogs filters fast.

Pull the filter and check light through it. If you can’t see light, replace it. Use MERV 8-11 for best airflow/filtration balance. Should be replaced every 30-60 days in Tampa.

2. Thermostat Set Wrong

DIY possible

Symptom: Fan runs constantly but AC isn’t cycling, or mode set to “heat” or “off.”

Likelihood in Tampa: Common after a power outage or kids/guests messing with it.

Set mode to COOL, fan to AUTO (not ON), and temperature 3-5° below current room temp. Wait 10 min. If no cold air, move on to the next cause.

3. Outside Unit Breaker Tripped

DIY possible

Symptom: Inside fan blows air but outside condenser unit isn’t spinning. Only room-temp air comes out.

Likelihood in Tampa: Common after Tampa thunderstorms (power surges trip breakers).

Check your electrical panel for a tripped 30-50 amp AC breaker (will be labeled). Reset firmly. Also check the disconnect box near the outside unit. If it trips again immediately, stop and call a tech.

4. Frozen Evaporator Coil

Call a tech

Symptom: Ice visible on copper lines at outside unit, water dripping from air handler, no cold air.

Likelihood in Tampa: Common in Tampa after a filter clog or refrigerant issue. Humidity speeds it up.

Turn AC OFF completely and run fan only for 2-3 hours to let ice melt. Do not run AC while frozen, you’ll burn out the compressor. Once thawed, if it freezes again, call a tech. Refrigerant leak is likely.

5. Low Refrigerant (Leak)

Call a tech

Symptom: Runs constantly, cold air but not cold enough, bills spiking, ice forming, hissing sound near unit.

Likelihood in Tampa: Common in Tampa homes 8+ years old. Coil corrosion + salt air accelerates leaks.

Licensed tech required. We inject UV dye ($449), find the leak, seal or replace the component, then recharge ($95/lb for R-410A). Most leak repairs run $399-$599 total.

6. Dirty Condenser Coils

DIY possible

Symptom: Outside unit visibly covered in grass, leaves, cottonwood fluff, or pet hair. Unit struggling on hot days.

Likelihood in Tampa: Very common. Tampa yards + oak pollen = clogged outdoor coils.

Gently rinse the outside unit with a garden hose (top down, not pressure washer). If still poor cooling, professional coil cleaning runs $279.

7. Failing Compressor

Call a tech

Symptom: Outside unit humming loudly but not spinning, or clicking/buzzing. May trip breaker. No cold air at all.

Likelihood in Tampa: Less common but terminal if true. Usually on 12+ year old Tampa systems.

Compressor replacement ($649-$1,900+) often costs 40-60% of a new system. We’ll give you a straight repair-vs-replace recommendation at the diagnosis.

What to Do Right Now

  1. Go through causes 1-3 yourself (filter, thermostat, breaker). Takes 5 minutes total.
  2. If AC is frozen, turn it off immediately and set fan to ON for 2-3 hours.
  3. Check the outside unit, if coils look dirty or unit isn’t spinning, move to step 4.
  4. Call Home Therapist at (813) 343-2212. Same-day service across Tampa, Brandon, Clearwater, St. Pete, and every city we cover.

What Does This Fix Cost in Tampa?

FREE diagnosis and estimate. $279 applies only if you approve the repair, no separate trip charge. Most Tampa AC no-cool repairs fall into: simple fixes ($279-$349: capacitor, contactor, relay, drain flush), mid-level ($399-$849: motor replacement, refrigerant leak repair), or major ($649-$1,900: compressor, coil, copper line replacement). See full breakdown on our AC repair pricing page.

Frequently Asked Questions

Why is my AC blowing warm air?

In Tampa, warm air from a running AC usually means one of: outside unit not running (tripped breaker), low refrigerant, frozen coil, or a dirty filter choking airflow. Start with the thermostat and filter, then check the outside unit. If none of those work, call us.

How long can I run my AC with a bad capacitor?

Don’t. A failing capacitor strains the compressor, and Tampa compressor replacements run $649-$1,900+. A capacitor replacement is $279. Get it fixed when symptoms start (AC slow to start, humming, not cooling well).

Will a dirty filter really stop my AC from cooling?

Yes. A clogged filter restricts airflow, which can freeze the evaporator coil and completely stop cooling. In Tampa humidity this happens faster than other climates. Check your filter monthly.

How much does refrigerant cost in Tampa?

R-410A refrigerant is about $95 per pound in our pricebook. Most Tampa homes need 2-4 pounds for a recharge after leak repair. Note: R-410A is being phased out, new systems use R-454B. If your system is from before 2025, you’re still on R-410A.

Why is my AC running but not cooling my upstairs?

Almost always a ductwork or zoning issue. Tampa homes with bonus rooms or upstairs additions often have undersized return air ducts. Fixes range from duct sealing ($279) to adding a Honeywell or Daikin zone system ($2,599-$4,999).

Is it the thermostat or the AC?

Quick test: set thermostat 3° below room temp and wait. If outdoor unit doesn’t kick on within 2 minutes and breaker is fine, it’s likely the thermostat (bad wiring or failing unit) or a control board issue. Thermostat replacements run $349-$899 depending on model.

Can I fix a frozen AC myself?

You can melt the ice (turn AC off, run fan 2-3 hrs), but if it freezes again, there’s an underlying cause (dirty filter, dirty coils, low refrigerant, or failing blower) that needs a tech.

How fast can Home Therapist get to my AC?

Same-day service across Tampa, St. Petersburg, Clearwater, Brandon, Riverview, Wesley Chapel, and every city in Tampa Bay. We dispatch live, not through an answering service. (813) 343-2212.

When should I replace instead of repair?

If repair is more than 50% of replacement cost AND your system is 12+ years old, replace. A new Goodman Value system runs $6,643-$10,688 installed; Premium $8,397-$12,947; Daikin Elite $9,454-$15,406.

Do you give free AC diagnosis?

Our $279 flat-rate repair INCLUDES the full diagnosis and up to the first hour of work. We don’t do ‘free diagnosis then $500 for the repair’ bait-and-switch. You know the price before we start.

Related Problems

AC Not Cooling? Call Now.

Same-day Tampa Bay service. Licensed CAC1819196. transparent pricing includes diagnosis. No surprise fees.

(813) 343-2212
★★★★★★ 4.8 (1,337 verified reviews)
Verified4.8★ · 1,337 reviews
🛡 FL Licensed: CAC1819196 · CFC1431159💼 $1M General Liability + Workers’ Comp🏠 Family-owned since 2017⚡ Same-day service
★★★★★Plumbing

They are very professional, punctual, and organized. Adarberto is a great plumber. His experience and knowledge left us with a lot of confidence and peace of mind. We will definitely call them…

Orlienski Perez · · Google
★★★★★

A very friendly and very professional company. They get the job done right and efficiently! And their rates are reasonable. Highly recommend!

Emi Plays · · Google
★★★★★

AC therapist are the best in this area. They explain everything that they find and what they recommend

Roberto Hernandez · · Google
★★★★★

On time service every few months.. they call ahead to schedule.. they confirm appointments before appointment date and also advise day of when they are on the way!! Great customer service!! Thank…

Linda Silva · · Google
★★★★★

They have a quick response time and are easy to communicate with. The service was done well, and Alejandro was very friendly and professional.

Sylvia Hernandez · · Google
★★★★★Plumbing

I had a great experience with Alejandro from Home Therapist Cooling, Heating, and Plumbing. He repaired two toilets and installed the water line to my new refrigerator after the delivery team refused…

Thomas Jones · · Google
★★★★★AC repair

Amazing service from start to finish. My AC system completely stopped working, and they were able to come out the same day, which was a huge relief. The technician was professional, knowledgeable,…

Manny Velasquez · · Google
★★★★★Water heater

As an engineer/fabricator/assembler, I have high standards from my contractors. This guy Sam, he fulfilled all my requests and installation needs. He took pride of his work, and left me with a…

ALEXANDROS ORESTIS · · Google
★★★★★Plumbing

A big THANK YOU to Home Therapist Cooling, Heating and Plumbing for running sewer pipes to our RV and shed! Samuel was beyond amazing! He was prompt, professional, and his communication style…

Mindy Walker · · Google
Latest review: May 2026 · auto-refreshed daily
Call (813) 343-2212 Read all 866 on Google
Reviewed by Richard MoralesCo-Owner & FL Class B Air Conditioning Contractor, Home Therapist

Richard co-owns Home Therapist Cooling, Heating, and Plumbing and holds the FL Class B Air Conditioning Contractor license (CAC1819196) since 2017. The company holds licenses CAC1819196 (FL Class B AC Contractor, Richard Morales) and CFC1431159 (FL Plumbing Contractor, Alex Morales), serving the Tampa Bay metro with a six-technician field team and 1,378+ verified five-star reviews.

Published: Last reviewed: