Troubleshooting Guide
AC Running Constantly in Tampa?
AC running non-stop in Tampa heat is usually normal (humidity demands long cycles). But if it literally NEVER turns off and the house still feels warm, something is wrong. 4 most common causes below.
Quick Answer
AC running constantly in Tampa = 4 causes: (1) thermostat set too low (under 72°F is unrealistic for Tampa heat), (2) refrigerant leak (AC can’t reach setpoint), (3) dirty coils/filter restricting airflow, or (4) undersized AC for your home. Fix: thermostat $0, filter $89, coil clean $279, refrigerant $399-$599. Call (813) 343-2212.
4 Reasons AC Never Stops
Thermostat Too Low
Symptom: Set to 68-70°F, unrealistic in Tampa summer; AC runs continuously trying.
Raise setpoint to 74-78°F (DOE recommended 78°F for energy efficiency).
Low Refrigerant
Symptom: AC runs but can’t reach setpoint, bills climbing.
Leak detection + repair $399-$599 + recharge $95/lb.
Dirty Coils/Filter
Symptom: Visible dirt on filter or outdoor coil.
Filter $89, professional coil cleaning $279.
Undersized AC
Symptom: AC has always struggled to cool, worse in Aug/Sept.
Proper load calculation ($0 with free in-home quote). Upsize unit: $6,643-$15,406 full replace.
What to Do Right Now
- Check thermostat setting, raise to 74-78°F.
- Replace air filter if dirty.
- Clean outdoor coil (garden hose, top down).
- If still running constantly, call for diagnostic.
Thermostat adjustment: $0. Filter: $89. Coil clean: $279. Refrigerant fix: $399-$699. AC upsize: $6,643-$15,406.
FAQ
Is running all day normal in Tampa?
Largely yes, Tampa humidity + heat means AC works hard. “Long cycles” = good for humidity control. “Never stops” + doesn’t cool = bad.
What's the ideal Tampa thermostat setting?
DOE recommends 78°F. For Tampa comfort: 74-76°F is realistic. Lower than 72°F in summer = unrealistic demand.
Will always-running AC wear it out faster?
Yes. Tampa ACs log 2-3x the runtime of northern systems. Annual maintenance ($249+) significantly extends life.
Can low Freon cause this?
Yes, AC can’t cool efficiently, runs continuously trying to reach setpoint but never does. Also freezes the coil.
Is my AC too small?
Possibly. A 1,500 sq ft Tampa home needs ~3 tons. If yours is 2.5 tons or smaller, undersized. Manual J calc confirms.
Need Help With a constantly-running AC?
Same-day Tampa Bay service. FREE diagnosis on every call. (813) 343-2212.