Troubleshooting
AC Cools Downstairs Not Upstairs
Classic Tampa two-story problem — cold downstairs, hot bonus room or upstairs bedrooms. Usually ductwork or zoning, not the AC itself. FREE in-home evaluation. CAC1819196.
Quick Answer
Uneven cooling (upstairs hot, downstairs cold) in Tampa = 4 causes: (1) undersized return air ducts upstairs, (2) hot Tampa attic cooks ductwork running through it, (3) no zoning (one thermostat for whole house), or (4) closed/restricted supply vents. Fixes: duct repair $79+, zone system $2,599, insulation wrap $99/ft, or mini-split for bonus room $3,826+. Call (813) 343-2212.
4 Reasons Upstairs Stays Hot
Undersized Return Ducts (Most Common)
Symptom: Upstairs never reaches set temp. Airflow weak at upstairs vents.
Add return air path upstairs: $799-$1,999 depending on routing.
Hot Attic Heats Ducts
Symptom: Tampa attic reaches 140°F+ in summer. Uninsulated ducts lose cooling.
Insulation wrap $99/ft. R8 antimicrobial duct replacement $799/section.
No Zoning
Symptom: One thermostat controls whole house; works for avg temp but extremes suffer.
Honeywell zone system $2,599. Daikin Fit zone $4,999.
Closed Supply Vents
Symptom: Upstairs vents closed to “save energy” — actually increases pressure + reduces total airflow.
Open ALL vents. If still uneven, call. DIY check first.
What to Do Right Now
- Walk through every room — feel airflow at each vent.
- Open ALL supply vents (no closed vents).
- Check for obvious duct damage in attic (if safe).
- Call for FREE evaluation + quote.
FREE evaluation. Quick fixes (vent opening) $0. Duct repair $79+. Zone system $2,599-$4,999. Mini-split for problem room $3,826+. See pricing.
FAQ
Why do builders make undersized ductwork?
Cost-cutting in Tampa tract homes. Return ducts especially often undersized. Common in bonus rooms + upstairs additions.
Will a bigger AC fix it?
Usually no — makes it WORSE by short-cycling (worse humidity, still uneven). Fix ductwork first, then evaluate AC size.
Mini-split for the bonus room?
Often the smartest fix for Tampa bonus rooms. $3,826-$8,228 single zone. Dedicated cooling for problem room.
Zone system vs mini-split?
Zone: one AC, dampered ducts to different zones. Mini-split: separate system for specific room. Zone better for whole-home; mini-split better for one problem room.
How long to fix?
Duct repair: 1 day. Zone install: 1-2 days. Mini-split: 1 day. FREE quote in-home.