“My highest recommendations for Devon and the Maritime Air team — thorough, honest, and on time. They explained everything in plain language and didn't push any unnecessary upsells.”
Spencer Fuller
May 2026
AC Emergency · Treasure Coast
AC Blowing Warm or Hot Air? Here's the Fix.
When your vents blow room-temperature or warm air, the outdoor unit isn't running — or refrigerant isn't moving. We diagnose and repair same-day across Fort Pierce, Port St. Lucie, Stuart, and Vero Beach.
Why Treasure Coast Trusts Us
Reasons Homeowners & Captains Pick Maritime Air Co.
5-Star Rated
Verified Google reviews
Licensed & Insured
Class-A CAC1824400
Family Owned & Operated
Treasure Coast residents
Residential · Commercial · Marine
Full-spectrum HVAC
Written Estimates
Approved before work begins
Photo-Documented Work
Warranties registered for you
Chamber of Commerce
St. Lucie County member
Outdoor unit not running
If the indoor blower runs but the outdoor condenser is silent, the compressor isn't compressing — and warm room air just gets recirculated. Causes: tripped breaker, pulled disconnect, failed contactor, failed capacitor, or a thermostat call that isn't reaching the outdoor unit.
- Check breakers in the main panel
- Check the outdoor disconnect (gray pull-box at the condenser)
- Listen for a hum at the condenser — humming + no start = capacitor
Lost all refrigerant
A fresh leak (line-set rupture, compressor seal failure, evaporator coil split) drops refrigerant charge below the low-pressure switch cut-out. The compressor cycles off for safety, and you get warm air. We pressure-test, locate the leak, repair, and recharge — never recharge without finding the leak.
Thermostat in HEAT or EM HEAT
Easy one to miss — kids, pets, cleaning crew, or a stuck button can flip the thermostat. Verify COOL mode and that the setpoint is at least 3°F below current room temperature.
Reversing valve stuck (heat pumps)
Heat pump systems use a reversing valve to switch between heating and cooling. A stuck valve sends hot refrigerant to the indoor coil even in COOL mode. We diagnose with refrigerant pressure readings and replace the valve when needed.
Frozen indoor coil thawing
If the system was running with a frozen evaporator coil, switching off may produce warm air until the coil thaws. Run FAN ONLY for 2 hours, then call us — frozen coils always indicate a deeper problem (low charge, dirty filter, blower issue).
Reviews
What Treasure Coast Customers Say
5.0
37 Google Reviews
Google
“Devon has provided thorough maintenance and excellent service. Truly family-owned care — they treat your home like it's their own. Highly recommend for Treasure Coast homeowners.”
Oh Canada
March 2026
“Working with Devon on my HVAC system was a great experience from start to finish. Fair, clean install, and the system has been running perfectly through Florida summer heat.”
David Alker
February 2026
Our Work
View all projects Example HVAC Scenarios
Real installs and repairs we've completed across the Treasure Coast.
Coil Cleaning
Evaporator Coil Pull & Deep Clean — Port St. Lucie
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Trane Installation
Trane XV20i Installation — Fort Pierce
Fort Pierce, FL · Trane XV20i + TAM9
Trane Installation
Trane XR16 + Heat Pump Installation — Port St. Lucie
Port St. Lucie, FL · Trane XR16
FAQ
Common Questions
Why is my AC blowing warm air all of a sudden?+
Sudden warm-air symptoms almost always trace to one of four things: a tripped outdoor disconnect, a failed contactor (outdoor unit not running), lost refrigerant from a fresh leak, or the thermostat accidentally switched to HEAT or EM HEAT.
Is my AC blowing warm air an emergency?+
In Florida summer with indoor temps climbing above 82°F, yes — especially for infants, elderly, or pets at home. We dispatch same-day with stocked trucks. Captain's Comfort Club members never pay overtime for after-hours calls.
Can I check anything before calling?+
Verify thermostat is set to COOL and target temp is below current room temp. Check the outdoor disconnect (pull box at the condenser) is fully inserted. Check breakers in the panel. Replace the air filter if it's dirty. If warm air continues, call us.
Stop the warm air. Call (772) 236-4277.
Call (772) 236-4277 or schedule online. Class-A licensed across the Treasure Coast.