HVAC Repair in St. Augustine, FL
Homes here need heat from December through February and cooling from April through October. If your system quits, tell us what it's doing and a licensed contractor who covers St. Johns County will get in touch.
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Ten months of work a year in St. Johns County
Your air conditioner runs April through October here, pushing through summer afternoons that average 90°F. That is the long stretch. The compressor and the coils carry that load for seven months straight, and a system that never gets a real break wears faster than one that runs a few weeks and rests.
Winter is short here, just December through February, but the nights still average 48°F, cold enough that the heat has to answer. Most homes here heat with electricity, so that means a heat pump or electric furnace cycling on through those cool nights. Then there is the wind. St. Johns County has seen 127 damaging wind events over the last ten years, and outages follow storms like that. Statewide, close to four in ten households lost power for a full day or more in 2024. A system that loses power and does not come back on its own, or a thermostat that loses its settings, leaves you checking the breaker before you find out what actually failed.
- 3 months
- December through February, your system heats
- 7 months
- April through October, it cools
- 48°F
- the average winter night it heats against
- 90°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
Florida requires HVAC contractors to hold a state license.
The license comes from the Construction Industry Licensing Board. It belongs to the contractor, not to any single job they take on.
Because the license covers the contractor rather than the job, the same license that qualifies them for a new install is what backs a repair on your heating and cooling system too. There is no separate license for this one job. It is the contractor's license or nothing.
Sources: Florida Legislature · Florida Department of Business and Professional Regulation
- Why is my heat not working?
- Most of the time it comes down to power, fuel, or a thermostat setting that got bumped. With most homes here heating with electricity, check the breaker panel first, since a tripped breaker will cut power to the whole system. Check that the thermostat is set to heat and set a few degrees above room temperature. If the breaker is fine and the thermostat looks right, something inside the unit needs a contractor's attention, especially with lows averaging 48°F overnight this time of year.
- Why is my system running but not cooling the house?
- If air is moving but it is not cold, check the air filter first. A filter clogged with dust chokes off airflow across the coil, and when that happens the coil can freeze up and stop cooling altogether even though the blower keeps running. Check the outdoor unit too, since leaves or grass clippings packed against it block airflow the same way. If the filter is clean and the outdoor unit is clear, the system likely has a refrigerant or mechanical issue that needs a contractor to diagnose, and that matters here with afternoons running near 90°F most of the summer.
- What can I check before calling for HVAC repair?
- Start with the thermostat. Make sure it is set to the right mode, heat or cool, and that the set temperature is actually calling for the system to run. Check the breaker panel for anything tripped, and check the air filter, since a dirty filter causes problems in both summer and winter. If the outdoor unit is involved, look for debris blocking it. Anything beyond that, a licensed contractor needs to look at it. Florida requires HVAC contractors to hold a state license through the Construction Industry Licensing Board, so ask for that license number before work starts.