Keep Your Home Cool Year-Round

Residential HVAC repair, installation, and maintenance serving Leesburg & The Villages FL

Your air conditioner runs harder in Eustis than in most other parts of the country. Between May and October, your system may cycle continuously just to keep indoor temperatures below eighty degrees. When airflow weakens, refrigerant levels drop, or your compressor begins short-cycling, St. Louis Air Conditioning sends licensed technicians to diagnose the problem and restore cooling performance throughout your home.

We provide AC repair, AC installation, system replacement, heat pumps, preventative maintenance, and emergency service for single-family homes, townhomes, and condos across Eustis and nearby communities. Our technicians diagnose airflow issues, refrigerant problems, and system inefficiencies common in Florida homes, working with both older housing stock and newer developments found throughout Lake County neighborhoods. Every cooling solution we design accounts for Central Florida's heat, humidity, and long summer seasons, prioritizing energy efficiency and long-term system performance.

Schedule residential HVAC service or request an estimate in Eustis today.

What happens when we visit your home

When you call for service in Eustis, a technician arrives with diagnostic tools to measure refrigerant pressure, airflow velocity, and temperature differentials at each supply vent. We check your condensate drain line for blockages, inspect electrical connections for corrosion, and verify that your thermostat communicates accurately with your indoor air handler.

After the repair or installation, you will notice cooler air at the registers, quieter operation from the outdoor unit, and more consistent temperatures between rooms. Your energy bills often decrease within the first billing cycle once your system no longer runs continuously to compensate for inefficiency.

We also test capacitors, clean coils, and tighten mechanical fasteners that loosen over time due to vibration. If your system requires replacement rather than repair, we perform load calculations to size the new equipment correctly for your square footage, insulation levels, and window exposure. Emergency residential HVAC service is available when your system fails unexpectedly during a heat wave or holiday weekend.

Woman in straw hat smiles, holding wine glass near a lake.

You probably have a question or two

Homeowners in Eustis often ask about repair costs, replacement timing, and what to do when their air conditioner stops cooling in the middle of summer.

Checkmark icon in a circle.
How do I know if I need repair or replacement?
If your system is less than ten years old and the repair costs less than half the price of a new unit, repair usually makes sense. Systems older than fifteen years with frequent breakdowns often cost less to replace than to repair repeatedly.
Check mark symbol inside a circle.
What causes my air conditioner to freeze up?
Low refrigerant levels, restricted airflow from a clogged filter, or a failing blower motor can all cause ice to form on your evaporator coil. Our technicians measure refrigerant charge with gauges and inspect your filter, ductwork, and blower assembly to identify the cause.
Black check mark inside a black circle.
How often should I schedule maintenance?
You should schedule maintenance twice a year in Florida, once before summer cooling season and once in late fall. Seasonal tune-ups catch minor issues before they turn into expensive repairs during peak usage months.
A black check mark inside a circle.
Why does my house feel humid even when the AC runs?
Your air conditioner removes humidity as a byproduct of cooling, but an oversized unit or a malfunctioning condensate drain can leave moisture in the air. We check your system's runtime, drain line function, and refrigerant levels to restore dehumidification.
Check mark inside a circle.
Do you work on heat pumps?
Yes, we repair and install heat pumps used for both heating and cooling in Eustis homes. Heat pumps operate efficiently in Florida's mild winters and provide year-round comfort when properly maintained.

St. Louis Air Conditioning works on systems installed in homes built decades ago and in new construction across Lake County, so our technicians understand the differences in ductwork design, insulation standards, and equipment placement. Request an estimate or schedule a service visit in Eustis today.