Commercial AC Repair on the Treasure Coast: What to Do When Your Business Loses Cooling
The short answer: When a commercial AC system stops cooling, check the thermostat settings and schedule, the breakers, and the filters, then call a licensed commercial HVAC contractor with the unit’s make, model and what you observed. Do not reset a tripping breaker more than once or open the equipment. A good contractor will diagnose the cause on site, give you a written repair option, and keep you cooled while parts are on order. Sharkey Air runs a 24/7 line at (772) 220-2487 and provides temporary portable cooling when a system cannot be fixed on the spot.
Key takeaways
- Most commercial no-cool calls trace back to a short list: failed capacitors or contactors, clogged filters and coils, condensate safety switches, refrigerant leaks, and control problems.
- A few minutes of safe checks can save a service call. Anything beyond that belongs to a licensed tech.
- Write down what you saw and heard. It speeds up diagnosis.
- Ask for temporary cooling if the repair waits on parts.
- November is a quieter month on the Treasure Coast. Fix the weak unit now instead of in July.
Step 1: Do the safe checks (5 minutes)
- Thermostat or controls. Confirm it is set to cool, the setpoint is below room temperature, and an occupancy schedule did not switch the building to unoccupied mode. Check for a dead battery or a blank screen.
- Breakers and disconnects. Look for a tripped breaker on the HVAC circuit. Reset it once. If it trips again, leave it off and call. A repeat trip means something is wrong.
- Filters. A badly loaded filter can freeze the coil and stop airflow. If you have access and the right size, swap it.
- Water. Water in a drain pan or a dripping ceiling tile near an air handler often means the condensate line is clogged and a float switch shut the system off to prevent an overflow. Note it for the tech.
Do not open electrical panels on the unit, add refrigerant, or climb onto the roof without proper access and fall protection. Federal rules require EPA Section 608 certification for anyone who services equipment that contains refrigerant.
Step 2: Call with the right details
When you call, have this ready:
- Business name, address, and the best on-site contact
- Which unit (rooftop number, suite, or location) and the make and model if you can see the data plate
- What is happening: blowing warm air, not running at all, running but short cycling, leaking, iced over, odd noises or smells
- When it started and anything that happened before (storm, power outage, recent work)
- Whether you have a service agreement
Calls with this information get triaged faster and the tech arrives with the right parts on the truck more often.
Step 3: What a proper diagnosis looks like
A commercial tech should check electrical components (capacitors, contactors, motors, compressor), refrigerant pressures and temperatures, airflow, coils, belts on larger units, condensate drainage, and controls. You should get a clear explanation of what failed, why, and what it costs to fix. For an overview of the equipment types we see on the Treasure Coast, see types of HVAC systems for commercial buildings.
Common causes we find on Treasure Coast commercial roofs:
| Symptom | Common cause |
|---|---|
| Unit hums but compressor or fan will not start | Failed capacitor or contactor |
| Warm air, ice on lines | Low airflow (dirty filter or coil) or low refrigerant |
| Unit off, water in pan | Clogged condensate drain tripped the float switch |
| Short cycling | Oversized equipment, control fault, or refrigerant issue |
| Repeated breaker trips | Electrical fault or failing compressor |
| Corroded, flaking coil fins | Salt air exposure, end-of-life coil |
Step 4: Keep the business running while you wait
If the repair needs parts, ask about interim cooling. Sharkey Air’s Temporary Cooling Guarantee: if we cannot fix your system on the spot, we bring a portable AC unit until the full repair is done.
Other steps that help: – Shift heat-producing work, ovens or equipment to cooler hours. – Keep blinds closed on the sunny side and doors shut. – Protect people first. OSHA’s heat guidance (water, rest, and breaks in cool areas) applies to indoor work too. – Protect inventory and electronics. Server closets and pharmacy or food storage need priority.
Step 5: Repair or replace?
A single repair on a younger system is usually the right call. Replacement makes more sense when the unit is 15 or more years old, the compressor has failed, it uses R-22, or the repair approaches half the value of a new unit. For businesses planning a replacement this year, a system installed and running by December 31 may qualify for a Section 179 deduction. More detail in repair or replace your commercial air conditioner.
How to make the next breakdown less likely
Most emergency calls we take could have been caught on a maintenance visit: a weak capacitor, a slow drain, a coil packed with debris. A commercial maintenance plan puts your equipment on a schedule and puts you at the front of the line when something fails. Our preventive maintenance guide explains what is included.
Frequently asked questions
How fast can a commercial AC repair company respond? It depends on the time of year and your service agreement. Sharkey Air runs a 24/7 service line and in most cases provides same-day or next-day service.
How much does commercial AC repair cost? It ranges widely by part and equipment size, from a minor electrical part to a compressor replacement. Ask for a written price before work begins.
Should I keep resetting the breaker? No. Reset it once. If it trips again, leave it off and call a technician. Repeated resets can damage the compressor.
Why is my rooftop unit running but blowing warm air? The most common causes are a failed compressor component, low refrigerant, a frozen coil from restricted airflow, or a control fault. A technician needs to measure pressures and temperatures to know which.
Do you work on all brands? Yes. Sharkey Air services all major brands of commercial air conditioners, heat pumps, ductless systems and air handlers.
Need cooling back today?
Sharkey Air has kept Treasure Coast businesses running for decades, with commercial service across Martin, St. Lucie and Palm Beach counties. Call our 24/7 line at (772) 220-2487 or request commercial service.
Sources – U.S. EPA, Section 608 Technician Certification Q&A (certification required to service and install stationary equipment): https://www.epa.gov/node/204911 – OSHA, Water. Rest. Shade. trade release: https://www.osha.gov/news/newsreleases/osha-trade-release/20200630