Your air conditioner is running. You can hear it. Air is coming out of the vents. But the house is not getting any cooler, and the thermostat is stuck three degrees above where you set it.
Before you book a service call, work through this list. Three of these seven you can fix yourself in under ten minutes, and we would rather you save the money than pay us to flip a breaker.
The other four mean it is time to call someone.
1. Check your air filter
Start here. A filter choked with dust restricts airflow across the evaporator coil. Less airflow means less heat removed from your air, and in bad cases the coil drops below freezing and ices over — at which point the system stops cooling altogether.
Pull the filter out and hold it up to a light. If you cannot see light through it, that is your problem.
In Boca Raton, with systems running most of the year, filters need changing every 30 to 60 days. Most people stretch it to three or four months and then wonder why the house will not cool.
Fix it yourself: yes. A new filter costs a few dollars.
2. Look for ice on the refrigerant line
Go to your indoor air handler and find the larger of the two copper lines — the insulated one. Is there frost or ice on it?
If so, shut the system off at the thermostat but leave the fan running. That will thaw the coil over the next few hours. Once it has thawed, replace the filter and restart it.
If it ices over again within a day, the cause is deeper — usually low refrigerant or a failing blower — and you need a technician.
Fix it yourself: partly. Thawing it is easy. Stopping it from recurring usually is not.
3. Check the outdoor unit is actually running
Walk outside to the condenser. Is the fan on top spinning? Can you hear the compressor?
If the unit is completely silent, check your breaker panel. If you hear a hum but the fan is not turning, that is a classic failed capacitor — a small, inexpensive part that takes a technician about twenty minutes to swap.
Do not try to spin the fan with a stick. There is stored electrical charge in that unit even with the power off, and it can be dangerous.
Fix it yourself: only the breaker.
4. Clear the area around your condenser
Boca Raton landscaping has a way of swallowing outdoor units. Hedges grow in, mulch piles up, and leaves collect against the coil.
Your condenser gets rid of heat by pulling air across its fins. Block that airflow and the system cannot dump heat, which means it cannot cool your house no matter how long it runs.
Clear two feet on all sides. While you are there, gently rinse the coil fins with a garden hose from the outside in — no pressure washer, the fins bend easily.
If you are close to the water, do this more often. Salt air corrodes coils, and east Boca units take more of a beating than most.
Fix it yourself: yes.
5. Check your thermostat settings
Worth ruling out. Make sure it is set to COOL, not FAN. Make sure the fan is on AUTO, not ON — with the fan set to ON it blows continuously, including when the system is not actively cooling, which feels exactly like warm air coming from the vents.
If the display is blank or dim, replace the batteries.
Fix it yourself: yes.
6. Look for water around the air handler
Water pooling near the indoor unit, or a system that shuts itself off at random, usually points to a clogged condensate drain line.
Humidity here means your AC pulls gallons of water out of the air daily. That water leaves through a drain line that slowly fills with algae. When it blocks, a safety switch kills the system to stop water damaging your ceiling.
This is the most common service call we get in South Florida, and it is almost entirely preventable with annual maintenance.
Fix it yourself: a shop vac on the outdoor end of the drain line sometimes clears it. If that does not work, or if water has already reached your ceiling, call.
7. Consider the age of the system
If your AC is 12 to 15 years old and struggling through its second or third summer of poor cooling, the issue may not be any single failed part. Compressors lose capacity. Coils corrode. Efficiency drops.
Florida systems work harder than almost anywhere in the country — close to year-round operation, constant humidity, salt air near the coast. A unit that might last 20 years in a milder climate often gives you 10 to 12 here.
We walk through the full math in our repair or replace guide.
When to stop and call someone
Call a technician if any of these apply:
- The coil ices over again after thawing
- The outdoor unit hums but the fan will not turn
- You can hear grinding, screeching, or loud clicking
- There is a burning smell from any vent
- The breaker trips repeatedly
- Water has reached your ceiling or wall
- You have worked through this list and nothing changed
One thing worth saying plainly: do not buy a DIY refrigerant recharge kit. Refrigerant is not consumed by normal operation. If your level is low, you have a leak. Adding more without fixing the leak wastes your money, and overcharging a system can destroy the compressor — turning a moderate repair into a full replacement.
Same-day service in Boca Raton
Boca Raton is a short drive from our base in Boynton Beach, so we can usually be there the same day — often within a few hours.
[ADD A REAL BOCA RATON JOB HERE — neighborhood, what was wrong, how quickly you arrived, what it cost. Two or three sentences. This is what makes the page genuinely local instead of a template with a city name dropped in.]
You get Jared himself, a clear explanation of what actually failed, and a price before any work starts. No commission, no upselling.
Still not cooling? Call (561) 318-1882 or book a visit online.
See our full AC repair services, or find out what repairs typically cost in this area. Most of the problems on this list are prevented entirely by a yearly AC maintenance visit.