AC Not Cooling in West Palm Beach or Loxahatchee?
If your air conditioner is running but the house still feels warm, Koolray Heating and Air can help diagnose the issue fast. An AC that is not cooling may be caused by low refrigerant, a dirty coil, weak airflow, a clogged drain, thermostat problems, electrical issues, or a failing outdoor unit.
We help homeowners across West Palm Beach, Loxahatchee, Wellington, Royal Palm Beach, and Westlake get their cooling systems working again with honest service, clear communication, and reliable AC repair.
What to Check Before Calling for AC Repair
Some cooling issues are simple, while others need a licensed HVAC technician. Before scheduling service, you can safely check a few things that often cause an AC to stop cooling properly.
Check the Thermostat
Make sure the thermostat is set to cool, the temperature is lower than the indoor temperature, and the fan is set to auto. If the screen is blank or not responding, visit our thermostat not working page for more help.
Check the Air Filter
A clogged filter can reduce airflow and cause the AC to run without cooling the house properly. In severe cases, it can also lead to the system freezing up.
Check the Outdoor Unit
If the indoor unit is running but the outdoor unit is off, humming, clicking, or silent, the issue may involve a capacitor, contactor, wiring, refrigerant pressure, or compressor protection.
Common Reasons an AC Runs But Does Not Cool
When an AC is running but not cooling, the system is usually struggling with heat transfer, airflow, electrical operation, or refrigerant movement. Florida heat puts heavy demand on air conditioners, especially during long summer cycles, so even a small issue can quickly become noticeable indoors.
Dirty Air Filter or Restricted Airflow
Airflow is one of the first things to check. A dirty filter, blocked return, closed vents, dirty blower wheel, or restricted evaporator coil can reduce the amount of air moving across the coil. When airflow drops, the home may feel warm even though the system keeps running.
Frozen Evaporator Coil
If the indoor coil freezes, the AC may stop cooling almost completely. You may notice weak airflow, ice on copper lines, water around the air handler, or the system running constantly. Learn more on our AC freezing up page.
Low Refrigerant or Refrigerant Leak
Low refrigerant usually means there is a leak somewhere in the system. Refrigerant is what allows the AC to absorb heat from inside your home and release it outside. If the charge is low, the system may blow warm air, freeze up, run longer than normal, or fail to keep up during the hottest part of the day.
Signs You Need Professional AC Service
- The AC is blowing warm air from the vents
- The thermostat is set correctly but the house stays hot
- The outdoor unit is not spinning or not turning on
- The air coming from vents feels weak
- The AC runs all day and never reaches the set temperature
- Ice is forming on the refrigerant lines or coil
- Water is leaking from the indoor air handler
- The breaker trips when the AC starts
- The system makes humming, buzzing, rattling, or grinding noises
AC Not Cooling vs. AC Blowing Warm Air
Homeowners often describe cooling problems in different ways. “AC not cooling” may mean the system cools a little but cannot keep up. “AC blowing warm air” usually means the air from the vents feels noticeably warm or room temperature. Both problems can overlap, but the causes may be different.
AC Not Cooling Enough
If your AC is cooling slightly but not reaching the thermostat setting, the issue may be dirty coils, low refrigerant, poor airflow, undersized equipment, duct leakage, attic heat gain, or a system that is aging and losing capacity.
AC Blowing Warm Air
If the vents are blowing warm air, the issue may involve the outdoor condenser, refrigerant charge, compressor, reversing valve, thermostat settings, or an electrical failure. For more detail, visit our AC blowing warm air page.
Why Fast Diagnosis Matters in Florida Heat
In South Florida, an AC that is not cooling can go from uncomfortable to urgent quickly. Long run times, high humidity, heat inside the home, and repeated failed starts can all place additional stress on the system. Waiting too long may turn a simple repair into a more expensive problem.
Koolray Heating and Air checks the full cooling system instead of guessing. That means looking at thermostat operation, airflow, filter condition, drain safety switches, refrigerant performance, electrical components, condenser operation, coil condition, and the temperature split across the system.
Airflow Testing
We check for weak airflow, dirty filters, blocked returns, blower problems, duct issues, and coil restrictions that can stop your AC from cooling correctly.
Refrigerant Diagnosis
We evaluate system pressures, temperature readings, coil performance, and signs of refrigerant leaks or low charge that can reduce cooling capacity.
Electrical Testing
We inspect capacitors, contactors, wiring, breakers, compressor operation, fan motors, and safety controls to find the real cause of the cooling failure.
Should You Turn the AC Off?
If your AC is not cooling and you see ice, hear loud electrical noises, smell burning, notice water leaking, or the breaker keeps tripping, turn the system off and call for service. Continuing to run the system can make the problem worse.
If the system is simply not keeping up but there is no ice, no burning smell, no breaker issue, and no water leak, you can check the filter and thermostat first. If those are fine and the system still is not cooling, professional diagnosis is the safest next step.
Related Cooling Problems
Need AC Repair Today?
If your AC is not cooling in West Palm Beach, Loxahatchee, Wellington, Royal Palm Beach, or Westlake, contact Koolray Heating and Air. We will help find the cause and explain your repair options clearly.
AC Not Cooling Service Areas
Koolray Heating and Air provides AC repair and cooling troubleshooting for homeowners throughout Palm Beach County and nearby areas.
For general cooling service, visit our main AC repair page.
Frequently Asked Questions About an AC Not Cooling
Why is my AC running but not cooling the house?
The most common causes are restricted airflow, a dirty filter, a frozen coil, low refrigerant, a dirty condenser coil, thermostat problems, or an outdoor unit issue. A technician can test the system and determine whether the issue is airflow, refrigerant, electrical, or mechanical.
Can a dirty air filter make my AC stop cooling?
Yes. A dirty air filter can restrict airflow across the evaporator coil. This can reduce cooling, cause the system to run longer, increase humidity, and in some cases make the coil freeze.
Should I turn off my AC if it is not cooling?
Turn the AC off if you see ice, smell burning, hear unusual electrical sounds, notice water leaking from the air handler, or the breaker trips. If the AC is just struggling to keep up, check the thermostat and filter first, then call for service if the problem continues.
Why is my AC cooling during the morning but not in the afternoon?
This can happen when the system is low on refrigerant, the condenser coil is dirty, airflow is restricted, the ductwork has problems, or the equipment is losing capacity. Afternoon heat exposes problems that may not be obvious during cooler parts of the day.
Can low refrigerant cause my AC not to cool?
Yes. Low refrigerant can prevent the system from absorbing and removing heat properly. It may also cause the evaporator coil to freeze. Since refrigerant does not get used up like fuel, low refrigerant usually means there is a leak.
Why is my outside AC unit not running?
The outdoor unit may not run because of a bad capacitor, contactor, tripped breaker, wiring issue, failed fan motor, compressor problem, or safety control. You can read more on our outdoor unit not turning on page.
Why is my AC blowing weak air from the vents?
Weak airflow can be caused by a dirty filter, blower motor issue, dirty evaporator coil, duct restriction, closed dampers, blocked returns, or a frozen coil. Visit our weak airflow from vents page for more details.
How fast should my AC cool my house?
Cooling speed depends on outdoor temperature, home insulation, humidity, system size, duct condition, and how hot the home was when the system started. If the AC runs constantly and cannot lower the temperature, the system needs diagnosis.
Can a thermostat cause the AC not to cool?
Yes. Incorrect settings, bad batteries, wiring issues, failed thermostat controls, or poor thermostat location can keep the system from cooling properly. If the thermostat is blank or not responding, check our thermostat not working guide.
Who should I call for AC not cooling in West Palm Beach or Loxahatchee?
Call Koolray Heating and Air at 561-398-1073. We service AC cooling problems in West Palm Beach, Loxahatchee, Wellington, Royal Palm Beach, Westlake, and nearby Palm Beach County areas.
Schedule AC Not Cooling Repair
When your AC is not cooling, Koolray Heating and Air can help you figure out what is wrong and what to do next. Whether the issue is airflow, refrigerant, electrical, thermostat-related, or a failing outdoor unit, we will provide straightforward service and clear repair recommendations.