When the summer heat rolls into Palm Desert, a malfunctioning air conditioner can become more than just an inconvenience. One of the most common complaints we hear at PRO-Formance Heating & Air is, “My AC unit is running but not cooling.” It’s confusing—if the unit is on, why isn’t the air getting cooler?
Several potential issues could be behind the problem. Some are simple and easy to fix, while others require professional repair.
Clogged Filters Can Cause Your AC Unit Running but Not Cooling
The first thing to check is your air filter. Over time, dust and debris can clog it, restricting airflow. Without proper airflow, your system struggles to circulate cool air, even if it’s running.
This is a quick fix. Most homes in the Coachella Valley need filter changes every 1 to 3 months, especially in peak cooling season.
Low Refrigerant Can Lead to Your AC Unit Running but Not Cooling
Refrigerant removes heat from your home. If your system is low—due to a leak or improper charge—it won’t cool effectively. Warm air may blow from the vents, and you might see ice on the refrigerant lines.
Refrigerant handling requires certification. If you notice these signs, call PRO-Formance Heating & Air right away.
Frozen Evaporator Coils Stop Cooling
Restricted airflow can lead to frozen coils. This happens when the temperature drops too low inside the system. Ice forms and blocks the coil from absorbing heat.
You may notice the AC runs but doesn’t cool—or it shuts off entirely. Turn it off and let it thaw. If it keeps freezing, it’s time for a professional inspection.
Outdoor Unit Problems May Result in AC Unit Running but Not Cooling
Your outdoor unit plays a key role in cooling. If it’s dirty, blocked, or has a malfunctioning fan, it can’t release heat effectively. The system runs, but warm air stays inside.
Check for leaves, dirt, or debris around the unit. Listen for odd noises. Clean around the condenser. If the fan isn’t working, call a technician.
Thermostat Settings Could Be Wrong
Sometimes the issue is with the thermostat. If the fan setting is “on” instead of “auto,” it may run constantly without cooling. This can make it seem like the system isn’t working.
Check that the settings are correct. Also, try replacing the batteries. A smart or programmable thermostat can help avoid this issue in the future.
Duct Leaks May Let Cold Air Escape
Even with a running AC, leaks in your ducts can waste cool air. It may be escaping into your attic or crawlspace. You’ll feel little difference in your living areas.
Leaky ducts also affect indoor air quality. Sealing them improves cooling and can cut energy costs.
Electrical or Mechanical Issues Can Disrupt Cooling
If your AC unit is running but not cooling, it might have a deeper problem. Issues with the compressor, capacitor, or contactor can keep the system from working properly. It may run but won’t cool the home.
These issues need professional attention. If your system is inefficient or noisy, schedule a service call.
Regular Maintenance Prevents Cooling Problems
The best way to avoid this problem is to keep your system maintained. Annual tune-ups help catch small issues before they turn into big ones.
At PRO-Formance Heating & Air, we offer maintenance plans for Palm Desert’s extreme climate. Our team checks refrigerant, airflow, electrical parts, and more—so your system runs right when you need it most.
Call PRO-Formance Heating & Air for Help
Some problems can be fixed with a filter change or a setting adjustment. Others, like frozen coils or electrical failures, need expert service.
We’re proud to be Palm Desert’s trusted HVAC team. Our licensed technicians deliver fast, honest service. Whether it’s a quick fix or a full system replacement, we’ve got you covered. Call PRO-Formance Heating & Air today to schedule service and get your cooling back on track—before the heat gets worse.
