Why Is My AC Running but Not Cooling?

It’s one of the most frustrating summer experiences; you hear your air conditioner kick on, but the air coming out of the vents is lukewarm at best. You’re not imagining it, and it’s a common problem we see. At Alpha Comfort Systems, we know that a functioning AC is crucial for your comfort, and several issues can cause this specific problem. Before you get too worried, let’s explore some of the typical reasons why your AC might be running without actually cooling your home.

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Check for a Clogged Air Filter

This is the number one culprit we encounter. A dirty filter restricts airflow to your system. When this happens, the evaporator coil can get too cold and freeze over, which severely limits the system’s ability to cool the air. We always advise homeowners to check their filter first as a simple fix.

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Look for a Dirty Outdoor Unit

The outdoor unit, or condenser, is responsible for releasing the heat that's been removed from your house. If it’s covered in dirt, leaves, or other debris, it can’t do its job effectively. This traps heat in the system, preventing it from cooling your home. Keeping this unit clean is essential for proper operation.

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Incorrect Thermostat Settings

Sometimes the solution is the simplest. It's possible the thermostat was accidentally set to "FAN" instead of "COOL." This setting will circulate air, but the cooling function won't engage. Another possibility is a low battery or other malfunction, preventing it from properly communicating with your entire home air conditioning system.

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Low Refrigerant Levels

If your system is low on refrigerant, it's almost always due to a leak. This is a more complex issue that reduces cooling power significantly. A refrigerant leak is not a DIY fix and requires professional attention to not only recharge the system but, more importantly, to find and repair the source of the leak.

While some of these issues can be addressed by a homeowner, others require professional expertise. If you’ve checked the basics and still have a problem with your home air conditioning, it's time to call the pros. Contact Alpha Comfort Systems today! Our team is ready to diagnose the problem and get your home cool and comfortable again.

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