Common Commercial AC Issues

Fred Ordine • October 1, 2025
Walking into the office and feeling like you’re in a sauna? Commercial air conditioning systems can often act up, and understanding the common commercial AC issues can help you nip problems in the bud. From strange noises to uneven cooling, we’ll cover what to look for and how to keep everyone comfortable.

Spot Common Commercial AC Issues Early

Strange AC sounds or sudden cooling problems often mean trouble. In fact, unusual noises in your AC unit frequently signal serious underlying issues. It’s smart to catch these early – a rattling vent or warm hallway today is much cheaper to fix than a full breakdown tomorrow.

As an expert tip, schedule regular tune-ups: one source says routine maintenance can extend an AC’s lifespan by about 40%. Fixing small issues now (like tightening a screw or replacing a worn belt) keeps your system running smoothly and avoids costly downtime later.

Strange AC Noises Signal Trouble

Unusual sounds from your AC – grinding, squealing, or banging – are red flags. According to experts, strange noises often mean the system is straining or parts are failing. For example, a clogged air filter can force the AC to work harder and run much louder. Loose screws, a failing fan motor, or refrigerant issues can also cause clanks and squeaks. Don’t ignore these clues because the sooner a technician checks your unit, the quicker small fixes (like lubricating motors or tightening parts) can prevent a bigger repair down the road.

Clogged Filters Block Cool Air

One of the simplest yet most common issues is dirty air filters. HVAC professionals warn that filthy filters and blocked vents can seriously restrict airflow. When airflow is cut off, some rooms stay hot, and the AC must run constantly. In fact, a dirty filter not only chokes off cool air but also makes fans work overtime and worsens indoor air quality.

To avoid this, check filters every month and replace them as needed. Also, keep all vents and returns clear of furniture or debris. Even small holes in the ductwork can leak cooled air away, so have ducts inspected and sealed if needed. 

Uneven Cooling Frustrates Everyone

It’s annoying when one office is freezing and another is sweltering. This uneven cooling often comes from blocked ducts or outdated controls. Experts explain that debris in ducts can create hot spots, and using a single thermostat for a large space often leads to imbalance. The fix is two-fold – first, inspect and clean your ductwork – remove dust, debris, or even pest nests that block airflow.

Second, consider an HVAC zoning system. With multiple thermostats or dampers, each area can maintain its own temperature. That way, every zone in your building gets just the right amount of cool air without overheating other spaces.

Frequent AC Cycling Means High Costs

If your AC turns on and off too often (short cycling), you’ll see it in your bills. Frequent cycling wastes energy and stresses the system; one industry guide warns it leads to higher bills and extra wear. In practice, this happens for a few reasons:

  • Dirty or clogged filters. A filthy filter chokes airflow, causing the unit to overheat and cycle constantly.
  • Thermostat problems. A bad or miscalibrated thermostat can’t read temperature correctly, so it turns the AC on and off erratically.
  • Electrical faults. Loose wiring or other electrical issues may cause the system to short-cycle unexpectedly.
  • Oversized AC unit. If the system is too large for your space, it cools very quickly and shuts off, then starts up again soon after.

You can keep the cycling in check and cut down energy waste by checking these points – replacing filters, calibrating or relocating the thermostat, fixing wiring, or consulting an HVAC contractor about proper sizing.

Hidden Leaks Can Damage Your AC

Water leaks around an AC are a serious problem waiting to happen. A clogged condensate drain line will back up and overflow quickly. Similarly, if the condensate drip pan is cracked or out of place, it can’t catch all the moisture, and water will spill out. Over time, leaking water can corrode equipment and damage ceilings or floors.

The good news is that prevention is straightforward – clear the drain line and clean the drip pan regularly. In fact, keeping air filters clean helps manage condensation levels, too. Routine maintenance prevents leaks from forming in the first place, so little drips never turn into big, costly floods.

Two AC units on an exterior wall

Let Professionals Deal With Common Commercial AC Issues

Dealing with these common commercial AC issues promptly will keep your Holiday, FL business cool, efficient, and comfortable. As your local HVAC contractor, Ordine’s Air Conditioning and Heating knows that on-time maintenance and fast repairs make all the difference.

Our friendly, certified technicians handle everything from AC repair and 24/7 emergency HVAC service to new AC installation, duct cleaning, and thermostat service – even commercial refrigerator and cooler repairs. Don’t sweat it when your AC acts up. Contact Ordine’s Air Conditioning and Heating today for expert help and keep your systems running smoothly.

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