When Hamilton’s summer heat and humidity kick in, there’s nothing worse than an air conditioner that just isn’t keeping up. We hear from homeowners every year who are frustrated, uncomfortable, and wondering what’s gone wrong with their cooling system.
At Guest Plumbing and HVAC, we know how important it is to keep your home cool and comfortable all season long. Here are the five most common reasons your AC may not be cooling properly — and what you can do about them.
1. Dirty or Clogged Air Filters
The problem: Your air filter traps dust, pollen, and pet hair to keep your indoor air clean — but when it gets clogged, it restricts airflow. That makes your AC work harder while cooling less effectively.
What you can do: Check your filter every month during the summer. If it looks dirty, replace it. For most homes, every 1–3 months is ideal. A quick filter change can make a big difference in both comfort and efficiency.
2. Low Refrigerant Levels
The problem: Refrigerant is the lifeblood of your AC system. If levels are low, your unit can’t absorb and remove heat effectively. This can be caused by leaks or improper charging during installation.
What you can do: Refrigerant issues require a licensed technician. If you notice warm air, ice on the coils, or your AC running constantly, call us to inspect, repair leaks, and recharge your system to manufacturer specifications.
3. Blocked or Leaky Ductwork
The problem: Cool air travels through ducts to reach every room. If those ducts are clogged with dust, have holes, or have become disconnected, your cooled air could be escaping into unused spaces.
What you can do: Keep supply and return vents clear of furniture and dust. If you notice uneven cooling or some rooms warmer than others, a duct inspection and sealing may be needed. We can also professionally clean your ducts to improve airflow.
4. Faulty Thermostat
The problem: If your thermostat isn’t reading the temperature accurately, your AC may turn on or off at the wrong times. This can leave your home feeling warmer than it should.
What you can do: Make sure your thermostat is away from direct sunlight or heat sources. Change the batteries if needed. For improved accuracy and control, consider upgrading to a smart thermostat — we can help you choose and install the right one.
5. Outdoor Unit Problems
The problem: Your AC’s outdoor unit releases heat from your home. If it’s blocked by plants, dirt, or debris, or if the fan isn’t working properly, cooling efficiency drops.
What you can do: Keep at least two feet of clearance around the unit and gently clean off any dirt or leaves. If you hear strange noises or notice the fan isn’t spinning, give us a call for a full inspection.
When to Call the Professional
Some AC issues can be solved with simple maintenance, but others require a trained eye. If you’ve tried the basics and your system still isn’t cooling, it’s time to bring in a local expert.
At Guest Plumbing and HVAC, we know Hamilton’s summer climate inside and out — and we’re here to help you stay cool no matter how hot it gets. Our team offers thorough diagnostics, honest advice, and reliable repairs so you can enjoy a comfortable home all season long.
Let’s keep your AC running at its best this summer.
Call us at 905-745-1963or email info@guesthvac.com to book your AC service today.
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