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Don’t Sweat It: Easy Central AC Troubleshooting

AC Troubleshooting

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Running into problems with your central air conditioning system can be frustrating, especially during the hot summer. The good news is that many common AC problems have easy solutions that you can troubleshoot yourself. In this article, we’ll discuss some of the most common central AC problems and how to fix them.

1. Dirty Air Filter

A dirty air filter is one of the most common causes of AC problems. Over time, your air filter can become clogged with dirt and debris, restricting airflow and causing your AC to work harder than it needs to. This can lead to a range of issues, including reduced cooling performance, increased energy consumption, and even system breakdowns.

Fortunately, replacing your air filter is a quick and easy fix that you can do yourself. Simply locate your air filter (usually found in your furnace or air handler) and replace it with a new one. Be sure to choose the right size and type of filter for your system, and replace it every one to three months to keep your AC running smoothly.

2. Low Refrigerant

If your AC isn’t producing enough cool air, it may be low on refrigerant. Refrigerant is the substance that absorbs heat from inside your home and moves it outside, allowing your AC to cool your home. Over time, refrigerant levels can decrease due to leaks or other issues, reducing cooling performance.

If you suspect your AC is low on refrigerant, it’s best to call a professional HVAC technician to diagnose and fix the issue. Adding more refrigerant without addressing the underlying problem can further damage your system.

3. Frozen Evaporator Coil

If your AC is running but not producing cool air, your evaporator coil may have frozen. This can happen when the coil becomes too cold due to restricted airflow or low refrigerant levels, causing condensation to freeze and block the coil.

To fix a frozen evaporator coil, turn off your AC and let the coil thaw out completely. This may take several hours, so be patient. Once the coil is thawed, check and replace your air filter if necessary. If the problem persists, call a professional to diagnose and fix the issue.

4. Faulty Thermostat

If your AC isn’t turning on or off when it should, your thermostat may be faulty. Check to ensure that your thermostat is set to the correct temperature and that it’s in cool mode. If your thermostat is battery-powered, replace the batteries and see if that fixes the issue.

Check the wiring to see if your thermostat is hardwired to ensure everything is connected properly. If you’re uncomfortable working with electrical wiring, it’s best to call a professional to diagnose and fix the issue.

5. Blocked Condenser Unit

The condenser unit is the outdoor component of your central AC system, and it’s responsible for releasing heat from your home. If the condenser unit becomes blocked by dirt, leaves, or other debris, it can’t do its job effectively, reducing cooling performance and increasing energy consumption.

To fix a blocked condenser unit, turn off your AC and clear away any debris that may be blocking the unit. Use a garden hose to gently clean the fins on the unit, being careful not to bend them. If the problem persists, call a professional to diagnose and fix the issue.


While central AC problems can be frustrating, many common issues have easy solutions you can troubleshoot yourself. Replacing your air filter regularly, checking your thermostat, and keeping your condenser unit clean can keep your AC running smoothly and efficiently. If you encounter more serious problems, don’t hesitate to call a professional for help. Regular maintenance and repairs can help extend the life of your central AC system and keep your home cool and comfortable all summer long.

Do you need an air conditioner service in Pickering? Our team at Climate Experts is ready to help you. We believe that regular maintenance is key to avoiding costly repairs and sky-high bills — and our expert team will deliver topnotch services to ensure this for you. Let us keep your AC unit working efficiently. Contact us for a free estimate today!

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