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There’s nothing worse than coming home to a hot, stuffy house on a day when your air conditioner should be working overtime. Thankfully, there are ways to troubleshoot the issue before calling an HVAC company. Service Hero is here to provide a solution. If you’ve found yourself sweating indoors with no relief, keep reading to learn how to identify the cause of your troubles and determine if it’s something you can fix on your own or if you need to contact an HVAC specialist for an AC repair.

Customer Reviews

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Bobby Hett

We had a main line drain clog under the house. Russell was our technician and approached the problem from outside the house, working retrograde from a trap in the front yard. I was skeptical but it worked when my efforts with a cable inside the house had failed. He was very professional and pleasant to deal with.  We asked him to install a cleanout closer to the house for future use and we were very satisfied with the work.

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Lori Mand

Tyler is the best! He came to our parent's house, knew exactly what the problem was, and explained it to us without the typical guesswork. I'd recommend him any time you need a good plumber.

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Narendran Dhanaram

Overall, It was a very good experience with the Service Hero team. I was able to schedule an appointment late in the night. They are truly 24x7. The help desk team was very professional, courteous, and friendly. All responses were timely. The field technician showed up on time and diagnosed the issue accurately. Kudos to the Service Hero team!

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Start with Your Thermostat 

It might seem obvious, but your thermostat can often be the root of sudden air conditioning failures. A quick check of its settings can sometimes resolve the issue entirely. Make sure that the thermostat is set to “Cool” mode. It’s not uncommon for it to be accidentally switched to “Heat” or “Off.” Next, verify the temperature setting. If your thermostat is set higher than the current room temperature, the air conditioner won’t kick on. Adjust the temperature to a cooler setting to see if that prompts the system to start. If your thermostat uses batteries, replace them. Weak batteries can lead to communication issues between the thermostat and your HVAC system. Also, check the screen for error messages or unusual symbols that might indicate a problem. Some digital thermostats will flash error codes that can guide you toward the issue. In some cases, thermostats can experience internal malfunctions, like sensor failures. If none of these steps resolve the problem, a faulty thermostat may be to blame. In this scenario, it’s best to reach out to an HVAC specialist to inspect and potentially replace the device. 

Take a Look at the Circuit Breaker 

If your AC suddenly stops working, a tripped circuit breaker could be the culprit. Locate your home’s electrical panel and identify the breaker labeled for your air conditioner. If the breaker has tripped, you’ll notice it’s in the “off” position or somewhere in between. To reset it, switch the breaker fully to the “off” position, then back to “on.” If this restores power to your AC, then your problem is solved. However, if the breaker trips again shortly after resetting, this indicates a more serious issue. Possible causes include overloaded circuits, wiring problems, or a malfunction within the air conditioning system itself. Continuing to reset the breaker without taking care of the cause can result in electrical damage or create a fire hazard. To stay safe, avoid repeated attempts to reset the breaker and contact a professional for help. An HVAC specialist can diagnose electrical issues and make sure your system is working as safely and efficiently as possible.

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Check for Airflow Problems 

When airflow is restricted, your system can struggle to cool your home or shut down altogether. Fortunately, many airflow issues can be solved with simple fixes. Start by examining your air filters. A clogged or dirty filter can choke your AC system, forcing it to work harder and reducing its efficiency. If your filter looks dirty, replace it immediately. Make it a habit to check and replace filters every 1–3 months, especially during heavy use. Next, inspect your vents. Ensure that none of them are blocked by furniture, rugs, or curtains. Restricted airflow at the vents can disrupt cooling throughout your home. Freeing up these obstructions can make a noticeable difference in your system’s performance. Don’t forget to check your outdoor condenser unit. Leaves, dirt, and grass can accumulate around the unit and block airflow. Clear the area around the condenser, and gently hose off the fins to remove built-up grime. Avoid using high-pressure settings because these can damage the delicate fins.

Keep Up with Maintenance 

Skipping routine care can lead to dirty coils, refrigerant leaks, and worn-out components, all of which can cause your system to break down unexpectedly. Scheduling annual maintenance with an HVAC company is important for your system’s longevity and efficiency. Ideally, you should book a tune-up before the start of the cooling season. During a professional maintenance visit, a technician will inspect your system, clean the internal components, and fix small issues before they become more expensive problems. In addition to professional servicing, there are maintenance tasks you can perform yourself. Regularly replace air filters, keep the area around your outdoor unit clear of debris, and monitor for unusual sounds or performance issues. A little proactive care can go a long way in preventing unexpected breakdowns. 

Do You Need a Professional Air Conditioning Repair?   

Persistent problems, unusual noises, strange odors, or a system that won’t turn on at all are signs that it’s time to call an expert for AC repair. When you’re dealing with an AC emergency, you need an HVAC company you can rely on. Service Hero specializes in diagnosing and repairing all types of air conditioning systems. Our skilled technicians have the experience to identify the cause of your system’s failure and get it running again quickly. If you’ve followed these steps and your air conditioner still isn’t working, contact us and schedule an appointment for your air conditioning repair or maintenance service.

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