When the summer heat hits, the last thing you want is your air conditioning (AC) compressor failing. A malfunctioning AC compressor can leave you stuck with warm air blowing from your unit or, even worse, no air at all. Understanding the common reasons behind an AC compressor not working can help you troubleshoot and possibly fix the issue before you need to call a technician. In this blog post, we’ll walk you through the most common reasons your AC compressor might not be working and offer troubleshooting tips to help you get it up and running again.
One of the most common causes of a malfunctioning AC compressor is low refrigerant levels. Refrigerant is the substance that helps your AC absorb heat from the inside of your home and release it outside. If your refrigerant levels are low, your AC compressor won’t be able to function properly. The most common reason for low refrigerant is a leak in the system.
Tip: If you notice warm air blowing from the vents, check your refrigerant levels—low refrigerant could be the culprit, and it's best to have a pro recharge it.
Regular maintenance can help prevent refrigerant leaks, so it's always a good idea to schedule annual check-ups for your AC system.
The capacitor is an important component of your AC system that helps provide the initial power needed to start the compressor and fan motor. A faulty or damaged capacitor can prevent the compressor from turning on altogether.
The relay and contactor act as switches that turn the compressor on and off. If these components malfunction, the compressor won’t get the power it needs to operate. A bad relay or contactor could be the cause of your compressor not turning on or working intermittently.
Tip: If your AC compressor is not turning on, check the relay. A simple replacement might be all it takes to get it running again.
A clogged air filter can reduce airflow and cause the compressor to overheat, preventing it from working. Over time, dirt and debris can accumulate in the filter, making it harder for your AC to cool the air efficiently. This increased strain can cause the compressor to stop working.
The thermostat controls the temperature in your home by sending signals to your AC system. If your thermostat is malfunctioning, it may not send the right signals to the compressor, causing it to stop working. This could result in your AC not turning on or running inefficiently.
The condenser coil is responsible for releasing heat absorbed by the refrigerant. If the condenser coil is dirty or damaged, the compressor will have to work harder to release heat, potentially leading to overheating and failure. Regular cleaning and maintenance of the condenser coil are crucial for keeping the system running smoothly.
Tip: Dirty condenser coils can make your AC work harder, causing strain on the compressor. Give them a clean every season to keep things
The evaporator coil works with the refrigerant to absorb heat from inside your home. If the evaporator coil is dirty or damaged, it can cause your compressor to overheat and fail. Poor airflow due to a clogged filter or damaged coil can also contribute to compressor failure.
Over time, dirt and debris can build up inside the compressor, causing it to malfunction. A damaged compressor will also struggle to operate correctly, leading to a complete breakdown of the AC system. In some cases, a damaged compressor can be beyond repair and may need to be replaced.
If your AC unit was installed incorrectly, it could lead to issues with the compressor and other components. Improper installation can cause airflow problems, refrigerant leaks, or electrical issues that prevent the compressor from working.
Like any appliance, an AC compressor has a lifespan. If your compressor is over 10-15 years old, it may be reaching the end of its life. As compressors age, they become less efficient and more prone to failure.
How often should I replace my AC capacitor? Capacitors typically last 5-10 years. If your AC capacitor is showing signs of wear (such as buzzing or failure to start the compressor), it should be replaced sooner.
How do I know if my AC run capacitor is bad? If your AC starts but doesn’t cool properly, or if you hear unusual sounds like buzzing or clicking, your capacitor may be bad. A professional can test it to confirm.
What is the life expectancy of a capacitor? The average life expectancy of an AC capacitor is about 10 years. Regular maintenance can help extend its lifespan.
What services does EMG Air offer? EMG Air specializes in AC installation, maintenance, and repair services. We provide top-notch HVAC services to ensure your home stays comfortable year-round.
Why should I choose EMG Air? At EMG Air, we pride ourselves on our professional and reliable service. Our team is experienced in handling all types of AC problems, from minor repairs to major installations.
How can I schedule an appointment with EMG Air? You can easily schedule an appointment with us by visiting our website or giving us a call. We’re ready to help with all your HVAC needs!
In conclusion, there are many reasons why your AC compressor might not be working, but many of them can be resolved with a bit of troubleshooting and timely maintenance. If you're unable to fix the issue on your own or the problem persists, don’t hesitate to reach out to an HVAC professional. Regular upkeep and inspections can also help prevent future compressor failures and keep your AC running smoothly for years to come.
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