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Understanding Why Your Air Conditioner Is Not Working

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As summer approaches, homeowners will rely on their air conditioners to keep their homes cool and comfortable. However, if your air conditioner suddenly stops working, it can be frustrating and inconvenient. Understanding common reasons why your air conditioner is not working can help you troubleshoot the problem and determine if you need to call a professional.

Dirty Air Filters

Dirty air filters are among the most common reasons an air conditioner may stop working. Air filters help to remove pollutants, allergens, and other particles from the air before it enters your home. Over time, these filters can become clogged with debris, reducing airflow and causing the unit to work harder than it should. This can lead to a variety of issues, including a frozen evaporator coil, which can cause the unit to stop working altogether. Regularly changing your air filters can help prevent these problems and keep your air conditioner running smoothly.

Refrigerant Leaks

Another common reason an air conditioner may stop working is refrigerant leaks. Refrigerant is the substance that helps to cool the air in your home. If there is a leak in the system, the refrigerant can escape, causing the unit to stop working. Signs of a refrigerant leak include reduced cooling performance, hissing or bubbling noises coming from the unit, and ice buildup on the evaporator coil. If you suspect a refrigerant leak, it is important to call a professional to repair the system.

Thermostat Issues

Sometimes, the problem with your air conditioner may be something other than with the unit itself but with the thermostat. If the thermostat is malfunctioning, it may not be sending the correct signals to the air conditioner, causing it to turn on and off at the wrong times or not at all. Common thermostat issues include dead batteries, faulty wiring, and incorrect temperature readings. Checking the thermostat and replacing the batteries can often resolve these issues. If the problem persists, it may be time to replace the thermostat.

Electrical Problems

Air conditioners rely on electricity to power their motors, fans, and other components. If your unit has an electrical problem, it may not turn on or stop working altogether. Common electrical issues include blown fuses, tripped breakers, and faulty wiring. These issues can be dangerous to address on your own and should be handled by a professional.

Lack of Maintenance

Finally, maintenance can prevent your air conditioner from stopping working. Like any other mechanical system, air conditioners require regular upkeep to perform at their best. This includes cleaning the unit, lubricating moving parts, tightening loose connections, and checking refrigerant levels. Neglecting these tasks can lead to a variety of issues, including reduced cooling performance, increased energy bills, and premature system failure.


A malfunctioning air conditioner can make your home uncomfortable and even unsafe, especially during the hot summer months. Understanding common reasons why your air conditioner is not working can help you troubleshoot the problem and determine if you need to call a professional. Regularly maintaining your system can prevent many of these issues and keep your air conditioner running smoothly all summer.

Don’t let your air conditioner suffer this summer! Contact Climate Experts today and schedule your air conditioner maintenance in Ajax. Our team of skilled professionals can ensure that your unit is running efficiently and effectively, so you can enjoy a cool and comfortable home all season long. Call us at 1-855-241-7171 for an appointment!

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