Why Your Air Conditioner Keeps Running Constantly

Dirt and Debris Buildup

Over time, dust, dirt, and other debris collect inside your AC, causing inefficiencies if left unattended. If your system stops running, check the filter, fan, condenser, or other internal components for buildup. A general rule of thumb is changing AC filters every three months, but it depends on usage and other factors. Additionally, sticks, leaves, and grass clippings can collect inside your condenser unit outside, prompting routine cleaning and maintenance. In the case of severe damage, a complete air conditioner unit replacement may be the best solution to restore functionality and efficiency.

Low Refrigerant

Another reason for a constantly running AC is low or no refrigerant. Your air conditioner contains a refrigerant, also known as Freon, which absorbs heat from the air and cools your living spaces. If you have a refrigerant leak or an old system that’s running low on Freon, your system will run constantly trying to cool the air. Refrigerant leaks also pose serious safety risks, as they can cause headaches, dizziness, loss of consciousness, nausea, and asphyxiation. The most effective way to mitigate such issues is to schedule emergency AC repairs with a professional technician.

A Stuck Fan Limit Switch

While it may not be common, the fan limit switch can get stuck in the “on” position, forcing the air conditioner to keep running. You can troubleshoot the problem yourself, but if you prefer a more hands-off approach, call a professional HVAC company. Check the limit switch if it is stuck and turn it off to resolve the issue. If the system continues to run or the switch reverts to the “on” position, it may be time to consider emergency AC repairs. The last thing you want is a system that runs nonstop, wasting energy and increasing the likelihood of component failure.

Wiring Issues

Disconnected or loose electrical wires inside your air conditioning unit can cause constant running. Wiring issues require extensive expertise and skill, so refrain from DIY AC repairs if you don’t know how to work with electricity safely. A highly trained technician can inspect existing wiring and determine if rewiring is necessary. Attempting DIY wiring repairs without the knowledge or tools needed can damage your HVAC system, cause electrocution, or start a fire.

Whether your system is running constantly or indicates signs of inefficiency, early intervention is crucial to prevent further damage and costly air conditioning unit replacements. At Aire Serv, we provide quality HVAC services, addressing all your indoor air quality needs. Contact us today and book an appointment with our technicians to enjoy a functional and efficient system for years to come.