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Why Does My AC Keep Shutting Off?


Trammell Heating & Air Delivers Five-Star Heating and Cooling Services to Buford, Georgia and the Surrounding Northeast Atlanta Metro Areas


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If you wonder, “Why does my AC keep shutting off?” know this is a common issue. A faulty AC can disrupt the comfort of your home, especially during the hotter months in Athens, GA. 

Whether your AC turns off intermittently or won’t stay on, understanding the reasons behind this can help you identify the best course of action. As one of the top HVAC companies in Athens, GA, Trammell Heating & Air is ready to solve your cooling problems.

We’ll explore why your air conditioner keeps turning off and steps for troubleshooting AC shutdowns.

It’s Short-Cycling

Short-cycling is when your air conditioner prematurely turns off its cooling cycle and restarts after only a brief pause. This frequent turning on and off can negatively impact the AC’s efficiency and longevity. Dirty air filters, improperly sized AC units, refrigerant leaks, and faulty thermostats can all lead to short-cycling. 

Dirty filters restrict airflow, causing overheating and shutdowns. Units that are too big cool rooms quickly but fail to adequately remove humidity, leading to frequent cycling. Refrigerant leaks also reduce cooling power, causing the unit to shut off too early. 

You Have a Malfunctioning Thermostat

“Why does my AC keep shutting off?” It could be an issue with your thermostat!

A thermostat serves as the control center for your air conditioner, determining when to start and stop based on the room temperature. If malfunctioning, it can cause your AC to act unpredictably. Thermostat problems range from incorrect settings — maybe it’s on “heat” instead of “cool” — to wiring issues that disrupt communication with the AC unit. 

Even the thermostat’s location can affect its efficiency; if placed in direct sunlight or near heat sources, it may misread the actual room temperature. Correctly maintaining your AC and configuring your thermostat can help avoid unnecessary AC shutdowns and maintain consistent cooling throughout your home.

Your Air Conditioner Has Electrical Problems

Electrical complications are another significant factor to consider. Tripped circuit breakers, faulty capacitors, and loose connections can all lead to operational failures.

Tripped breakers prevent circuit overload by cutting power, while faulty capacitors struggle to start the motor effectively. Loose connections may disrupt the power flow, causing intermittent shutdowns. Regular inspections by a professional ensure that the electrical components of your AC are safe and function reliably to avoid unexpected disruptions.

The Condensate Line Is Clogged

A clogged condensate line is one of the most common causes of AC shutdowns.

The condensate line in your air conditioner plays a crucial role in removing moisture from the air. If this line is clogged, it can cause water to back up into the system, potentially leading to a shutdown as a safety precaution. 

Common indicators of a clogged condensate line include visible water leaks around the AC unit, musty odors from stagnation or mold in the drip pan, and system shutdowns activated by the AC’s overflow prevention switch. Regular cleaning and inspection of the condensate drain are essential to prevent these issues and ensure your AC operates efficiently.

Your System Is Leaking Refrigerant

Refrigerant is essential for your air conditioner to produce cool air. A leak in the system can lead to several issues and is one of the top reasons for an AC shutting off. Refrigerant leaks not only pose a threat to the environment but also reduce the efficiency and effectiveness of your cooling system.

You may have a refrigerant leak if you notice:

  • Ice forming on the evaporator coils and other parts of the system
  • Strange sounds from the AC unit, suggesting escaping gas
  • Inconsistent cooling, resulting in warm spots

Prompt detection and repair of refrigerant leaks are crucial to prevent more severe problems and ensure your air conditioner continues to function optimally.

When Your AC Keeps Shutting Down, Rely on Trammell Heating & Air

If you still wonder, “Why does my AC keep shutting off?” let our team at Trammell Heating & Air lend a hand.

For any problem with your AC in Athens, GA, don’t hesitate to call us at 770-925-5506. Regular AC maintenance is key to calculating HVAC load and maintaining optimal performance. Contact Trammell Heating & Air today to keep your system running at its best!

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