Why Is My AC Running Nonstop?

There’s nothing quite like walking into a cool, air-conditioned home on a hot Indiana summer day. However, if you’re wondering why your AC is running nonstop, you’re not alone. Many homeowners face this issue, especially during the peak summer months. A constantly running AC can lead to skyrocketing energy bills and may indicate underlying issues with your HVAC system. 

Explore some common causes, potential consequences, and quick solutions for constant AC operation issues from the team at Dugan Air Heating & Cooling.

Common Causes for an AC Running Nonstop

Several factors can cause an air conditioner to continuously run. Understanding the root cause is the first step in effectively addressing constant AC operation issues. Usually, it’s due to one or a combination of these scenarios:

• Incorrect thermostat settings: If the temperature is set too low, especially during hot weather, your system may run continuously in an attempt to reach the set temperature.
• Dirty or clogged air filters: Air filters clogged with dust and debris restrict airflow, forcing the air conditioner to work harder and potentially causing it to run longer than necessary. Check your AC filter monthly during high-use seasons. 
• Refrigerant issues: Low refrigerant levels or refrigerant leaks can prevent the air conditioner from cooling the air effectively. This can cause the system to run constantly.
• Undersized AC unit: An AC unit that’s too small for your home will have to run continuously just to maintain a comfortable indoor temperature. 
• Dirty coils: Dirty evaporator and condenser coils reduce the system’s ability to absorb and release heat, which can cause the unit to run nonstop.
• Leaky ducts: If the air ducts are leaking, a significant amount of cooled air can escape, causing the thermostat to detect warmer temperatures and signal the AC to keep running.
• Faulty thermostat: Sometimes, the thermostat might be malfunctioning and continuously signaling the AC to run.
• Poor insulation: Drafty windows or gaps around doors can force your system to work overtime. Sealing air leaks, upgrading weather stripping, and adding insulation can improve your home’s energy efficiency.

Potential Consequences of a Constantly Running AC

A constantly running AC can consume up to 30% more energy than a properly cycling system. Letting your air conditioner run continuously without addressing the root problem can also lead to other consequences, such as:

• Higher energy bills: The longer your AC runs, the more electricity it uses. Over time, this can significantly increase your utility costs.
• Increased wear and tear: Constant operation puts additional stress on the components of your AC system, reducing its lifespan and increasing the likelihood of breakdowns.
• Reduced comfort: Poor airflow, inadequate cooling, or excessive humidity can make indoor conditions uncomfortable.
• Poor humidity control: When your AC runs nonstop, it may fail to dehumidify your home. Excess humidity can create a muggy indoor environment, which encourages mold growth and worsens allergies or asthma symptoms.
• Potential system failures: Ignoring the issue for too long could result in complete system failure. What started as a simple fix might turn into a costly repair or even a full AC replacement.
• Environmental impact: An overworked AC unit consumes more power, which contributes to a larger carbon footprint. 

Quick Solutions for a Nonstop Running AC

Not every air conditioner problem requires the help of an HVAC technician. These troubleshooting tips can often fix an AC running continuously without the need for professional intervention, saving you both time and money:

• Check the thermostat: Ensure your thermostat is set to “AUTO” instead of “ON.” If it’s set to “ON,” the fan runs continuously, regardless of whether the system is actively cooling.
• Install a programmable thermostat: If your current thermostat is outdated, upgrading to a programmable or smart thermostat can help optimize cooling cycles. 
• Replace or clean the air filter: A dirty filter can significantly reduce your AC’s efficiency. Replace the filter every one to three months.
• Inspect the outdoor unit: Clear any leaves, grass, or dirt blocking the outdoor unit. Obstructions can limit ventilation and cause the system to overwork.
• Check the vents: Blocked vents can disrupt airflow, causing your system to work harder than necessary.
• Seal leaky ducts: Use foil tape to seal visible gaps. For a more permanent fix, consider having the ductwork professionally inspected and sealed.

Even if you fix the immediate issue, routine AC maintenance is key to preventing future problems. Proactive DIY inspections and annual HVAC tune-ups can catch minor inefficiencies early, preventing long-term damage, saving you money on repairs, and helping your air conditioner run efficiently throughout the seasons.

When To Call a Professional

Knowing when to call for AC repair can prevent small problems from becoming major issues and complete breakdowns. Here are some signs it’s time to contact an HVAC professional for an air conditioning repair:

• DIY fixes aren’t working: If you’ve changed the air filter, checked the thermostat settings, and inspected visible components, and the air conditioner still won’t stop running, it’s time to contact a professional.
• Strange noises and odors: Unusual sounds or musty/burning smells could indicate electrical issues, mold, or failing mechanical parts that require professional attention.
• Inconsistent cooling: If certain rooms are cold while others remain warm, or if the air conditioner never seems to cool the house properly, a technician should assess the issue.
• Rising energy bills without increased usage: A sudden spike in your utility bills is a sign your system is working inefficiently and may need a professional diagnosis.
• System is more than 10 to 15 years old: If your system is older and experiencing frequent issues, a full system evaluation can determine whether a full AC replacement would be more cost-effective in the long run.

Contact Dugan Air Heating & Cooling If Your AC Is Running Nonstop

Dugan Air Heating & Cooling provides top-quality heating and cooling services with a unique blend of premium service and a fun, no-shenanigans approach. Backed by our friendly leprechaun mascot, Dugan, we deliver exceptional comfort to your home while creating a memorable customer experience. We aim to be the go-to choice for homeowners seeking both comfort and a personal connection.

Contact us today for a professional AC assessment and experience the Dugan Difference. We provide golden service with a touch of Irish charm and a strong commitment to our local community.