What Should I Do if My Air Conditioner Won’t Stop Running?

Your air conditioner has been running nonstop, and that constant hum is doing more than just testing your patience—it’s driving up your energy bills and straining your system. If you’re worried about what’s causing it and bracing for a costly repair, take a deep breath. At Van Drunen Heating & Air Conditioning, we’ve spent over 50 years helping homeowners tackle this exact problem. Let’s dive into what’s happening with your AC and how you can fix it before it becomes a bigger issue.

Common Causes of a Non-Stop Air Conditioner

Several issues can cause your air conditioner to run continuously. Understanding these problems helps you determine whether you need a simple fix or professional help.

Electrical Problems

Electrical components inside your AC unit can malfunction, keeping the system running when it should shut off. A relay switch or capacitor stuck in the closed position continues sending power to the compressor. These electrical issues often require professional repair or replacement.

Thermostat Issues

Sometimes the problem isn’t that your AC can’t turn off—it’s that it’s set incorrectly. Some of the most common thermostat issues are:

• Fan setting: If your fan is set to “ON” instead of “AUTO,” it runs constantly. The AUTO setting only runs the fan during cooling cycles.
• Temperature setting: Someone may have lowered the temperature more than usual, causing the AC to work harder to reach the set point.
• Old or dirty thermostat: After about 10 years, thermostats can misread room temperature due to dirt on sensors or damaged wiring.

Dirty Condenser Coil

Your outdoor unit’s condenser coil releases heat from your home. When dirt and debris accumulate on this coil, it limits heat exchange. This forces your air conditioner to run longer to cool your home effectively.

Frozen Evaporator Coil

Ice on your evaporator coil prevents it from absorbing heat from indoor air. This typically happens due to:

• A dirty air filter restricting airflow
• Low refrigerant levels
• Blocked airflow from closed vents

Undersized Unit

An air conditioner that’s too small for your home will struggle to reach the desired temperature. It runs constantly, trying to cool a space beyond its capacity, wasting energy and wearing out faster.

What You Should Do to Fix It

Before calling a professional, try these troubleshooting steps that might solve the problem.

Check Your Thermostat Settings

Start with the simplest solution. Set your thermostat a few degrees higher than the current room temperature—this should signal the AC to shut down. Then switch the fan setting from “ON” to “AUTO” so it only runs during cooling cycles.

Clean or Replace Your Air Filter

A clogged air filter makes your system work harder. Check your filter monthly and replace it when it’s dirty. Clean filters allow proper airflow and prevent your AC from overworking.

Inspect Your Outdoor Unit

Remove any debris around your condenser unit. Clear away leaves, grass, and other materials that might block airflow. Good airflow helps the condenser coil release heat effectively.

Contact a Professional

If these steps don’t solve the problem, it’s time to call a professional. Certified technicians can diagnose electrical issues, fix refrigerant leaks, and handle complex repairs that require professional expertise.

Trust Van Drunen for Your AC Repairs

When your air conditioner won’t stop running, prompt action prevents bigger problems and higher energy bills. Van Drunen Heating & Air Conditioning has served homeowners for over 50 years with reliable, affordable AC repair services. Our technicians will quickly identify your AC problems and provide lasting solutions.

Don’t let a constantly running air conditioner drain your wallet. Contact Van Drunen Heating & Air Conditioning today for fast service that keeps your home comfortable and your energy bills reasonable.