Why Does My AC Keep Running? Fix It Now!

Is your AC running endlessly, even after reaching the set temperature? Do you hear it humming continuously, struggling to shut off when it should? This continuous operation increases utility bills and puts extra pressure on your cooling system, causing potential breakdowns.

Ignoring these warning signs could result in expensive AC repairs in Noblesville or even a complete system failure. In this guide, Good Guys Home Service reveals the top reasons your AC won’t turn OFF—and how to fix them. Read the blog and understand the key points to prevent costly HVAC repairs and restore your home’s comfort!

Is It Normal for an AC to Run All Day?

On extremely hot days, it is common to run AC constantly and have regulated indoor temperature. A properly functioning air conditioner should cycle every 15-20 minutes and turn off 2-3 times an hour. If air conditioning system runs all the time, there may be a problem with air filter or refrigerant level or thermostat.

Common Problems Caused by a Constantly Running AC:

• Higher Energy Bills: A constantly running AC compressor increases electricity costs.
• Wear & Tear: If your HVAC won’t turn OFF, components will wear out faster.
• Inconsistent Cooling: If the AC is running but not cooling, airflow issues could be the cause.

If you’re asking, “Why does my AC keep running after reaching temperature?”, keep reading to find out.

Why Won’t My AC Turn Off?

If your air conditioning system won’t shut OFF, one of these common HVAC problems in Noblesville could be the cause:

1. Thermostat Issues

   A broken thermostat may not properly signal your AC to shut OFF.
   Cause: Malfunctioning thermostat fails to communicate properly with the AC system.
   Solution: Reset the thermostat settings, replace batteries, or upgrade to a new model.

2. Wrong Thermostat Settings

   If the fan is set to “ON” instead of “Auto”, the blower will run constantly and it seems like your cooling system will not turn OFF.
   Cause: Incorrect settings force continuous fan operation.
   Solution: Switch the fan setting to AUTO to stop unnecessary operation.

3. Electrical Problems

   A stuck relay switch or a faulty compressor contactor can prevent the AC from shutting down.
   Cause: Faulty electrical components prevent proper shutdown.
   Solution: A licensed HVAC technician should inspect and replace faulty components.

4. Dirty Air Filter

   A clogged air filter blocks airflow, causing AC run non-stop and overheat.
   Cause: Clogged filters restrict airflow, making the system overwork.
   Solution: Replace your air filter every 1-3 months.

5. Frozen Evaporator Coils

   If your air handler does not turn off, your evaporator coils can be frozen with ice buildup.
   Cause: Limited airflow or refrigerant issues causes ice formation.
   Solution: Turn OFF the AC, let the ice melt, and replace the air filter.

6. Low Refrigerant Levels

   If your AC compressor runs nonstop, it leads to refrigerant leak and more cooling issues.
   Cause: Leaks or insufficient refrigerant force continuous operation.
   Solution: A professional HVAC technician should check and refill refrigerant levels.

7. Dirty Condenser Coils

   Dirt and debris deposits on the capacitor unit reduce efficiency, which causes AC to run non-stop.
   Cause: Dirt build-up affects the cooling efficiency and does AC overheating.
   Solution: Clean the outdoor capacitor unit and remove obstacles.

8. Incorrect AC Size

   An undersized AC unit will struggle to cool your home, causing it to run continuously.
   Cause: An undersized unit struggles to meet cooling demands.
   Solution: Opt AC upgrade for your home, consider top air conditioning installation in Noblesville.

Troubleshooting: DIY Steps to Fix an AC That Won’t Turn Off

Before calling a licensed technician for HVAC repair services, do it yourself the following troubleshooting steps:

Step 1: Adjust Your Thermostat Settings

• Raise the set temperature by a few degrees and see if the AC shuts OFF.
• Make sure the fan is set to AUTO (not ON).

Step 2: Check for Airflow Restrictions

• Replace a dirty air filter every few months to improve efficiency.
• Clear debris from outdoor condenser unit properly to prevent overheating.
• Open all supply vents in your home for airflow and better circulation.

Step 3: Reset Thermostat Settings

• Switch OFF the thermostat for 5 minutes, and then again turn it ON.

Step 4: Inspect for Ice on the Coils

• If the evaporator coils are frozen, turn OFF the alternating current and let ice melt before restarting the system.

Step 5: Check Your Outdoor Unit

• If the exterior AC unit is not turned on, it may have a tripped circuit breaker.
• If the alternating current is switched on and on each couple of minutes, it may have low refrigerant levels.

When to Call an HVAC Technician

If you’ve tried these troubleshooting steps and your AC is still running non-stop, it’s time to call a professional. Good Guys Home Service can help diagnose and repair any HVAC issue to restore your home’s comfort.

Signs You Need Professional AC Repair:

• AC compressor not shutting OFF.
• Outside AC unit not turning ON.
• Air conditioner keeps turning on and off.
• AC not turning OFF when temp is reached.
• Air conditioner running constantly but not cooling.
• AC not keeping up with thermostat settings.

Schedule Your AC Repair with Good Guys Home Service!

If your AC won’t stop running, don’t wait for a major breakdown. Good Guys Home Service provides fast, reliable, and affordable HVAC repairs to keep your home cool and comfortable.

Call us today to book your service!