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Even on mild days in Downers Grove, your AC should cycle on and off. A cycle should last 10-15 minutes. During extreme heat, add another 5 minutes. When it runs constantly, something is wrong. A system that never shuts off cannot cool your home efficiently. Ignoring the issue can lead to higher energy bills and added wear.
Your AC should not struggle when outdoor temperatures are mild. If it does, the system may not be working as it should. Early warning signs often appear before a full breakdown. Paying attention now can help you avoid larger repairs later.
Restricted Airflow From Dirty Filters
Restricted airflow is one of the most common causes of constant AC operation. When airflow drops, your system cannot remove heat effectively. The unit keeps running because your home never reaches the desired temperature.
Dirty air filters are often the cause. Dust and debris block airflow, reducing system performance. As airflow decreases, your AC must run longer to keep up. The added runtime increases wear on key components.
Blocked return vents can also affect airflow. Furniture, rugs, or debris may prevent air from circulating properly. Closed interior doors can also limit how air moves back through the system in some homes. Keeping vents open and filters clean helps your system run more efficiently.
Checking your filter every month during the cooling season can prevent this problem. Hold your filter and shine a flashlight through it. If you see light, the filter is still good. If you don’t, it is time to replace it. Replacing it when it has become full of debris is one of the simplest ways to protect your system.
Frozen or Dirty Evaporator Coils
The evaporator coil absorbs heat from the air inside your home. When the coil becomes dirty or frozen, it cannot transfer heat effectively. Your system may continue running, but cooling performance will drop.
Frozen coils often result from restricted airflow or low refrigerant levels. Dirt buildup can also prevent proper heat transfer. When the coil cannot absorb heat, the air coming from the vents may feel warm.
Common causes of frozen coils include:
- Low refrigerant levels
- Restricted airflow
- Dirty filters
- Blocked return vents
- Ductwork problems
If your system runs but fails to cool your home, the coil may need attention. Addressing the cause early can help restore normal operation.
Uneven Cooling and Hot Spots
Uneven cooling is another sign of a struggling system. Some rooms may feel comfortable, while others stay warm. Different room temperatures often point to airflow problems or duct issues.
Leaky or poorly balanced ducts can prevent cool air from reaching certain areas. When this happens, your AC may run longer to try to compensate. That extra runtime can increase strain on the system.
Poor distribution of airflow can also create hot spots. Over time, these imbalances can lead to constant operation. Fixing airflow issues early helps prevent ongoing wear.
If your home has noticeable temperature differences, your system may need adjustment. Ignoring the issue can lead to more frequent repairs.
Unusual Noises During Operation
Unusual noises often point to mechanical problems. A steady hum is normal, but loud or sharp sounds are not. These sounds may appear before the system begins running constantly.
Common warning sounds include:
- Squealing from moving parts
- Grinding metal sounds
- Clicking near the outdoor unit
- Thumping during startup
These noises can signal worn or damaged components. When parts struggle to operate, the system may run longer than normal. Addressing these issues early can help prevent larger failures.
When To Call for Professional Service
If your AC runs constantly, a professional inspection can help identify the cause. A technician can check airflow, coils, and overall system performance. Early diagnosis often prevents more serious damage.
Annual AC maintenance can reduce the risk of these problems. Maintenance helps keep airflow clear and components clean. A well-maintained system is less likely to run nonstop.
If your system already struggles, you may need AC repair. Repairs can restore normal operation and reduce strain on the system. A service visit can also help confirm whether the problem involves one part or several issues working together.
At Fire 'n' Ice Heating & Cooling Inc., we help homeowners in Downers Grove keep their AC systems running properly. Contact Fire 'n' Ice Heating & Cooling Inc. to schedule an inspection and restore reliable cooling.
5240 Thatcher Rd.