Fortunately, not every cooling problem requires an emergency repair. Some issues have simple solutions that homeowners can safely check before calling an HVAC professional.
If your air conditioner isn't keeping your home cool, here are nine things to look at before scheduling a service appointment.
The 9-Point Checklist
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Check Your Thermostat Settings
It may sound obvious, but thermostat settings are one of the most common reasons homeowners think their air conditioner has stopped working.
Make sure the thermostat is set to Cool instead of Heat or Fan Only. Double-check that the temperature is set several degrees lower than the current room temperature.
If your thermostat uses batteries, replacing them may also solve the problem. Sometimes a simple setting adjustment is all it takes to get your system cooling again.
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Replace a Dirty Air Filter
A clogged air filter restricts airflow throughout your HVAC system.
When airflow becomes limited, your air conditioner has to work much harder to cool your home. Over time, this can reduce efficiency, increase energy costs, and even cause the evaporator coil to freeze.
If you can't remember the last time you replaced your air filter, it's a good place to start. Most filters should be changed every one to three months depending on usage, pets, and indoor air quality.
A clean filter allows your system to move air more efficiently and helps improve overall performance.
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Inspect Your Outdoor Condenser Unit
Your outdoor air conditioning unit needs adequate airflow to release heat from your home.
Leaves, grass clippings, weeds, dirt, and other debris can collect around the condenser and reduce its efficiency.
Take a quick look outside and make sure the unit has at least two feet of open space on all sides. Gently remove any debris that may be blocking airflow.
Keeping the outdoor unit clean can improve cooling performance and extend the life of your system.
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Make Sure Your Circuit Breaker Hasn't Tripped
Sometimes the outdoor condenser loses power while the indoor blower continues running.
When this happens, you'll feel air coming from the vents, but it won't be cool. Check your home's electrical panel to see if the breaker for your air conditioning system has tripped. If it has, reset it once.
If the breaker trips again, don't continue resetting it. This could indicate an electrical issue that requires professional diagnosis. -
Look for Frozen Evaporator Coils
If your air conditioner has poor airflow or blows warm air, frozen evaporator coils may be the cause.
Ice forms when airflow becomes restricted or refrigerant levels are low.
If you notice ice on the indoor unit or refrigerant lines, turn off the air conditioner and allow the system to thaw completely before restarting it. Continuing to operate the system while frozen can cause additional damage.
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Check That Your Vents Are Open
It's surprisingly common for furniture, rugs, or closed vents to restrict airflow inside the home.
Walk through each room and make sure supply vents are fully open and not blocked by couches, curtains, or other household items.
Proper airflow helps your air conditioner cool every room more efficiently.
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Low Refrigerant Levels
Refrigerant is essential for removing heat from your home.
If your system is low on refrigerant, it may struggle to cool properly or blow warm air altogether.
Unlike fuel, refrigerant isn't something your air conditioner uses up over time. Low refrigerant almost always indicates a leak somewhere in the system.
Because refrigerant requires specialized equipment and licensing to handle safely, this is not a DIY repair. -
Your Air Conditioner May Be Too Old
Most central air conditioning systems last between 12 and 15 years with proper maintenance.
As equipment ages, efficiency gradually declines and repairs become more frequent.
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It's Time for Professional Maintenance
If you've checked the obvious causes and your home still isn't cooling properly, it's time to schedule an inspection.
Professional maintenance includes checking refrigerant levels, inspecting electrical components, cleaning coils, testing airflow, and identifying worn parts before they fail completely.
Many expensive repairs can be prevented through routine annual maintenance. Keeping your system serviced also helps improve energy efficiency and extends its lifespan.
How to Keep Your Air Conditioner Running Efficiently
The best way to avoid unexpected breakdowns is through regular maintenance. Replacing air filters on schedule, keeping the outdoor unit clean, and having your system professionally inspected each year can significantly improve reliability.
If your AC is nearing the end of its lifespan and no longer keeps your home comfortable, replacing the system may be more cost-effective than continuing to invest in repairs. A professional inspection can help determine which option makes the most financial sense.
Routine maintenance also helps lower energy bills by allowing your air conditioner to operate as efficiently as possible throughout the summer.
Waiting until your AC stops working often leads to more expensive repairs than addressing small issues early.
Why Homeowners Trust FixAll Plumbing, Heating & Air
At FixAll Plumbing, Heating & Air, we understand how important reliable air conditioning is during New Jersey's hottest months.
Our experienced HVAC technicians carefully inspect every system to identify the true cause of cooling problems rather than simply treating the symptoms.
Whether your air conditioner needs routine maintenance, a repair, or a complete replacement, we'll provide honest recommendations and quality workmanship you can count on.
We're proud to help homeowners throughout Monmouth County and surrounding communities stay comfortable all year long.
Frequently Asked Questions
Why is my AC running but not cooling?
This can be caused by a dirty air filter, frozen evaporator coils, low refrigerant, thermostat issues, or problems with the outdoor condenser unit.
How often should I replace my AC filter?
Most homeowners should replace their air filter every one to three months. Homes with pets or allergy sufferers may need more frequent replacements.
Can I add refrigerant myself?
No. Refrigerant should only be handled by licensed HVAC professionals. Low refrigerant usually indicates a leak that should be repaired before the system is recharged.
How often should my air conditioner be serviced?
Most HVAC manufacturers recommend professional maintenance once a year, ideally before the cooling season begins.
Schedule Your AC Inspection Today
If your air conditioner isn't keeping your home comfortable, don't wait for the problem to get worse. The experienced team at FixAll Plumbing, Heating & Air provides professional AC inspections, repairs, maintenance, and system replacements for homeowners throughout Monmouth County and nearby New Jersey communities.