Top Reasons Your Air Conditioner Is Not Working


Are you finding it hard to maintain comfortable temperatures in your home because of a stubborn air conditioner that won’t do its job? No system is more important than your air conditioner when it comes to keeping your home cool. It’s the only thing standing between you and unbearable heat. When your AC doesn’t work efficiently, here are some of the possible reasons why.

Reasons Your Air Conditioner Is Not Working (Image Credit: Pexels)

Your Unit Is Dirty

It may seem obvious, but the biggest reason an AC won’t work is that it’s full of dirt. The accumulation of dirt in your vents can cause your system to shut down or run less efficiently. For this reason, it’s important to clean out your AC unit a few times a year.

Additionally, change the filters regularly. Even when a dirty unit is functioning, it spreads dust particles and harmful emissions into your home. Schedule an AC repair service as soon as you realize you are having issues.

Your Unit Is Blocked

Your AC unit sits outside of your home and blows conditioned air throughout the house through a series of ducts. When furniture, insulation, and other objects obstruct the vents, it limits the airflow and makes your unit work harder to distribute air. The result is noisy operation and inefficiency, which will lead to higher electric bills. Regularly check the vents, especially those inside the home.

Your Unit Is Too Small for Your Home

If your unit is too small for your house, it will constantly run and not cool your home adequately. In this case, you should consider getting a larger appliance or having multiple units installed in your home. To know whether you need a bigger system or more units, calculate the square footage of your home and then compare that number to the BTUs listed on your AC.

You Have the Wrong Thermostat Settings

For your system to function correctly, you need to know how to operate it. Different models have different features, and each has its own controls. If you don’t know what each one does, you will not get the best performance from your system. Take time to learn how to use your thermostat so you can program it for maximum efficiency. Another reason your thermostat may not be working is because of dead batteries, so change them at least once a year.

Low Refrigerant

If the coils in your unit are dirty, the refrigerant may become blocked. However, there is also a chance you might be low on refrigerant. This can happen if there are leaks in your system. If you suspect leaks, contact your HVAC technician for an inspection.

Your Unit Is Old

AC Units don’t last forever. If your AC is more than 10 years old and isn’t functioning well, it’s time for a replacement. To save money on your electric bills and feel more comfortable in your home, consider replacing it with a modern star-rated one.

Leaking Ducts

Leaking ducts can also render your AC inefficient. It leads to uneven cooling or low airflow in some vents. If you notice a leak, seal it to reduce energy loss.

Dirty Outdoor Coils

Over time, the coil outside your house can accumulate dirt and debris. When contaminants block the airflow, the unit struggles to cool your home. A leak or low refrigerant usually accompanies this problem. If you notice a problem with your coil, contact an HVAC technician to inspect and repair it.

The Fans Have Problems

When the fans stop blowing or pull in less air, your AC unit will struggle to cool your home. A faulty motor, worn-out belts, a lack of lubrication, or bad bearings are possible issues. If you notice a problem with your fan, call an HVAC technician immediately to prevent further damage.

Schedule Tune-Ups

To keep your AC in good health, schedule a tune-up at least once a year. A qualified technician will inspect your unit, replace the filters, and clean or repair any damaged parts. Tune-ups can help increase efficiency and prevent breakdowns. You’ll also lower energy bills and prolong your system’s lifespan overall.