March 10


Understanding Why Your Air Conditioner Isn’t Cooling Your Home

Air conditioners are a fantastic invention and can be your best friend in the summer. However, if you have an air conditioning unit that is running but not cooling the house, it might be time for some troubleshooting. Here we discuss why your AC may not be working correctly and how to fix it!

Common Issues Homeowners Have With AC

Most homeowners encounter the following issues with their air conditioning unit:

  • The air conditioner unit is running but not cooling the house.
  • The air conditioner is getting warmer and warmer as you turn up the thermostat.
  • Damaged air conditioning filter
  • Mold growth on surfaces near vents
  • And more…

AC Running But Not Cooling: A Common Issue At Home

Most homeowners encounter this problem in the summer months. It is a very frustrating and uncomfortable situation when you feel like your house is hotter than outside. Many homeowners try to figure out why this happens so often, why they have to sweat all day when it seems their AC unit should be doing its job but isn’t it?

There are multiple reasons why an air conditioner runs without making the home cooler. Let these articles help you know more about the common reasons why your air conditioner isn’t cooling your homes.

1. You May Have Issues With Your Thermostat

When your air conditioner runs but not cools, there may be a problem with your thermostat. If the system does not sense a significant drop in temperature, it will continue to run and won’t shut off until it overheats or a safety mechanism is engaged. The most common reason why there is no change in temperature sensed by the air conditioner is that your home’s windows are closed. Your AC unit pulls heat from outside, but if you keep all of those cool breezes out, nothing comes back into your house for cooling purposes which means that cycle can’t begin again as needed to make changes inside room temp.

Another possible reason why the thermostat doesn’t receive any signal that tells it to stop running could be due to an obstruction lodged between the sensor eye and where it is supposed to sense the temperature. The sensor eye is located on top of your unit, and it’s usually covered by a plastic cover or dome, which can be removed easily for inspection.

2. Your Filters May Be Damaged

Damaged Filters can also cause an air conditioner to run but not cool the house. Poorly maintained or clogged filters can cause problems with your AC unit because they let through less outside air where there isn’t much, to begin with, and it prevents proper airflow, which causes overheating. If you have pets, their fur will collect all over your equipment, causing this problem as well, so be sure to keep them away from vents too.

3. Air Conditioning Fans Are Broken

Your air conditioner’s fan may also be the reason why your system is running but not cooling. The fan pushes air through the coils to remove heat and circulate it back into the room, which helps cool off your home. If there’s a problem with this part, you will experience issues like poor airflow or no airflow.

4. The AC’s Compressor Unit is Malfunctioning

The compressor unit of an AC works as its heart, so when something goes wrong here, things can get really difficult, especially during the summer months! This piece is responsible for compressing gas refrigerant that has been cooled by passing over evaporator coils, thereby making cold temperatures inside the house possible. When any kind of malfunction occurs in this component, it heats up excessively, causing overheating issues that prevent proper operation. So be sure to have this checked by a professional to find out why your air conditioner is running but not cooling.

5. Your AC System May Have A Broken Condenser Unit

A broken condenser unit can also be why your air conditioner is running but not cooling. The same problems that occur with the compressor can happen in this component, too, like overheating or no airflow, which causes an AC system to stop working properly and eventually fail over time if it isn’t repaired right away.

6. Your AC’s Coils Are Clogged

Clogged coils are also why your air conditioner is running but not cooling. The evaporator unit’s job is to pull heat from the house using a refrigerant that has been pressurized by a compressor then cooled off with condenser fan blades before being circulated back into the home, which makes room temperature possible.

When there’s a blockage in this component, it doesn’t allow proper airflow and creates problems like overheating or no airflow at all, leading to a broken AC system if left alone long enough.

7. You Have A Frozen Evaporator Coil

Your evaporator coils are the part of your AC system that absorbs heat from inside your home. This cools down the air, which is then sent out into each room in order to make it cooler for you to live in. If these coils are iced up or frozen over, they will not be able to do their job properly.

If this happens, you can usually determine why by checking on a few safety switches first. You may have an electrical switch called an overload protector installed near where the wires enter your house that shuts off power when too much electricity is being used at once. It’s possible that this has tripped and shut down your unit temporarily until someone flips it back again manually (it will turn back on automatically after about 20 minutes). Another safety switch you might have is a freeze sensor, which sounds an alarm when the temperature drops below freezing. This, too, will shut down your unit until someone manually shuts it back on again.

If these switches are not why your air conditioner isn’t working properly, then there may be a problem with the compressor itself that has caused it to stop running altogether.

8. Your Cooling Systems Have Leaking Refrigerants

Another reason why your air conditioner isn’t cooling the house is because of a leaking refrigerant. The compressor may also not be running if there’s an issue with gas pressure in the system. This could happen when dirt and debris work their way into the valves or other parts, which can damage it over time. Refrigerants are important because they are what keeps the pressure in your AC system. If it’s low, then you aren’t going to be getting any cool air at all since there isn’t enough power running through the lines.

9. Leaking Ductwork May Be Present

A ductwork leak can make your AC run constantly without any cooling effect. A leaking air conditioner will start to drain the refrigerant from the system, reducing its efficiency and raising energy costs. The best way to check for ductwork is by checking if there are cold spots on various walls of your house that you know have been affected by an uncomfortable draft in winter months.

10. Your AC System is Undersized

If your air conditioning unit is undersized, it will run more often and for longer periods in order to keep the house cool. This extra use can cause components in the compressor or fan motor to wear down prematurely. When this happens, you may find that not only does your air conditioner take much longer than normal to reach a comfortable temperature, but also, when it finally does get there, it doesn’t stay cool for very long.

One way to tell if you have an under-sized system is by looking at how many BTUs are required versus what size cooling capacity your HVAC service provider installed. For example: If your home requires 15000 BTU/hr and they install a 12500 BTU/hr system, then then it’s undersized by about 20%.

10. Your Air Conditioning System is Aging

Aging air conditioning systems can also lead to premature wear and tear. This is why it’s important to have your AC units professionally inspected every few years, as well as having the unit serviced annually by an HVAC service provider. By doing this, you will be able to catch small problems before they cause a bigger issue.

Is your AC still running but not cooling? Air Conditioners USA is here!

Most of the reasons for a running but not cooling AC needs professional help to ensure it is fixed correctly. If inexperienced, do not try to fix the air conditioner yourself. The dangers of making errors outweigh the cost of hiring an HVAC expert like us. Why risk electrocution or causing damage that will cost more than just having an AC repair company come out and take a look for you? Contact Air Conditioners USA today!

Air Conditioners USA is your trusted company for all your air conditioner repair needs! We provide a free estimate and great customer service. We understand why it is so hot when the AC isn’t working- so we always give our best to ensure all our customers are satisfied. Our technicians are the best in the business and have many years of experience. Our customers are satisfied with the affordable yet quality services our team can provide.

We guarantee your satisfaction, so why wait? Beat the heat today with our expert air conditioning technicians from Air Conditioners USA! Schedule an appointment with us and avail of our free estimate for your heating and cooling services today!


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