Sometimes, the ac is running, but it is not cooling the house. It might be a minor issue that you can handle, or it can also be an issue that would need you to call in an expert. So, we ask ourselves, why is my air conditioner not cooling the house? 

First, it is a common problem when the residential HVAC system has issues. It could be anything, including being dirty or breaking down. So what are these possible issues, and can we fix them? These are the most important questions after noticing that the AC is running but not cooling the house. Several issues can cause this. This article will focus on the problems that cause an air conditioner to stop cooling the home.

Related: Why is my AC not turning off?

Why Is My Air Conditioner Not Cooling the House? Possible Reasons.

Several issues can cause a central air conditioner to stop cooling a home. We have mentioned that they can easily be fixed by troubleshooting while others strictly need pros to get them fixed. But what are these problems specifically? Let’s try to look at each of them:

Dirty Air Filter 

When there is much contamination in the filtration system, the air that passes through is insufficient to cool the entire house. The contamination may have been caused by the house being a little too dusty or smoky. This problem is complicated to fix. It’s not easy to clean the filter. So the moment you notice that the filter is dirty, replace it. If it was the problem, the AC should work as soon as you insert the new air filter. If not, there must be another issue. 

The Thermostat is On 

We need to adjust the thermostat to Auto for normal functioning, where the air blows from the vent only when the fan is cooling. When the thermostat switch is in the On position, the fan keeps running, which causes the warm air to flow from the vent without being cooled. 

The Circuit Breakers are Off 

The whole system usually carries two circuit breakers that guard it against an electrical malfunction. In case of any, the circuit breaker trips to cut off the power supply. Now, one of those two might have tripped. For example, the one for the outdoor unit trips, the indoor unit will keep blowing warm air in the house since it would be the only one functioning. You need to check the circuit breakers. Try switching them on if any of them has tripped. If it ceases again after some time, it means that the problem is way bigger than it, and so we would need to call in a professional to check and fix it. 

A Dirty Condenser 

Suppose debris covers the condenser (or any of its parts), which obstructs airflow. In that case, it will be challenging for the outdoor unit/condenser to perform. In this case, instead of blowing cold air, the system will blow warm air into the house. It would help if you did this by cleaning it with a garden hose and some steam. Be careful, though, with the amount of moisture you let in since it can damage the delicate fins. Suppose there is no change and everything else is all right. In that case, it means that the condenser has a bigger problem, and a professional needs to look into it. 

Leaking Refrigerant

This issue strictly needs to be fixed with an AC technician only. Refrigerant is a delicate and crucial part of the cooling system. If not carefully handled, it can be harmful.

Suppose you hear a hissing sound or bubbling sound coming from the AC unit. In that case, there is most likely a significant leak that requires urgent attention. The refrigerant is the pill that circulates in a loop-like fashion to cool the passing air. If it’s not intact, there will be no cooling though the fan will blow warm air into the house. 

Leaking Ductwork

Leaking ductwork reduces power and minimizes cooling efficiency. It is challenging to detect leakage in the ducts. Often, the first thing we notice is higher energy bills and inefficient cooling. If you suspect a duct leak, call a professional technician. 

Final Word: Why Is My Air Conditioner Not Cooling the House?

AC cooling systems are usually very complicated and massive. It might take time to notice issues that might be leading to cooling inefficiencies or even a shorter lifespan. Suppose you’re wondering why your air conditioner is not adequately cooling your home. In that case, you may require the services of a professional technician to inspect the entire cooling system thoroughly.