However, when they malfunction, it not only results in uncomfortably but may also pose health dangers to you, your family, and any pets you may keep inside the house.

The common problem we hear about nowadays is that the air conditioners are not blowing cold air but running, and the AC fan keeps running when turned off. This problem may arise due to power issues, thermostat issues, clogged filters, low refrigerant levels, etc.

So, if you realize that you have caused the problem, you must act instantly. Some are easy and may be resolved with DIY methods, while others need professional help.

In this article, we will answer why my brand new air conditioners are not cooling but running and how to fix them.

What Causes Air Conditioners Not Blowing Cold Air But Running?

What Causes Air Conditioner Not Blowing Cold Air But Running

Below is a list of causes that trigger air conditioners not to blow cold air but run:

Power Issues

It may seem obvious, but if your air conditioner isn't blowing, ensure it's plugged in properly and the power wire is still attached. If the outlet and cord are working properly, your electrical panel can be a problem.

Your air conditioner may have broken a fuse or damaged a breaker since air conditioners require huge power surges. Many models come with built-in overload switches; remember to examine this.

Issues With Thermostat

The thermostat on your air conditioner may not be adjusted to the proper temperature if everything appears in order on the power front. However, the air conditioner is still not delivering chilly air. Make sure the setting is "cool."

If it is cool, examine the temperature setting to ensure that someone hasn't altered it. Reset it to cooling mode if it is currently set to heat, constant fan, or off. Wait a little bit after the system turns on, then examine the registers for the presence of cold air. The issue is resolved if it's cold! If it doesn't, you have to change the batteries.

Dirty Condenser

A dirty condenser unit can occasionally be why an AC isn't blowing cold air. The condenser unit, which is generally outside, is subjected to dust, leaves, twigs, tree branches, and all kinds of weather.

Keeping the condenser and its surroundings clean can help it receive air more easily, and it may prevent the system from overheating. It is best to leave the cleaning of a condenser unit to an HVAC specialist because it uses high-voltage power and carries dangerous chemicals.

Dirty Air Filters

Blocked and dust-filled air filters cause poor air circulation in and around your air conditioner. Dust can develop on the filter, like in clogged vents, which can accumulate debris that prevents airflow through your air conditioning unit. There is a chance that the air conditioner will freeze, develop a problem, or stop producing cool air entirely.

Refrigerant Leak

Refrigerant is required to keep an air conditioner functioning properly. Your air conditioner's ability to produce cold air is greatly aided by refrigerant lines, which cool the home temperature air. When the refrigerant pipelines leak, the air conditioner cannot effectively cool the air, and as a result, heated air emerges from the device.

What To Do If AC Malfunction?

What To Do If AC Malfunction

Here are some tips to fix a malfunctioning AC:

Cleaning Air Filters And Condenser Units

You are probably aware that you can clean soiled air filters at home with merely some soap and water, although you can even do this to the outdoor unit's condenser coils.

Clean off the grime and dust accumulation using a brush, then rinse it with water. Be careful to disconnect your air conditioner while attempting this.

Replace Thermostat Batteries

Cleaning And Servicing Ac Regularly

It doesn't matter what type of AC you use, central AC, window AC, or mini split AC; it will benefit significantly from regular cleaning and servicing. It is suggested to examine AC after four months.

A qualified HVAC technician must only handle problems with the air conditioner's internal components.

Hire A Professional

Seek an HVAC specialist to determine whether the issue is the fan motor, evaporator coils, or any other interior component of the air conditioner. If you're unsure of the exact cause of the problem with your machine, they can identify it and fix it. Never try to remedy the issue yourself, as it could cause more harm to the appliance or personal injury.


Is it safe to pour water on your air conditioner while operating?

The great news is that there won't be any adverse effects if you dump water on the air conditioner to clean it. It will operate more effectively if you spray water on the condenser. For the condenser to continue working well, it needs to be spritzed regularly.

Should I shut off my air conditioner if it isn't cooling?

Thus, if your air conditioner isn't chilling, and you detect a refrigerant leak, or if you have examined the air filter and thermostat but to no surprise, you should definitely turn off your air conditioner and contact a skilled technician immediately to diagnose the issues.

What is the price of replacing an AC coil?

The cost to replace an AC's evaporator or condenser coil may run from $800 to $2,400 on average, based on the type, your location, and other criteria. Although the part is not pricey, labor accounts for $500 to $1,000 of the entire cost.

Which is safer for the drain line of AC: bleach or vinegar?

Because vinegar inhibits corrosion and bleach can erode copper pipes in the drain line of your air conditioner, we recommend using vinegar instead of a bleach solution. Additionally, whereas bleach might harm your clothing or carpet, vinegar only leaves an odor after it has been spilled.


As you can see, there are many reasons why your air conditioner may not be blowing cold air, and these operational problems can pay you in terms of comfort and performance. Even though you can fix most minor issues, it is best to handle them with a skilled technician.

Hopefully, this article will help you if you are facing this problem. If you think there is anything left behind, feel free to ask them in the comments.

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