How to Know If Your AC’s Refrigerant Level Is Low

Have you ever wondered why your room is not as cold as it used to be, even when the AC is turned on? Or why your electricity bill has been higher lately despite using the same settings and hours? Those could be signs that your refrigerant is running low, and it could be due to improper installation or a leak in your system. Either of the two could lead to serious problems. 

That is why this article will tell you what you need to watch out for to immediately spot if the refrigerant level is your unit’s problem. By identifying the problem early on, you can resolve the issue before it gets expensive. 

Signs That Your AC’s Refrigerant Level Is Low

#1: You Feel Warm Air Coming Out of the AC

The refrigerant is responsible for producing cool air for your home. You find it inside the copper coils of the AC and it absorbs the heat that comes from indoor air. Once it absorbs the heat, it can help transform it into cold air and distribute it around the house. 

When your AC unit is low in refrigerant, the heat gets trapped inside. As a result, the system cannot keep up, and only warm air gets out. 

#2: You See Ice In Your Refrigerant Line

Another obvious sign is when you see ice forming in the refrigerant line. It happens because the evaporator coil turns cold when running low in the refrigerant to the point that it starts to freeze. Then, liquid refrigerant starts to flow through this line but turns into ice because of the freezing temperature. Sometimes, the ice would also appear on the surrounding components of the coil.

#3: You Hear a Bubbling or Hissing Sound Coming From It

Another obvious sign is hearing a hissing sound coming from your coils. The sound occurs when the refrigerant travels inside the coil and gets through the holes or cracks. The pressure produces the hissing you hear. 

#4: The Room Becomes More Humid

Aside from warm air, you might observe the humidity level inside the room increasing. The AC converts warm air into cool air and removes the moisture inside the room to make it cool and comfortable. A refrigerant drop would prevent your system from dehumidifying the room. Your room would end up with higher humidity levels, forcing the AC unit to work harder. 

#5: Increase in Energy Cost

Because of these deficiencies, the AC unit would have difficulty performing its functions. For this reason, it would take your unit a much longer time than it usually does to make the room cooler. That could lead to higher energy consumption and higher power bills. 


If you suspect that something is wrong with your air conditioning unit, and you are quite positive that it is related to a low level of refrigerants, call your trusted HVAC specialist to troubleshoot your unit. They can fix the leaks and refill the unit’s refrigerant, but they should conduct an inspection first to know what your system needs. 

For your air conditioner services in Indiana, Good Guys Home Services is where you can find trustworthy and experienced technicians. We fix, maintain, and replace air conditioners and furnaces. Book online or through our app, and we will help bring back your peace of mind. 


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