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747 Ogden Avenue • Downers Grove, IL
Servicing our Customers Since 1923

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Why is Your AC Not Working?

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Why is Your AC Not Working?

Picture this: it’s the middle of summer, and your AC just stopped working. Chances are you’re already cranky, sweaty, and looking for help. The first question on your mind is: “Is it a simple or costly repair?”

Below is a list that might help you determine whether or not a serious repair is needed. Here are the top five reasons why your AC might not be working:

Low Refrigerant
Refrigerant is the chemical used in your air conditioner that travels through the coils to remove heat from your home. When there is an insufficient amount of refrigerant, your unit will not be able to properly remove the heat and cool down your house. You may think this is a quick fix: just add more refrigerant. However, the low refrigerant is usually caused by a leak(s). An HVAC technician will need to inspect the unit for leaks and repair accordingly.

Dirty or Frozen Coils
Your system has two sets of coils: evaporator and condenser coils. The evaporator coil acts as a sponge to absorb the heat indoors. When something goes wrong with the air circulating around the evaporator coil and it becomes too cold, a layer of ice can form around it and freeze the coil. The result of this is either no air or warm air coming from the unit.

The condenser coil is part of the outdoor unit and takes the absorbed heat and pushes it outside of the home. The most common problem with this coil is a buildup of dirt. As the layer of dirt or debris builds up, it becomes increasingly harder to transfer heat. The unit’s efficiency decreases, and it makes the air blown out of the unit warm instead of cool.

Already recognize the problem with your AC unit? Call Stephens today!

Problems with the Fan
Dirt and debris can also build up on the outdoor fan. Whether it is a layer of dirt, a defective motor, or the belt has worn out, a problem with the fan can cause improper heat transfer. This will result in warm air, overheating, or even damage to the compressor.

The Dreaded Compressor
Speaking of the compressor… this is the one part of the unit you don’t want to break. It is the most important part of the unit, and it is also the most costly. The compressor initiates the cooling cycle, and if it malfunctions or goes bad, the air conditioning will not cool. It is at this point that you may want to look at the pros and cons of repairing versus replacing the unit.

Thermostat Issues
The thermostat is the part of the unit that signals the air conditioning to come on. If this is defective, damaged, or broken, it may cause the air to not come on at all. It is important to check the settings on the thermostat, as well. If it is set to “on,” you may want to think about turning it to “auto.” In the “on” setting, your unit will run constantly and blow air even when not cooling. In the “auto” setting, your unit will only turn on when needing to cool to the desired temperature.

Need additional assistance with an AC issue or evaluation? Call the experts at Stephens Plumbing and Heating today!