The Various Reasons Your Residential Air Conditioning System May Blow Warm Air


Having a correctly sized and well-maintained air conditioning system in your home is essential for beating the scorching heat of the summer months. Unfortunately, you may face problems with your AC system, even if you take good care of it.

One of the most dreadful problems you may experience is your air conditioner blowing lukewarm air. Keep reading to familiarize yourself with a few common culprits behind this issue.

Wrong/Hotter Temperature Setting

The first thing that you should do if you notice that your air conditioning unit is blowing lukewarm air is to check the AC's thermostat. The thermostat for your AC system is what regulates the temperature of the air that comes out of the cooling system. Setting a hotter temperature than is required for your area may result in reduced cooling performance.

To stay cool while keeping energy bills down, be sure to optimize your thermostat settings for the summer weather.

Low Refrigerant Level

Just like your car's AC system, your residential air conditioner uses refrigerant to absorb heat from your indoor environment and then dissipate it outside. While your home's air conditioning system isn't designed to run out of this working fluid, the presence of leaks in the system can cause the fluid level to drop below the minimum acceptable level.  

When this happens, your AC system will struggle to keep you cool and comfortable. The good news is that your AC equipment's refrigerant can be replenished. However, the leaks will need to be sealed first.

Dirty Air Filter

Another likely reason your air conditioning unit may not keep you cool is if you have a clogged air filter. Air filters are designed to filter the air that enters air conditioning systems, removing airborne contaminants in the process. Over time, the filters collect too much dirt and become clogged. This leads to restricted airflow within the cooling system, which can result in inadequate cooling performance.

If your AC system is blowing warm air due to a dirty air filter, you can fix the problem by simply replacing the filter with a new one. 

Broken Condenser Fan

Located in the outdoor unit of your two-part AC system, a faulty condenser fan will not do its job of blowing cold air over the condenser coils so that the hot gaseous refrigerant flowing through the coils can be cooled and converted into liquid, maintaining the cooling effect. An easy fix for a broken condenser fan is usually to remove and replace the broken part with a new one.

The secret to avoiding a complete AC breakdown and keeping AC repair bills at a minimum is to get problems diagnosed and repaired as soon as they arise. Regardless of the reason your AC equipment is not keeping you cool enough, you can always contact an AC repair contractor for help.


4 May 2021

Inspecting Your Air Ducts

Last summer, I began to get extremely hot in my home. My air conditioning system couldn’t adequately keep my home cool anymore. Therefore, I contacted an experienced HVAC contractor. This individual visited my home and thoroughly inspected my unit. If your air conditioner isn’t working like it once did, your air ducts may be clogged up. Thankfully, an expert HVAC contractor can determine if faulty air ducts are the cause of the hot temperatures inside your home. On this blog, you will discover how an HVAC contractor can properly inspect your air ducts. Stay cool and comfortable during the hot summer months!