The last thing anyone wants on a hot, summer day is to feel warm air blowing through their vents. Having an air conditioner that’s not cooling requires a bit of troubleshooting. In some cases, such as when a thermostat is set to “On” instead of “Auto,” homeowners can resolve the issue themselves. However, when basic fixes aren’t working, it’s time to call in the professionals.
Let’s take a look at some of the most common reasons why an air conditioner might not be cooling, and learn how an HVAC technician can troubleshoot the situation.
Why Is My Air Conditioner Blowing Warm Air?
An air conditioner that’s blowing warm or hot air can be caused by a variety of things. If your air conditioner is not functioning like it should, it’s always a good idea to call an expert HVAC technician for advice.
Thermostat Set to “On”
An air conditioner that sometimes blows out warm air, and other times blows out cold air, is probably set to “On” instead of “Auto.” When a thermostat is set to “On,” the fan runs 24/7, even when the air that’s coming out isn’t being cooled. The good news is this is an easy fix, and one that every homeowner can diagnose himself.
Dirty Air Filters
Could dirty air filters be the reason your air conditioner is not cooling properly? Air filters that are filled with dust and other debris block the air from flowing into the HVAC unit, causing the air conditioner to struggle as it works to circulate cool air. Dirty air filters can also make evaporator coils freeze, which causes the home to get very little cold air. Once again, this is an easy fix. Changing dirty air filters is a project that most homeowners can handle on their own.
Broken Condenser Fan Motor
Now we’re getting into the issues that are a little more challenging for homeowners to fix on their own. If the fan motor on an HVAC has gone out, then the system’s fan won’t dissipate heat and the air conditioner won’t be able to cool the home. A broken condenser fan will need to be repaired or replaced by an HVAC technician.
A compressor is the pump that cycles the refrigerant between the HVAC system’s evaporator and the condenser. When a compressor is broken, the refrigerant doesn’t circulate and homes can quickly become uncomfortably warm. Broken compressors can sometimes be fixed by an experienced HVAC technician, but more often than not, the entire outside unit will need to be replaced.
Refrigerant leaks are fairly common, but like broken condenser fan motors, this is an issue that needs to be dealt with by a licensed professional. Running an air conditioner with an ongoing leak can actually damage the HVAC system in a way that can’t be repaired. If you hear bubbling or hissing noises, if you see ice buildup on the refrigerant line, or if your air conditioner is not cooling your home properly, always call in an HVAC technician for help.
Get Prepared for Summer with Air Technical Services
Don’t wait until the hottest day of the year to fix an air conditioner that’s not working properly. If you suspect that your air conditioner is not cooling the way it used to, or if the air blowing from your vents feels lukewarm, give Air Technical Services a call right away at 609-494-1400.