The last thing you want in the sweltering Texas summer is to discover that your AC is blowing hot air. In today’s post we answer the question “Why is my AC blowing hot air?” and give you some tips to help you troubleshoot your unit.
Why Is My AC Blowing Hot Air?
There are several reasons why your AC blows hot air. Here are some of the most common, from the simplest to the most complex.
Your Thermostat Settings Are Wrong
If your AC starts blowing hot air when it should be cooling your home, the first thing to do is to look at your thermostat. If the settings are wrong, change them and the problem is solved! If the thermostat settings are correct, but your AC blows warm air, keep reading to go through other causes.
Your Filters Are Dirty
As we have mentioned in previous posts, dirty filters are one of the most common culprits of AC malfunctions — including causing your unit to blow warm air. If your AC starts blowing hot air, take a look at your filters and replace them if necessary. If your filters are clean, then the cause may be more complex, as we’ll see below.
Low Refrigerant Levels
Another common reason why your AC blows hot air is because your unit is low on refrigerant. Other giveaways of low refrigerant levels include ice on refrigerant lines, water leaks, and hissing noises coming from your unit. If you suspect this is the problem causing your AC to blow warm air, contact a professional to have your refrigerant levels topped off.
Frozen Evaporator Coil
Refrigerant issues, low airflow, or dirty condenser coils may cause evaporator coils to freeze. This, in turn, will cause your AC unit to blow hot air because the evaporator coil is the part of the system responsible for absorbing heat. If ice has formed on the evaporator coil of your system, turn off the unit and contact an HVAC professional.
Dirty Condenser Coils
As part of the outdoor unit of your system, the condenser coil is always exposed to the elements. Dirt, debris, and leaves may accumulate on the condenser coil, impairing its ability to expel heat from your house. Inspect your outside unit, and if it’s dirty, remember to always shut off the power before cleaning it. If your AC still blows warm air after cleaning the condenser coil, contact an HVAC technician to have your unit serviced.
Zero Heating AC and Refrigeration: the Best In San Antonio, TX
Whether you need to repair or replace your AC unit, or any of its many components, Zero Heating AC and refrigeration and Refrigeration is your best option in San Antonio, Texas.
Contact us today using our website, by telephone (210-900-0824), or through our social media accounts on Facebook and Twitter and to schedule a tune-up or to get a free estimate. We also offer financing plans for your convenience.