Why Your AC is Blowing Hot Air in Your Dayton Home

Why Your AC is Blowing Hot Air in Your Dayton Home


When your A/C is blowing hot air into your Dayton home, you will want to find the cause so the situation can be resolved fast. Read on to discover the common problems that can cause the A/C to blow hot air and see if you can troubleshoot any issues or if it’s time to contact an HVAC professional.

Thermostat Setting

The quickest fix is the thermostat. Check that the thermostat is on the “cool” mode and adjusted well below room temperature then check the thermostat wiring to ensure the wires are securely fastened to the terminals.

Condenser Coil

The condenser coil is located in the outdoor unit of your split-system A/C. If the condenser gets dirty, heat exchange is blocked. Shut off the unit’s power at the disconnect plug, and then spray the sides of the unit with a foaming coil cleaner. Next, spray the unit with a garden hose and continue to spray the entire unit until it’s clean.

Evaporator Coil

The evaporator coil is placed on top of the furnace in an upflow system. You may need to remove panels to access the evaporator. If you see ice accumulation on the evaporator, turn the A/C to “fan” mode or turn the furnace on to help melt the ice. Before doing this though, check the air filter and change it if dirty. Poor airflow across the evaporator does create ice buildup. Also, try using the foaming coil cleaner on the evaporator. If ice returns, call your technician.

There are other reasons for ice buildup, such as an electrical problem or incorrect refrigerant charge. Your HVAC tech needs to handle these issues.

Compressor Problems

When you cleaned the condenser coil, you also cleaned your compressor, which helps prevent overheating. Please note that if you hear humming, grinding or rattling from the outdoor unit, turn off the A/C and call your HVAC technician.

To learn more about why your A/C is blowing hot air into your Dayton home, contact Airtron Heating & Air Conditioning.


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