Why is my AC blowing hot air?

Why Your AC is Blowing Hot Air in Your Dallas Home

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

Thermostat Setting

The simplest fix is the thermostat. Check it to make sure the thermostat is on the “cool” mode and adjusted far below room temperature. Also, check the thermostat’s wiring to ensure the wires are securely fastened to the terminals.

Condenser Coil

The condenser coil is placed in the outdoor unit of a split-system A/C. If the condenser is dirty, heat exchange can be blocked. Shut off power to the unit at the disconnect plug and spray the sides of the unit with a foaming coil cleaner, followed by spraying down with a garden hose. Continue to spray the entire unit until it is all clean.

Evaporator Coil

The evaporator coil is positioned on top of the furnace in an upflow system. You may need to remove a few panels to get to the evaporator. If there is ice accumulation on the evaporator, turn your A/C to “fan” mode or turn on the furnace to try melting the ice. Before doing so, check the air filter and change it if it’s clogged with dirt. Poor airflow across the evaporator can create this ice buildup. Also, use the foaming coil cleaner on the evaporator. If ice builds up again, call your technician.

There are other causes for ice buildup, like electrical problems or an incorrect refrigerant charge. Your HVAC tech must handle those issues.

Compressor Problems

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

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

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