My Thermostat Is Set Low. Why Is My Air Conditioner Blowing Warm Air?

When you come home at the end of the day, you’re likely seeking refuge from the oppressive heat and sweltering Florida humidity.

Heaving a sigh and changing into more comfortable clothes than the ones you had worn to work, you likely have no desire to remain a sticky, sweaty mess in the comfort of your own home.

You tick down the temperature on your thermostat, waiting expectedly for the blessedly cooler air to reach you. But it never comes. Instead, it just continues to blow warm air — which is the last thing you need on this particular day.

Sound familiar? If you’re struggling with this particular problem, you might find that the source of your predicament is … 

  1. A Dirty Evaporator Coil

    The presence of warm air is actually crucial to the function of your evaporator coils. This coil is a piece of equipment that absorbs warmth and moisture from the surrounding air, thereby allowing your system to return colder air. But when it is dirty or clogged with dust and allergens, it can’t absorb anything, thus impeding your system’s ability to cool down.

  2. A Dirty Air Filter

    Before the warm, moist air reaches your evaporator coil, it needs to pass through your air filter. But if your filter is dirty or clogged, it restricts airflow and ultimately blocks the air from reaching the coils. And when the coils cannot function properly, your home will remain warm.

  3. A Leaky Duct System

    Another source of blocked airflow could be your ductwork. If there are holes, cracks, or other variations of disconnection in a duct, then your unit is not receiving the return air it needs to cool your home.The cooled air may also be spilling instead into walls or crawl spaces rather than the main rooms themselves.

  4. A Loss of Power To Your Outdoor Unit

    Most HVAC systems feature both an indoor and outdoor unit. The outdoor condenser unit is the one that removes heat before spinning it back indoors to you. However, if the outdoor condenser unit loses power or experiences an electrical complication/outage, your indoor unit will also suffer.

  5. A Refrigerant Leak

    Refrigerant is a cooling liquid that flows in a loop in your HVAC system and helps to expedite the cooling process by also absorbing heat as it makes its rounds. You should almost never, however, have to replace this liquid unless there’s a leak. And when this fluid leaks, it will both impair your air conditioning’s ability to cool the air and pose a serious health threat.

If you’re experiencing an electrical issue or refrigerant leak, be wary of handling these matters on your own — as they are hazardous to your safety, you should always contact a professional to help you fix the problem at hand.

And Bold City Heating and Air is here to help you diagnose, repair, and maintain your system! Ensuring that you are both safe and comfortable in your home is our priority, and we want you to experience the bold difference that comes with having locally based and trusted professionals take care of your system. Call us today at (904) 379-1648 to schedule your appointment today!