Why Isn't My AC Blowing Out Cold Air?

July 18, 2023

Air conditioning systems play a big role in helping you stay comfortable when temperatures skyrocket. But what happens when your AC begins to blow out warm air instead of the chilled breeze you've come to expect? This can be a particularly frustrating situation during the sweltering summer months. Learning about this problem is key to taking care of these issues as soon as possible.

Here are common reasons why your air conditioner might not be blowing cold air.

Thermostat Issues

An often overlooked but common reason for an AC not blowing cold air is an incorrectly set or malfunctioning thermostat. Ensure that your thermostat is set to "cool" and double-check to see if the temperature is lower than the current room temperature. If this doesn't solve the issue, it may be time to replace the batteries or check whether the thermostat needs replacement or professional repair.

Dirty Air Filter

Air filters play a key role in your AC's operation. They filter out dust, pollen, and other airborne particles, ensuring you breathe clean, fresh air. Over time, these filters can become clogged, restricting the flow of air and causing the system to struggle to maintain the desired temperature. As a rule of thumb, most air filters should be replaced every 1-3 months.

Low Refrigerant Levels

Refrigerant is the lifeblood of your air conditioning system, as it absorbs heat from the indoor air and releases it outside, thus cooling your home. If your AC isn't blowing cold air, it may be due to a low refrigerant level, which could be the result of a leak or undercharging. If you suspect this might be the problem, it's best to call a professional because handling refrigerant requires special training and equipment.

Incorrect AC Size

Believe it or not, size matters when it comes to air conditioning. If your AC unit is too small for the area it is supposed to cool, it may struggle to maintain a consistent temperature, leading to it blowing warm air. On the other hand, an AC unit that's too large can cool the area quickly, but it may not effectively reduce humidity, leaving the room feeling damp and lukewarm. Always consult with a professional when determining the correct size of AC unit for your space.

Duct Leaks

Your ductwork is the system of passages that distributes cold air throughout your home. If there are leaks or holes in the ductwork, that precious cool air might be escaping into your attic, basement, or inside the walls, instead of reaching your living spaces. Not only does this result in your AC not blowing cold air, but it can also cause your energy bills to increase. Regular duct inspections by professionals are key to identifying and repairing leaks.

Dirty Condenser Coils

The condenser coils can be found in the outdoor unit of your AC, as they are responsible for dispersing heat collected from your home to the outside. Whenever these coils become dirty or obstructed by debris, the system's efficiency is compromised, often resulting in warm air. Regular cleaning of the outdoor unit by HVAC professionals can help prevent this issue.

Faulty or Aging Components

Air conditioning units, like any other appliances, have a finite lifespan and can succumb to wear and tear. A failing compressor, a faulty fan motor, or a malfunctioning capacitor can all result in your AC not blowing cold air. If you have an older unit or if regular maintenance hasn't been carried out, these parts might need repair or replacement.

Insufficient Maintenance

Regular maintenance is crucial for any AC system. An annual professional tune-up can help catch potential issues before they become significant problems. Not only does regular maintenance keep your AC running at its best, but it also prolongs its lifespan and reduces energy consumption.

Final Thoughts

If your AC isn't blowing cold air, the first thing to do is to perform some simple checks - is your thermostat set correctly? Is your air filter clean? If these checks don't solve the issue, it's time to call a professional. They can accurately diagnose the problem, whether it's a low refrigerant level, dirty condenser coils, or a failing component.

Bob Boldt HVAC provides heating and cooling services for customers in Eagan and the surrounding areas. Delivering the best HVAC services at an affordable rate is always a priority. We also specialize in system add-ons and indoor air quality services. Feel free to give Bob Boldt HVAC a call to learn more about our services.

Contact Bob Boldt HVAC Today!

Contact Form

(833) 758-6461
Bob Boldt HVAC logo

Copyright © Bob Boldt HVAC. All Rights Reserved. License: #MB739673.