Summer has begun to intensify. While roasting and pool parties are a great way to enjoy the summer season, we all rely on the comfort of our own homes to provide the much-needed warmth in the heat. That’s where we count our air conditioners the most. This is also the busiest season for HVAC professionals. We receive calls regarding ACs blowing warm air every single day in the summer. Fortunately, a common HVAC malfunction can sometimes be resolved by a homeowner. If you’ve been wondering, “Why is my air conditioner blowing warm air?” Service professionals want to help. If, however, you end up not being able to identify or fix it on your own, contact Service Service for all your needs and weather queries.
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How To Deal With Air Conditioner Blowing Warm Air Thermostat
It may sound obvious, but the first thing you should check is the thermostat. If your AC blows hot air, the thermostat may be accidentally set to “heat up.” If so, it is easy to fix it yourself. Just easily turn on the thermostat setting after it “cools down” and see if the air conditioner starts to breathe fresh air again.
Additionally, you want to make sure the batteries are working and that the temperature is not set too high. Remember, the “automatic” function uses a fan only when the air is heated or cooled. The “open” function means that the fan will operate 24/7 to circulate air, even when the AC or heater is turned off. We recommend using the “default” function most of the time and switching to “only” when needed.
Adjustment: Check the thermostat and make sure it is set to “cool” and the correct temperature. If it needs new batteries, replace them. During cooling, we recommend that you set the thermostat to 78 degrees Fahrenheit and 7-10 degrees above if you are not at home. If the turnaround time is 8 hours, you can save 10% on your annual heating and cooling costs (U.S. Department of Energy).
Circuit breaker
After checking the thermostat batteries and settings, make sure the HVAC system is powered by checking the power panel. HVAC units require a lot of power to operate. If there is a need for too much power, the circuit breaker may automatically shut off the power as a safety measure.
Repair: Find your electrical panel and check for a hidden breaker or a blown fuse. To turn on the power back on the unit, flip the breaker off completely (the opposite of all other shortcuts), and turn it on to the “in” position. If you have a blown fuse, you will need to replace it. This may also be a good time to label all your regions for easy use in the future when there is a very full circuit.
If your breaker keeps going for no reason, you will need to consult an HVAC technician or electrician.
Evaporator coils and air filter
Although air filters have nothing to do with air temperature, a polluted air filter can lead to contaminated evaporator coils. When the evaporator coil closes with dust and debris, there may not be enough airflow to allow proper cooling. A polluted air filter creates a buildup of debris that can lead to frozen evaporator coils. You may think that “snow” is equivalent to cool air, but ice coils block the flow of cool air, which can lead to warm airflow from a running engine instead.
Air filter replacement should be completed by the owner every 30-60 days, depending on weather, filter type, and housing. We recommend setting a monthly reminder to check the status of your air filter at the beginning of each month. If the light passes a little through the filter when you lift it to the light, you should replace it with a new one.
Repair: If your evaporator coil is frozen, turn off the unit and replace the air filter. Wait until the unit melts before opening it again. If the coils freeze again, turn off the unit and immediately call an HVAC specialist to resolve the issue. You may have a refrigerator leak or a problem with the compressor – you will need professional help.
Condenser Coils (External Unit)
If you have checked the thermostat, breaker box, air filter, and indoor coils, it is time to go outside to check the outdoor unit. Just as indoor evaporator coils require free airflow, so do outdoor evaporator coils. This is why it is recommended that you maintain at least a 2-foot clearance near the outdoor condenser unit at all times.
Repair: If your outdoor unit is closed, turn off the unit at the source. Then, remove large objects by hand with gloves and clean small debris with your garden hose. Learn step by step how to clean your outdoor condenser unit.
Remember to plan for air conditioning and cleaning at the beginning of each cooling period. Double-check that your HVAC company incorporates complete internal and external coil cleaning as part of its regular integration. In addition to professional cleaning, it is a good idea to inspect the outdoor unit from time to time and clean it yourself if necessary.
Refrigerator
One of the main causes of a malfunctioning air conditioner is a low-temperature refrigerator. If you have a service valve that has worn out, loose joints, or misalignment, you may have a refrigerator that can be charged or overcharged.
Fix: Refrigerator (also known as coolant) is very dangerous. Unless you are a trained professional, you should not try to fix refrigerator problems yourself. The best way to prevent early refrigeration leaks is to plan an annual climate adjustment before the cooling season begins. If you see your AC blowing warm air, roaring/roaring sounds, or ice in your refrigerator line, do it immediately. The sooner you turn on the lower or overcharged refrigerator the better. Contact your local HVAC company as soon as possible.
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