With the summer warmup here, you’ll want to make sure you can cool down comfortably in your home. So, if you notice that your system is blowing warm air instead of cool air, you could have a problem on your hands. To help identify the problem, we’re going to point out a few possible reasons why your system is blowing warm air.
Check the thermostat
Checking your thermostat sounds basic. However, if you notice warm air is circulating the house when you know it’s supposed to be set to cool, this will ensure the heat wasn’t accidentally turned on. Additionally, you want to make sure that the batteries are working, and that the temperature is not set too high. Remember, the “auto” function only utilizes the fan when air is being heated or cooled. The “on” function means the fan will run 24/7 to circulate the air, even if the A/C or heater is off. We recommend using the “auto” function most of the time and only switching to “on” when needed.
Assess air filter condition
A dirty air filter can be due to debris buildup which leads to frozen evaporator coils. You may think that frozen = cool air, but frozen coils actually impede the flow of cool air, which can lead to warm air flow from the running motor instead. Air filter replacements should be completed by the owner every 30-60 days, depending on the climate, filter type, and household. We recommend setting a monthly reminder to check the condition of your air filter at the start of every month. If light barely passes through the filter when you hold it up to the light, you should replace it with a fresh one.
Check refrigerant level
One of the main causes of a malfunctioning air conditioner is low refrigerant. If you have a worn service valve, loose joints, or poor assembly, you could have undercharged or overcharged refrigerant. When dealing with the coolant that these HVAC units require, it’s best to leave those jobs to the professionals as coolant isn’t the safest substance to handle unless you’ve been properly trained.