Air conditioning units play a key role in keeping homes cool and comfortable. However, there might be instances where your AC unit seems to be running but it’s not blowing cold air into your home. Dealing with a malfunctioning air conditioner is always frustrating, especially during the summer months, but your first step should be trying to identify the problem.
Here are a few possible reasons why your air conditioner is running but not blowing cool air.
Dirty Air Filters
One common reason why an AC unit might not blow cold air is due to dirty air filters. Over time, dirt and debris accumulate on the filters — after all, the more particulates the filter catches, the fewer will circulate throughout your home. However, if so much debris collects on the filter that air can’t get through, your system will work much harder than it should to keep your home cool. This can lead to poor cooling performance and even damage your AC system in the long run. It’s important to regularly check and replace your air filters every 30 to 90 days to ensure optimal airflow and system efficiency.
Sometimes, the problem might not be with your AC unit itself, but with the thermostat. A malfunctioning thermostat can cause your AC to run without blowing cold air, or it might not turn on the AC at all. You will need to check to see if your thermostat is set to the right temperature and mode; sometimes it’s as simple as the thermostat getting set to heating instead of cooling or vice versa.
Air filter and thermostat issues are problems you can fix yourself, but other causes of your AC not blowing may require the work of a professional, such as the ones below.
Frozen Evaporator Coil
The evaporator coil works by absorbing heat from the air, and if it becomes frozen, it cannot perform this task. Many times this can happen due to low refrigerant levels, poor airflow, or a malfunctioning blower motor. You will need to turn off your AC and allow the ice to thaw before you inspect your air filters for any blockages. If the problem continues, you may need to consult a professional HVAC technician to check for refrigerant leaks or other issues.
Leaking or damaged ductwork can cause cool air to escape before it reaches your living spaces. This can make it seem like your AC is running without blowing cold air, even if the unit is functioning properly. Inspect your ducts for visible signs of damage, such as tears, holes, or disconnected sections. You can seal any minor leaks around the vents with duct tape or mastic sealant, but leave the actual ductwork repair to the professionals.
Obstructed Condenser Unit
The condenser unit is located outside your home and is responsible for dissipating heat absorbed by the refrigerant. If the condenser unit is obstructed by debris, dirt, or vegetation, it can’t effectively release heat, leading to poor cooling performance. You will need to regularly clean and maintain your condenser unit by removing any debris, trimming nearby vegetation, and rinsing the unit with a garden hose. Be sure to turn off the power to your AC before cleaning it, and get the help of professionals for any further maintenance tasks.
Blower Motor Malfunction
The blower motor plays an important role in circulating the cooled air throughout your home. If it malfunctions or fails, your AC will not be able to blow the air it cools. Blower motor issues can be caused by a variety of factors, including electrical problems, worn-out belts, or motor failure. Some issues with the blower motor can be resolved with replacement parts or with repairs, but others may necessitate replacing your AC altogether.
Unique Heating & Air Conditioning Inc. offers heating and cooling services for customers in Northglenn and the surrounding areas. We also specialize in providing indoor air quality services. Give us a call today at Unique Heating & Air Conditioning Inc. to learn more about our HVAC services, for more info about how we strive for excellent customer service, or to schedule an appointment!