Announcement: LB Chase Earns Industry-Leading NPS® Score in Customer Satisfaction.
LB Chase Heating & Air
Justin Wood, General Manager
Email Justin: GM@LBchase.com
Rated 4.9 on 
(393 Reviews)
Lead Funnel - AC Not Cooling Appointment
LB Chase is Rated 4.9 on and Received an Industry Leading NPS® Score in Customer Satisfaction
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About Our AC Not Cooling Service Appointments
Justin Wood, General Manager
Email me: GM@LBchase.com
When your AC is not cooling your home or is blowing warm air, it usually means the system is running but not removing heat the way it should. The cause may be simple, like a dirty air filter, thermostat setting, or blocked airflow. It can also be related to low refrigerant, a refrigerant leak, a frozen coil, a dirty outdoor unit, or a failing component such as a capacitor, compressor, or blower motor.
If your system is running but the house is not getting cooler, it is a sign something is not operating efficiently and may get worse if left unresolved.
After you complete the short form above, an LB Chase comfort advisor will contact you within 1–2 hours during normal business hours to schedule your appointment. During your visit, our technician will inspect your thermostat, filter, airflow, indoor coil, outdoor unit, refrigerant levels, and key electrical components to identify the root cause of the cooling issue.
We will explain what we find in clear, straightforward terms, walk you through your repair options, and help you make the best decision for your home. If the system can be fixed, we will show you how. If the system is older, inefficient, or no longer cost-effective to repair, we can also walk you through replacement options with no pressure.
LB Chase Heating & Air has been serving Sevierville, Maryville, Seymour, Kodak, Pigeon Forge, and surrounding East Tennessee communities since 1995. Our goal is simple: restore comfort to your home with honest diagnostics, clear communication, and reliable service.
Frequently asked questions about why your AC is not cooling or blowing warm air
Why is my AC running but not cooling my house?
If your AC is running but not cooling, it is often due to restricted airflow or a refrigerant issue. Common causes include a dirty air filter, blocked vents, dirty evaporator coil, low refrigerant, or a refrigerant leak. It can also be caused by a malfunctioning compressor or outdoor unit not working properly.
Why is my AC blowing warm air?
Your AC may blow warm air if the thermostat is set incorrectly, the outdoor unit is not running, or the system has low refrigerant. Other causes include a dirty condenser coil, electrical issues, or a failing compressor. Even a tripped breaker to the outdoor unit can cause warm air.
Why is my house not getting cooler even though the AC is on?
If your home is not cooling, your system may be struggling to remove heat. This can be caused by poor airflow, undersized equipment, duct leaks, dirty coils, or extreme outdoor temperatures. In many cases, the system is running but not operating efficiently.
Can a dirty air filter cause my AC to not cool?
Yes. A dirty air filter can restrict airflow, which reduces the system’s ability to move air across the evaporator coil. This can lead to reduced cooling performance and, in some cases, cause the system to freeze up.
Why is my outside AC unit running but not cooling?
If the outdoor unit is running but the home is not cooling, it could be due to low refrigerant, dirty coils, airflow issues, or a failing compressor. The system may be operating, but not transferring heat effectively.
Why is my AC cooling sometimes but not consistently?
Inconsistent cooling can be caused by thermostat issues, airflow restrictions, refrigerant problems, or intermittent electrical failures. It may also point to a system that is beginning to fail or struggling during peak heat.
Should I turn off my AC if it is not cooling properly?
If your AC is running but not cooling, it is generally safe to turn it off and schedule service, especially if you notice warm air, weak airflow, or unusual noises. Continuing to run the system may increase wear on components or worsen the issue.
When should I call an HVAC technician for an AC not cooling issue?
You should call a technician if your AC is blowing warm air, not lowering the temperature, running constantly, or showing signs like weak airflow or ice buildup. If basic steps like changing the filter or checking the thermostat do not resolve the issue, a professional diagnosis is recommended.