AC Not Cooling in Memphis? Here’s What to Check Before Calling for Service

Quick Summary: If your AC isn’t cooling in Memphis, the issue is often something simple—like a clogged filter, incorrect thermostat settings, or a tripped breaker. Sometimes it’s a frozen evaporator coil, dirty outdoor unit, or airflow restriction. Before calling for professional help from Gentry’s Heating & Cooling, try a few quick checks to rule out easy fixes and get your home comfortable again.

When the Memphis heat hits, a cooling issue can become urgent—fast. Whether you're in Memphis, Collierville, Germantown, Cordova, or Hernando, here’s a clear guide to diagnosing why your AC might not be keeping up and what you can do first.

1. Check Your Thermostat Settings

Start with the easiest step. Make sure your thermostat is set to “Cool” and the temperature is set lower than your home’s current indoor temperature. Also check that it’s not set to “Fan Only”, which blows air but doesn’t cool it.

2. Replace or Clean a Clogged Air Filter

A dirty filter is the most common reason an AC won’t cool. When your air filter is clogged, it restricts airflow and can even cause freezing inside your system. Swap it out and see if temperatures start to improve.

3. Look for a Tripped Breaker

If the outdoor unit loses power, your indoor unit may still run—but only blow warm air. Check your electrical panel for a tripped breaker and reset it if needed. If it trips again, that’s a sign to call for service.

4. Inspect for Frozen Evaporator Coils

If you notice ice buildup on the indoor coil or refrigerant lines, turn the system off immediately. Frozen coils can result from dirty filters, airflow issues, or low refrigerant levels. Let it thaw before restarting, but plan to have it inspected if it freezes again.

5. Clean Around the Outdoor Unit

Your outdoor condenser needs space and airflow to release heat. Grass, leaves, or debris buildup around the coils can make your AC struggle. Clear any obstructions and gently rinse the unit with a hose to remove dirt from the fins.

6. Consider Low Refrigerant

If your AC still runs but can’t cool effectively—especially if you notice hissing sounds or prolonged run times—low refrigerant may be the culprit. This usually means there’s a leak that must be repaired by a licensed HVAC technician.

7. Think About Airflow or Ductwork Problems

If certain rooms aren’t cooling or airflow feels weak, you may have a duct issue such as leaks, blockages, or disconnected sections. Learn more about duct services on our Ductwork page.

When to Call Gentry’s Heating & Cooling

If these quick checks don’t bring relief—or your system continues to struggle—our team at Gentry’s Heating & Cooling is here to help. We provide reliable AC Repair , full Residential HVAC services, and fast diagnostics across Memphis, Collierville, Germantown, Cordova, Hernando, and the surrounding communities.

Still dealing with an AC not cooling? Request service today and we’ll get your home comfortable again—quickly and professionally.