Why Is My AC Not Cooling My House in Houston, TX?

Houston summers put extreme stress on air conditioning systems, and one of the most common calls we receive at Rich Air Conditioning & Heating is: “My AC is running, but my house isn’t cooling.”

If you’re experiencing this issue, there are several possible causes—some simple, and some that require professional repair.

1. Dirty Air Filter

Refrigerant is what actually cools the air inside your system. If levels are low due to a leak, your AC will run constantly but never reach the set temperature.

Solution: This requires professional AC repair service.

2. Low Refrigerant Levels

Refrigerant is what actually cools the air inside your system. If levels are low due to a leak, your AC will run constantly but never reach the set temperature.

Solution: This requires professional AC repair service.

3. Dirty Outdoor Condenser Unit

Houston dust, grass clippings, and humidity can clog your outdoor unit, preventing heat from escaping.

Solution: Gently clean around the unit and remove visible debris.

4. Frozen Evaporator Coil

If airflow is restricted or refrigerant is low, your evaporator coil can freeze, stopping the cooling process entirely.

Solution: Turn off your system and call a technician.

5. Thermostat Issues

Sometimes the issue isn’t your AC—it’s your thermostat. Incorrect settings or failing sensors can prevent proper cooling cycles.

When to Call a Professional

If basic troubleshooting doesn’t restore cooling, it’s time to schedule service.

Rich Air Conditioning & Heating provides fast, reliable AC repair throughout Houston, Katy, Richmond, Sugar Land, and surrounding areas.