🌡️ AC Temperature Control Correction, Georgetown TX

Georgetown's design cooling temperature (the temperature HVAC systems are sized to handle) is 100°F. When temperatures regularly exceed this, as they do for 20-30 days per summer, systems sized for design day will lose setpoint. This isn't a malfunction. However, systems undersized at installation (often by 10-15% in older Georgetown neighborhoods) will lose setpoint on even moderate summer days.

A system that gradually loses refrigerant capacity is the most common reason a system that "used to keep up" now can't. 10% below spec charge typically means 15-20% reduced cooling capacity, enough to lose setpoint on peak summer days. This is common in Georgetown systems 8+ years old that have never been serviced.

A thermostat located in direct sun, near a heat-generating appliance, or in a room with poor airflow will read higher than the actual home average. The system runs continuously trying to cool a thermostat that's been artificially warmed. Relocating or recalibrating the thermostat can solve what appears to be a system performance problem.

If the system maintains setpoint in most areas but specific rooms stay 5-10°F warmer, the problem is distribution, not capacity. Duct imbalances, blocked registers, or closed dampers create zones where conditioned air doesn't reach effectively. This is common in Georgetown's two-story new construction where the second floor runs consistently warmer.