What "AC Running But Not Cooling" Actually Means
When the system is running but not producing cold air, Georgetown techs work through a hierarchy of causes — from the most common and cheapest to the most serious:
Georgetown's 100°F+ summers kill capacitors faster than almost anywhere in Texas. A failed capacitor means the compressor hums but doesn't start — the fan may run, blowing warm air through the house. This is the #1 cause of "not cooling" calls we receive in July and August.
A system low on refrigerant runs continuously without reaching setpoint. In Georgetown's new-construction neighborhoods (Wolf Ranch, Water Oak, Stonewall Ranch), builder-installed systems are frequently under-charged from day one. Older systems may have developed slow leaks at fittings. We verify charge with gauges — not by feel.
A coil frozen solid blocks all airflow. The system blows air, but nothing cold comes through. This is a symptom, not the cause — dirty coils, low refrigerant, or restricted airflow are the underlying issues. We defrost and diagnose root cause in the same visit.
Compressor failure is the worst-case. The outdoor unit runs (fan spins) but the compressor isn't compressing — zero cooling. On systems over 12 years old in Georgetown, compressor failure usually tips the economics toward full system replacement.
Georgetown-Specific Patterns
Georgetown's heat load — sustained 100°F+ from June through September — accelerates specific failure modes. Run capacitors fail at 5–8 years (not 10) under Georgetown heat stress. Contactor pitting from cycling frequency is more common here than in cooler climates. Systems that performed fine in spring are routinely overwhelmed on the first 100°F day of the season, masking gradual refrigerant loss that hadn't been visible at lower load.
Our No-Cooling Diagnostic Process
- Outdoor unit: capacitor test, contactor inspection, compressor amp draw
- Refrigerant circuit: suction and discharge pressure, superheat and subcooling
- Indoor unit: coil condition, evaporator temperature, airflow measurement
- Electrical: voltage at unit, thermostat signal continuity
- Written estimate before any repair proceeds
Frequently Asked Questions — AC Not Cooling Diagnostics
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What Georgetown Homeowners Say
System stopped cooling on a Saturday at 2 PM. Called ProAir, tech arrived by 5 PM, failed capacitor replaced and cooling by 5:30 PM. That's exactly what same-day service looks like.
Had a noise coming from the outdoor unit for weeks. ProAir diagnosed a failing fan motor bearing — caught it before it failed completely. Saved me from an emergency call in July.
They told me I needed refrigerant. After they added it, cooling improved immediately. Honest diagnosis, fair price, and they explained everything they found. Exactly what you want.