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❄️ Georgetown TX · Same-Day Available

❄️ AC Not Cooling Diagnostics, Georgetown TX

Your AC is running but the house won't cool down. This is one of the most common summer calls in Georgetown, and one of the most misdiagnosed. The symptom (no cooling) can come from a dozen different failure points. ProAir works through a systematic diagnosis to find the actual cause before recommending any repair.

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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:

1. Failed Run Capacitor ($85-$150)

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.

2. Low Refrigerant Charge ($150-$350)

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.

3. Frozen Evaporator Coil ($0 + root cause repair)

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.

4. Failed Compressor ($800-$1,800)

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

We also check the thermostat batteries and wiring connections early in the visit, since a simple dead battery or a loose low-voltage wire can occasionally produce a complete no-cooling symptom that has nothing to do with the outdoor unit at all.

Frequently Asked Questions, AC Not Cooling Diagnostics

Why is my AC running but not cooling the house? +
Most commonly: a failed run capacitor (compressor can't start), low refrigerant, or a frozen coil. Georgetown's summer heat accelerates all three. We diagnose systematically, not by guessing.
How long does a no-cooling diagnosis take? +
Most diagnostic visits in Georgetown are 45-60 minutes. If the cause is a capacitor or contactor, we carry those on-truck and can repair same visit. Refrigerant work takes slightly longer.
Could low refrigerant be from the original installation? +
Yes, this is common in Georgetown's new-construction neighborhoods. Builder-grade installations often leave factory charge without field-adjusting for actual lineset length. A 5-year-old system in Wolf Ranch or Water Oak may have been under-charged from day one.
My system was cooling yesterday, why won't it today? +
Georgetown's first 100°F day of the season often triggers failures that were marginal at lower loads. A capacitor at 80% output may work fine at 90°F but fail when the compressor is trying to start at full load during peak heat.
The fan runs but no cold air comes out, what does that usually mean? +
This points toward the compressor or refrigerant circuit rather than the blower or ductwork, since the fan moving air normally rules out most airflow-side causes. We check compressor electrical draw and refrigerant pressures first in this exact scenario.
Could a tripped breaker be the entire reason my AC isn't cooling? +
Yes, it's one of the first things we check. A breaker that's tripped cuts power to the outdoor unit entirely, so the indoor fan may still run on its own circuit while the compressor and condenser sit idle, producing exactly the no-cooling symptom you're describing.

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