Home › Common Problems › AC Not Cooling Enough
AC Not Cooling Enough
in Garland, TX
When your AC runs all day but the house never cools down, something is wrong with how the system moves or cools the air. Garland sits in one of the hottest urban heat pockets in North Texas, and houses built in the 1980s often have equipment that was never sized right for today's heat. Left alone, the system overworks itself until the compressor fails.
Quick Answer
In Garland summers, temperatures stay above 100°F for weeks at a stretch, and an undersized or low-refrigerant system simply cannot keep up. A technician will check refrigerant levels, measure airflow, and inspect the coils. If refrigerant is low, the leak gets found and fixed before recharging. Call (361) 338-5229 when rooms stay above 80°F with the AC running.
Telltale Signs
Warning Signs to Watch For
- Thermostat set to 72°F but rooms stay at 80°F or warmer
- AC runs for hours without cycling off
- Warm air blowing from vents even when the unit is running
- Upstairs rooms are noticeably hotter than downstairs
- Electric bill spikes with no change in usage habits
- Ice forming on the copper lines outside near the unit
Root Causes
What Causes AC Not Cooling Enough?
Low Refrigerant From a Leak
Refrigerant is the fluid that pulls heat out of your air. When a line or coil develops a leak, the system loses that fluid and cannot absorb enough heat. In Garland, the freeze-thaw cycles in January stress copper connections, and small cracks open up over time.
The Fix
Leak Detection and Refrigerant Recharge
A technician uses a detector to find the exact leak point, seals or replaces that section, and then recharges the system to the manufacturer spec. Just adding refrigerant without fixing the leak is a short-term patch that fails again.
Dirty or Clogged Evaporator Coil
The evaporator coil sits inside your air handler and pulls heat from the air passing over it. When dust and mold coat the coil, air cannot transfer heat into the refrigerant. Garland's humid spring months push mold growth fast, especially in systems that sit idle through winter.
The Fix
Evaporator Coil Cleaning
The coil gets cleaned with a foaming agent that breaks up the buildup without damaging the fins. After cleaning, airflow improves and the system can actually reach the set temperature again.
Undersized AC System
A unit too small for the square footage will run constantly and still fall short on the hottest days. Many homes in the Firewheel area of Garland were built in the early 1990s with systems sized to older, looser insulation standards that no longer match how people use the space.
The Fix
Load Calculation and System Replacement
A proper load calculation measures your home's square footage, insulation, window count, and sun exposure to find the right unit size. Installing a correctly sized unit means the system cycles normally and actually cools the house.
Self-Diagnosis
Which Cause Applies to You?
Check the signs you're observing to narrow down the likely root cause before your inspection.
| What You're Seeing | Low Refrigerant From a Leak | Dirty or Clogged Evaporator Coil | Undersized AC System |
|---|---|---|---|
| Ice on the copper refrigerant lines outside | |||
| Warm air from vents with compressor running | |||
| System never shuts off even on mild days | |||
| Musty smell coming from vents | |||
| Gradual cooling loss over several seasons |
Free Inspection
Get a Diagnosis in Garland
An on-site inspection is the only way to confirm which cause applies to your property. Free, no obligation.
(361) 338-5229Free on-site inspection
Written estimate before work starts
Serving Garland & surrounding areas
Other Problems
Services That Fix This
Also Helpful