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AC Not Cooling Enough
in Richardson, TX
Richardson summers regularly push past 100 degrees, and an AC that can't keep up turns your home into an oven fast. Most of the time the system is low on refrigerant, the coil is caked with dust, or the unit is just too small for the house it's trying to cool. Left alone, the compressor overworks itself and dies, and a compressor replacement is a much bigger job than whatever caused the problem in the first place.
Quick Answer
When your AC runs but can't cool your house, it's usually low refrigerant, a dirty coil, or an undersized system struggling with Richardson's summer heat. A technician will check pressures, clean the coil, and find the real cause. Ignoring it makes the compressor work harder and fail sooner. Call (361) 202-9465 to get it looked at before the next heat wave hits.
Telltale Signs
Warning Signs to Watch For
- The thermostat is set to 72 but the house won't get below 80
- The AC runs almost nonstop but you feel little to no cold air at the vents
- The outdoor unit is running but the air coming from vents feels room temperature
- Your electric bill has jumped noticeably even though you haven't changed the thermostat
- Ice forms on the refrigerant line running to the outdoor unit
- Rooms far from the air handler are noticeably hotter than rooms near it
Root Causes
What Causes AC Not Cooling Enough?
Low Refrigerant From a Leak
Refrigerant is the fluid that actually moves heat out of your house. When a line develops a small leak, the system slowly loses its ability to absorb heat, and the AC runs constantly without dropping the temperature. In Richardson's long cooling season, systems run hard from April through October, which stresses the copper lines and fittings and makes small cracks more likely over time.
The Fix
Leak Detection and Refrigerant Recharge
A technician finds the leak using a detector or UV dye, repairs the line or fitting, and then refills the refrigerant to the correct level. Just adding refrigerant without fixing the leak is a temporary patch that won't last.
Dirty Evaporator or Condenser Coil
The evaporator coil sits inside the air handler and pulls heat out of the air. When it gets coated in dust and debris, it can't transfer heat anymore, so the air passing over it barely cools down. Richardson's clay soil kicks up a lot of fine dust, and if the filter isn't changed regularly, that dust coats the coil within one season.
The Fix
Coil Cleaning
The technician removes the buildup from the coil using a foaming cleaner and a rinse, which restores its ability to absorb heat. A clean coil also uses less electricity and puts less strain on the compressor.
Undersized System for the Home
An AC unit that's too small for the square footage will run all day and never reach the set temperature when it's 100 degrees outside. Many homes in the Canyon Creek and Breckinridge Park areas were built in the 1970s and have had additions put on since, and the original unit was never resized to match.
The Fix
Load Calculation and System Replacement
A proper load calculation measures the actual cooling demand of the whole house, including insulation, windows, and square footage. The right-sized unit will reach the set temperature and shut off rather than running forever.
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 Evaporator or Condenser Coil | Undersized System for the Home |
|---|---|---|---|
| Ice on the refrigerant line outside | |||
| Airflow feels weak at every vent in the house | |||
| System can't cool down even on mild 85-degree days | |||
| House cools fine in spring but loses ground once it hits 100 degrees | |||
| Electric bill is high but the house is still warm |
Free Inspection
Get a Diagnosis in Richardson
An on-site inspection is the only way to confirm which cause applies to your property. Free, no obligation.
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