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AC Not Cooling Enough
in Allen, TX
When your AC blows air but the house stays above 80 degrees on a July afternoon, something is wrong. Allen summers regularly push past 100 degrees, and a system that can't keep up will run nonstop, driving up your electric bill and wearing out the compressor fast. Most of the time it comes down to low refrigerant, a dirty evaporator coil, or a unit that was never sized right for your home.
Quick Answer
In Allen, summer heat regularly hits 100 degrees or more, and an AC that runs but can't keep up usually has a refrigerant leak, a dirty coil, or a unit that's too small for the house. A technician needs to check the refrigerant charge and inspect the coil. If you ignore it, the compressor works overtime and fails early. Call (361) 320-8102 to get it checked before the hottest weeks hit.
Telltale Signs
Warning Signs to Watch For
- The thermostat is set to 72 but the house stays at 80 or warmer
- The outdoor unit runs constantly without cycling off
- Airflow from the vents feels weak or barely cool
- Your electric bill jumped significantly compared to the same month last year
- The air near the vents feels humid instead of dry and cool
- Ice forms on the copper lines going into your indoor unit
Root Causes
What Causes AC Not Cooling Enough?
Low Refrigerant From Leak
Refrigerant is the fluid that pulls heat out of your home's air. When there's a leak, the system loses its ability to absorb heat, so the air coming out of your vents is barely cool even when the unit runs all day. In Allen, units work so hard from May through September that small leaks in the coil or line connections get worse faster than they would in a milder climate.
The Fix
Leak Detection and Refrigerant Recharge
A technician uses a leak detector to find the exact spot, repairs the leak, and then recharges the system to the manufacturer's specified level. Just adding refrigerant without fixing the leak is a waste of time and money — it will be low again within weeks.
Dirty Evaporator Coil
The evaporator coil sits inside your air handler and absorbs heat from the air passing over it. When it gets coated in dust and grime, it can't absorb heat efficiently, and the system blows warm or barely cool air. Homes in Allen built in the 1990s and early 2000s often have older return air setups that pull in more dust than newer designs.
The Fix
Evaporator Coil Cleaning
A technician removes the access panel, cleans the coil with a foaming coil cleaner, and flushes it out. A clean coil can bring cooling performance back close to what the unit was doing when it was new.
Undersized AC Unit
An AC unit that's too small for the square footage of your home will run nonstop and never reach the set temperature on a 100-degree Allen afternoon. This is common in homes that had additions built on without upgrading the HVAC system to match the new size.
The Fix
Manual J Load Calculation and Unit Replacement
A proper load calculation accounts for your home's square footage, insulation, window count, and ceiling height. If the unit is undersized, replacing it with the correctly sized equipment is the only real fix.
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 Leak | Dirty Evaporator Coil | Undersized AC Unit |
|---|---|---|---|
| Ice on the copper refrigerant lines or indoor coil | |||
| Weak airflow from every vent in the house | |||
| House never reaches set temperature even at night | |||
| Air from vents feels humid and not cold | |||
| Unit runs all day without shutting off at all |
Free Inspection
Get a Diagnosis in Allen
An on-site inspection is the only way to confirm which cause applies to your property. Free, no obligation.
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