
AC Not Cooling Diagnosis & Repair in Bartlett
When an air conditioner runs but the house stays warm, the cause can be airflow, a dirty coil, the thermostat, an electrical part or a refrigerant leak. Call to be connected with an independent HVAC contractor serving Bartlett, who diagnoses the actual cause before any repair.
The U.S. Department of Energy lists the usual suspects: dirty filters, dirty evaporator or condenser coils, thermostat or sensor problems, electrical failures in controls, capacitors or contactors, a clogged condensate drain, leaky ducts and low refrigerant caused by a leak. Several of these produce the same symptom, which is why a diagnosis comes first and a part is replaced only once the fault is confirmed.
A few checks are safe for a homeowner before calling. Make sure the thermostat is set to Cool and below room temperature, that its batteries are not dead, that the air filter is not clogged and that supply and return vents are open. Check the breaker panel, but do not open the outdoor unit. If you see ice on the indoor coil or the refrigerant lines, switch cooling off and let the fan run so the ice can melt before a technician looks at it.
A typical diagnostic visit includes measuring the temperature difference between return and supply air, checking airflow and the filter, looking at both coils, testing electrical components with the power isolated, checking the condensate drain and, if needed, connecting gauges to read system pressures. The result should be a plain explanation of what failed and a written estimate before work begins.
Ask the contractor what the diagnostic charge covers, whether the repair estimate is itemized, and whether the system's age and refrigerant type change the recommendation. You decide whether to approve the repair. If the system is old and the repair is large, it is reasonable to ask for a repair-versus-replace comparison in writing.
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Homeowners: please call if you own the home and make the decisions about repairs. Calls about billing or an existing appointment cannot be handled here.

