Size, efficiency, ductwork and warranty are the real questions in AC replacement for Memphis, TN, far more than the new unit outside. A good proposal opens with a load calculation, matches the indoor and outdoor equipment, checks the ducts and registers the warranty for you. To describe your system, use Call Now, and you will reach an independent HVAC contractor serving 59 ZIP codes around Memphis.
Signs it may be time to replace
- The equipment has a poor record of reliability or an expired warranty
- It uses R-22 refrigerant, which is no longer produced, and has a leak
- Cooling is uneven and utility bills have risen without another cause
- A major part such as the compressor or the coil has failed
- The system is more than about 12 to 15 years old and repairs are frequent
Matched system, line set and ducts
- Install a matched indoor coil and outdoor unit so the rated efficiency can be achieved
- Inspect, seal and balance the ductwork and check static pressure
- Set the condenser on a level pad with correct clearances
- Flush or replace the line set and check for leaks
- Replace the thermostat if it is not compatible
Efficiency ratings: SEER2, EER2 and HSPF2
Cooling efficiency is described by SEER2 and EER2, and heat pump heating efficiency by HSPF2, all under the testing standard in use since 2023. Minimum ratings differ by region and run higher in southern states, so read the label. A higher rating can reduce energy use, but only when the size is right and the ducts are good.
Permits, warranty and paperwork
Replacing a system can trigger a mechanical permit requirement in many cities, while homeowners associations frequently regulate condenser placement. Settle who will pull the permit, who will deal with the inspection, how the warranty is registered and what the labor warranty includes, then file the proposal, the permit and the warranty documents.
Sizing the new system: tonnage and Manual J
Cooling capacity is measured in tons, with one ton equal to 12,000 BTU per hour. An oversized system short cycles, cools unevenly and leaves the home humid, while an undersized one never catches up. Equipment is sized by a Manual J load calculation that takes in square footage, insulation, windows, orientation, infiltration, ducts and occupants. Be wary of any quote that simply copies the old unit's size.
How an AC replacement visit works, step by step
A diagnostic visit should follow a repeatable order so the technician finds the cause, not just the symptom. Knowing the order helps you tell a thorough visit from a part swap.
- Interview: what you noticed, when it started, how the system sounds and what you have already tried.
- Visual check: thermostat settings, filter, supply and return registers, the air handler, the condensate line and the outdoor unit.
- Electrical tests: breaker and disconnect, capacitor microfarad rating, contactor contacts, motor amperage and control voltage.
- Airflow and temperature: the temperature drop across the evaporator coil and, where needed, static pressure in the ductwork.
- Refrigerant checks: pressures, superheat and subcooling, and a leak search if the charge is low.
- A written finding: the cause, the repair options and what each one would fix, before any part is replaced.
Questions to ask before approving a repair
- Will you give me the findings and the scope in writing before work starts?
- What are my options: repair now, repair and monitor, or replace?
- What does the repair warranty cover and for how long?
- How old is the system and which refrigerant does it use?
- What failed, how did you confirm it and can you show me the part or the reading?
What shapes the written scope
Two AC calls that sound alike can be very different jobs. The written scope should say what the technician found and which of these factors applied.
Have the provider show the diagnostic and the repair as separate items, and list any parts, labor or follow-up that are left out.
- Whether the ductwork, return air or thermostat contributes to the problem
- The age, tonnage and refrigerant type of the system
- Access to the air handler in the attic or closet and to the outdoor unit
- Whether the fault is an electrical part, an airflow problem, a refrigerant leak or a drainage problem
- Warranty status of the parts and whether the equipment is registered with the manufacturer
Mistakes that make AC problems worse
- Running a frozen system. Ice means airflow or refrigerant is wrong, and running it can damage the compressor.
- Putting off a small repair. A weak capacitor can take out a compressor if left alone.
- Adding refrigerant without finding the leak. The charge will drop again and the leak may grow.
- Ignoring a dirty filter. It is the most common cause of poor airflow and frozen coils.
- Setting the thermostat much lower to cool faster. An AC cools at a steady rate, so it only runs longer.
Safety and rules to know
Three hazards share one machine in an air conditioner: high-voltage electricity, pressurized refrigerant and moving parts. Opening electrical panels, bridging contactors and adding refrigerant are not jobs for homeowners, and capacitors can keep a charge after the power is off.
In the United States, anyone who buys or handles refrigerant must be certified under EPA Section 608, and refrigerant must be recovered and not vented. Ask the technician for their certification and check the contractor's licence with Tennessee Board for Licensing Contractors (HVAC classifications).
What makes AC replacement different in Memphis
Hot, humid Mid-South summers with heat indexes often above 100 degrees; winters can bring ice storms. Humidity drives condensate drain clogs, sweating ducts, and mold in air handlers.
Memphis Light, Gas and Water (MLGW) is the local utility. Older homes in Midtown, Cooper-Young, Binghampton, and Whitehaven; newer homes in Cordova, Collierville, Germantown, and Bartlett. The diagnosis and the equipment recommendation for your address can both be shaped by these local conditions, so ask the technician how.
AC replacement across Memphis and nearby cities
59 ZIP codes in Memphis, Tennessee fall within the area of Air Conditioning Repair Memphis: 37501, 37544, 38101, 38103, 38104, 38105, 38106, 38107, 38108, 38109. Requests may also go to providers who serve Ellendale, Germantown, Cordova and Collierville. Coverage depends on the address, so state your ZIP code on the call.
An independent HVAC contractor is one call away: use Call Now at the top of any page and describe the symptoms and the age of the system. The contractor confirms your address, then examines the system in person to diagnose it.
Related help in Memphis
If this is not quite your situation, these pages cover the neighboring questions: Summer HVAC Checklist for Memphis; What Size AC Do You Need? Tonnage and Load Calculation; AC Maintenance and Tune-Up; Heat Pump Repair and Installation. The service area list shows every nearby city and ZIP code covered.
AC Replacement in Memphis: common questions
Do I need to replace the whole system?
Mismatched indoor and outdoor units rarely reach their rated efficiency. Many manufacturers require matched components to honor warranties.
What size AC do I need?
A load calculation for your own house settles it, so do not accept sizing by rule of thumb.
When should I replace instead of repair my AC?
Consider it if the unit is old, uses R-22, has suffered a major failure or keeps having problems. Your technician can compare repair and replacement options for the system.
How long does a replacement take?
A day or two is typical for a replacement, with the system, the ducts and the permit schedule affecting the time.
What happens to the old refrigerant?
Under EPA rules a certified technician recovers the refrigerant and disposes of it properly.
Do I need new ductwork?
Not always, but leaky or undersized ducts reduce comfort and efficiency, so ask for a duct inspection.