AC Repair in Hermitage
Air conditioning diagnosis and repair for Hermitage homes — same-day and after-hours.
Answered live, any hour · Licensed Tennessee contractors · No obligation · We never sell your number to five companies at once
Before you call anyone
An air conditioner that stops cooling in a Middle Tennessee July is not a maintenance issue, it is a habitability issue. Most failures, though, are one of about six things — and several of them are cheap. Knowing which one you are looking at before a technician arrives is the difference between a $280 repair and an $8,000 replacement you did not need.
What this looks like in Hermitage
Second-generation replacements in Hermitage were often sized off the original 1970s load calculation, before anyone added insulation or replaced windows. That legacy oversizing is why so many homes here feel cold and damp at once.
- Housing stock
- Heavy 1970s–1990s subdivision stock, much of it now on its second roof and second HVAC system.
- Local conditions
- Sat in the damage path of the March 2020 tornado as it moved east through Donelson and Hermitage.
- Permits issued by
- Metro Nashville Department of Codes and Building Safety
- Areas we cover
- Old Hickory, Andrew Jackson, Tulip Grove, Dodson Chapel and the rest of Davidson County.
On the ground in Hermitage
A lot of Hermitage AC calls trace back to the same root cause: the house got its furnace and coil replaced sometime in the 90s or 2000s, and whoever sized that system just matched the tonnage of the original 1970s unit. Nobody re-ran the load calculation after the attic got more insulation or the single-pane windows got swapped out. So you end up with a system that's oversized for the house as it actually performs today — it cools fast, shuts off before it's pulled the humidity down, then kicks back on a few minutes later. That's why so many houses off Old Hickory Boulevard or back in the Tulip Grove subdivisions feel simultaneously cold and clammy. It's not a failing system, it's a mismatched one.
The March 2020 tornado also left its mark on HVAC here, even in homes that didn't take a direct hit. Roof and siding repairs near Andrew Jackson and Dodson Chapel sometimes disturbed line sets, flashing, or attic ductwork, and problems from that work still surface years later as slow refrigerant leaks or a coil that ices up under load.
If your unit is short-cycling or you've got ice on the line, don't just add refrigerant and call it fixed — get the airflow and duct sizing checked first. In a lot of these older Hermitage systems, that's the actual problem.
Signs you are looking at this problem
- The unit runs constantly but the house never reaches setpoint
- Air from the vents is moving but is not cold
- The outdoor unit hums but the fan does not spin
- Ice visible on the refrigerant line or the indoor coil
- The system trips the breaker, or shuts off after a few minutes and restarts
- Water pooling around the indoor air handler or a ceiling stain beneath it
How urgent is it?
Anyone in the home is elderly, an infant, or medically vulnerable and the indoor temperature is climbing past the mid-80s.
You smell burning, see scorching at the disconnect, or the breaker trips again immediately after being reset.
The system is running but not cooling and outdoor temperatures are above 85.
Cooling is weak but functional, or the problem is one warm room.
What it typically costs in Hermitage
| Job | Typical range | What you should know |
|---|---|---|
| Failed run capacitor | $150–$400 | By far the most common summer failure. The outdoor fan will not start, or starts only if you nudge it. A capacitor is a $30 part; you are paying for the trip and the diagnosis. If a technician tells you a capacitor failure means you need a new system, get a second opinion. |
| Clogged condensate drain | $125–$300 | Endemic in humid Tennessee summers. The safety float switch senses standing water and shuts the system down on purpose. It looks like a dead system and is usually a 20-minute fix. |
| Dirty or blocked evaporator coil | $200–$600 | Causes the freeze-up people mistake for a refrigerant problem. If your line is iced, turn the system to fan-only and let it thaw before anyone diagnoses it — nobody can read pressures on a frozen system. |
| Contactor or relay failure | $175–$425 | — |
| Blower motor failure | $450–$1,200 | — |
| Refrigerant leak, located and repaired | $550–$1,800 | A recharge without finding the leak is a temporary fix being sold as a permanent one. Refrigerant does not get consumed; if it is low, it left. |
| Compressor replacement | $1,500–$2,800 | This is the decision point. On a system past roughly twelve years, a compressor replacement is usually money spent on a machine that will need replacing anyway. |
Middle Tennessee working ranges for planning, updated 2026. Not a quote — the contractor who does the work sets the price, and should confirm it before starting.
Facts that change the math
Since January 1, 2023, split-system air conditioners under 45,000 BTU installed in the Southeast region — which includes Tennessee — must meet a minimum of 14.3 SEER2. A contractor quoting you a lower-efficiency unit is quoting equipment that cannot legally be installed here.
R-22 refrigerant has not been produced or imported in the United States since January 1, 2020. Only reclaimed supply remains, and it is expensive. If your system is pre-2010 and uses R-22, a significant leak usually pushes the economics toward replacement — not because a technician is upselling you, but because the refrigerant itself now costs more than the repair.
Tennessee requires a state contractor's license for projects of $25,000 or more, and a Home Improvement license for smaller residential jobs in certain counties — Davidson, Rutherford, Robertson, Knox, Shelby, Hamilton, Marion and Haywood among them. You can verify any contractor's license yourself at verify.tn.gov before you sign anything or hand over a deposit.
Questions worth asking
Ask these and you will very quickly learn whether the person in your driveway is diagnosing or selling.
- What exactly did you measure, and can you show me the reading?
- Is this repair covered under any remaining manufacturer parts warranty?
- If this part fails, what is the next most likely failure on a system this age?
- What is the total installed cost of replacement, so I can compare it against this repair?
Request a callback
Faster by phone, especially after hours — but if you would rather not call, give us the essentials and a local contractor will reach out.
Common questions
How much does AC repair cost in Hermitage?
Most Hermitage repairs land between $150 and $600. Capacitor and contactor failures — the most common summer calls — are at the low end. Compressor and coil work runs into four figures, which is where the repair-versus-replace conversation starts.
Do I need a permit from Metro to have my outdoor AC unit or coil replaced in Hermitage?
Yes — HVAC replacements and most repairs involving refrigerant lines or electrical work in Hermitage fall under Metro Nashville Department of Codes and Building Safety, since Hermitage is part of Davidson County. A licensed contractor pulling the permit and scheduling inspection is normal practice here, not an extra step tacked on for your address.
Should I repair or replace my air conditioner?
The working rule is age times repair cost. If the system is over twelve years old and the repair exceeds roughly $1,500, replacement usually wins on total cost of ownership. If it uses R-22, that threshold drops sharply, because the refrigerant alone can cost more than the labor.
Why is my AC frozen in the middle of summer?
Almost always restricted airflow — a clogged filter, a dirty evaporator coil, or a closed-off return — or genuinely low refrigerant. Switch the system to fan-only to thaw it before a technician arrives, because pressures cannot be read on a frozen coil.
Can you come out after hours in Hermitage?
Yes. Calls are answered 24 hours a day, including weekends and holidays, and after-hours work is dispatched to whichever vetted Hermitage contractor is actually available rather than to a voicemail box.