What gets replaced on the cooling side?
Cooling is delivered by two pieces of equipment working as a pair: the outdoor condenser and the indoor coil. Replacing one and keeping the other is sometimes possible and sometimes a false economy, because a mismatched pair will not deliver the efficiency or capacity either component is rated for.
We will tell you which situation you are in rather than defaulting to the larger job. See condenser replacement for the equipment-only route.
When is cooling worth replacing?
- A failed compressor on equipment with significant age behind it.
- A leaking evaporator coil, particularly where the repair cost is a large share of replacement.
- Repeated refrigerant loss, where you have been recharging rather than resolving.
- Cooling that has never really kept up, which may be a sizing or duct problem worth understanding first.
How does refrigerant type affect this?
Different equipment is designed for different refrigerants, and they are not interchangeable. If your existing system runs an older refrigerant, that affects what can sensibly be matched to it, and it is one of the reasons equipment-only replacement is not always straightforward.
What will this cost?
Where cooling is replaced as part of a complete system, the work is quoted after an assessment of your home. Cooling-only work is scoped after assessment. Typical ranges, not quotes.
Repair or replace: how we weigh it
| What we look at | Points toward repair | Points toward replacement |
|---|---|---|
| What failed | A wear item such as a capacitor, contactor or fan motor | Compressor, leaking evaporator coil or cracked heat exchanger |
| Repair history | First real fault the system has had | Repairs stacking up across recent seasons |
| Condition of the rest | Remaining equipment looks sound | Several components visibly tired |
| Cost comparison | Repair sits well below replacement cost | Repair approaches a meaningful share of replacement |
| Comfort history | System kept the house comfortable until now | It never really kept up, which may be sizing or ductwork |
No formula decides this. We look at your equipment and explain what we find. See the repair or replace guide for the longer version.
Common questions
Can an AC last 40 years?
It would be unusual. Most residential air conditioning does not run that long, and equipment still running at that age is rarely doing so efficiently. We would look at it rather than rule it out on principle.
Can I replace just the outdoor unit?
Sometimes. It depends on compatibility with the indoor coil and the refrigerant the equipment uses. We explain honestly when it works and when it results in a mismatched pair.
What does AC replacement cost?
As part of a complete system, typically quoted after an assessment. Cooling-only scope is priced after we have assessed the installation.
Is it cheaper to leave the AC on all day?
Generally it is cheaper to let the temperature drift a little while you are out than to cool an empty house, though extreme setbacks make the system work hard to recover. This is about habits rather than equipment faults.
Reviewed and updated September 2026. Prices shown are owner supplied typical ranges, confirmed after an assessment. If anything here looks out of date, call (615) 400-4993 and tell us.