Should I repair or replace my old AC?

Age alone does not decide whether to repair or replace an AC. Start with a confirmed failed part and cause. Then compare the likely durability of the repair with the condition of the rest of the system, the ducts, prior comfort, available support, and a properly designed replacement. Get both paths in writing when both are realistic.

Skip formulas that multiply age by repair price or declare replacement after one birthday. ENERGY STAR says equipment over ten years old deserves evaluation; it does not set a mandatory replacement age. Its replacement guidance also points to recurring repairs, comfort, humidity, noise, ducts, and insulation as parts of the decision.

Require a diagnosis before a decision

The technician should name the failed part, show the measurements that support the diagnosis, and explain the underlying cause. “Low refrigerant,” “bad compressor,” and “old unit” are incomplete without the test results and system context.

For a refrigerant leak, get the exact location and how it was confirmed. EPA tells homeowners to request leak location and repair instead of repeated top-offs in its homeowner FAQ. Refrigerant-circuit work requires Section 608 certification, and intentional venting is prohibited under EPA’s equipment-management guidance.

The repair proposal should state the part, labor, refrigerant, testing, warranty, and what happens if the repair does not restore performance. It should also say whether the rest of the indoor unit, outdoor unit, electrical components, and matched system were checked.

Facts that can lean toward repair

A repair may deserve stronger consideration when the failure is isolated, the cause is known, compatible parts and refrigerant service are available, and the rest of the system is in acceptable condition. The case is stronger when comfort and moisture control were good before the failure and the repair has a clear written warranty.

A repair can also create time for a measured replacement plan. That matters when the replacement proposal lacks a load calculation, exact matched equipment, duct assessment, permit plan, or commissioning details.

No source can promise how many years a generic repair will add. Parts, equipment condition, installation, runtime, and the cause of failure vary.

Facts that can lean toward replacement

Replacement may deserve stronger consideration when failures keep returning, several major parts carry known risk, compatible parts are unavailable, or the proposed repair leaves the system with a poor indoor-outdoor match. Unresolved humidity, airflow, room imbalance, noise, or operating trouble from before the failure should also enter the comparison.

Replacement only improves the underlying problem when the new design addresses it. A higher efficiency label cannot correct restricted ducts, return leakage, bad airflow, incorrect charge, or a house moisture source. ENERGY STAR puts sizing, matched installation, airflow, charge, and duct work together in its quality-installation guidance.

Personal risk matters too. A household with medical heat sensitivity, tenants, repeated outages, or little tolerance for another failure may value reliability differently. That is a planning input, not proof that a repair is technically wrong.

What the refrigerant rules actually say in 2026

Existing R-22 equipment is not federally required to be replaced. New production and import of R-22 ended in 2020, while reclaimed and previously produced refrigerant can still support existing systems. EPA explains this in its homeowner FAQ. Availability and local price still need a current quote.

EPA says there is no universal drop-in replacement for R-22 equipment. A retrofit needs an EPA-acceptable substitute, compatible system changes, refrigerant recovery, and Section 608-certified work. Do not approve refrigerant mixing or an unlabeled substitution. See EPA’s homeowner FAQ.

Existing R-410A systems can also continue operating and receiving service. New equipment is moving to refrigerants under current federal global-warming-potential limits, but the rule does not make an installed R-410A system illegal. EPA’s HFC FAQ separates installed systems from new-equipment restrictions.

EPA now allows a new higher-GWP residential or light-commercial system to be installed without a fixed end date only when all specified components were manufactured or imported before January 1, 2025. That exception covers remaining pre-2025 inventory until it runs out. Components made later for servicing existing equipment do not create the same exception for a new system. The current sector table and May 2026 fact sheet are the controlling references.

The contractor should name the refrigerant, exact indoor and outdoor components, manufacture dates when relevant, and the rule that applies. These federal details are volatile, so verify the applicable rule and equipment dates before signing a proposal.

Compare a real replacement design

A replacement proposal should include a house-specific load calculation, equipment selection from manufacturer data, exact indoor and outdoor model numbers, and the AHRI certificate for that match. It should cover ducts and returns, thermostat and control compatibility, condensate and overflow protection, electrical scope, permit handling, start-up measurements, and written warranties.

The AHRI certificate verifies the rated equipment combination. It does not prove correct sizing or field performance. AHRI explains the boundary in its certification guide.

The proposal should state how airflow, static pressure, refrigerant charge, and operation will be checked after start-up. It should separate existing problems included in the scope from those that remain. A replacement that copies the old tonnage without checking the current house can repeat the old complaint.

New Orleans currently requires mechanical permits for covered installation, repair, replacement, and alteration work. The written scope should say how the permit applies and who will obtain and close it. The City gives the current process on its mechanical-permit page.

Check current money claims

Do not count on a 2026 federal Energy Efficient Home Improvement Credit for a residential AC or heat-pump project. The IRS says Section 25C applies to qualifying property placed in service through December 31, 2025. See the current IRS credit page.

Energy Smart has a 2026 AC replacement rebate path for eligible Entergy New Orleans customers. The form says eligibility, equipment, documents, timing, available funds, and changing program terms apply. Before counting the rebate, confirm who will verify the project, provide the AHRI certificate and invoice, and submit on time. Do not subtract it from the decision until the live program confirms it. The official 2026 rebate form is the dated source.

Avoid promised savings and payback periods without a house-specific calculation. Weather, settings, ducts, envelope, sizing, and installation change the result.

Evidence to gather before signing

Photograph the indoor and outdoor model and serial labels without opening panels. Record the refrigerant on each nameplate. Gather prior repair invoices, warranties, the original proposal, utility history, and any load calculation or AHRI certificate.

Get separate written repair and replacement scopes. Each should show what is included, excluded, warranted, and measured. The replacement scope should say who owns permit, rebate, disposal, start-up, and callback work.

Compare the written repair and replacement scopes side by side before signing.