Air conditioning replacement: scope, costs, and what to ask

What replacement should address

Start by establishing what is being replaced: the outdoor unit, indoor cooling components, or heating and cooling equipment together. Ask for a documented equipment match and a fresh sizing assessment. Have the quote identify which existing ducts, lines, controls, and electrical connections will be reused, and why reuse is appropriate.

Understand the system being assessed

Central cooling depends on the outdoor equipment, indoor coil, air delivery, and controls working together. Describe both the cooling complaint and the rooms affected.

Carrier — Why an AC may not blow cold air · Source checked 2026-09-06

Useful details to gather before the visit

You do not need to diagnose the equipment. Record the observations you can make without opening panels or accessing unsafe areas.

• Does air move from the vents, and is it cool?
• Is every room affected, or only part of the home?
• Have you noticed ice, water, an error display, or a change in sound?

Have the model, approximate age, prior service findings, and warranty documents ready if available. Describe recent changes to the home and your goal for the visit.

Compare the whole replacement project

List every component being replaced and every component retained. Ask why the proposed scope addresses the original problem, what site work it requires, and which warranties apply. When repair remains an option, get a separate repair assessment so you can compare timing, out-of-pocket cost, and remaining uncertainty.

What affects the price for this project?

Ask which indoor and outdoor components are included, whether the existing furnace/blower remains, and whether ducts, refrigerant lines, thermostat, electrical work, and removal are included. Compare the matched system and site work, not the outdoor-unit price alone.

Temperaly does not set provider prices. Ask for the charge for the proposed scope and a written explanation of exclusions. A useful quote separates required work from optional improvements so you can compare offers for the same result.

An example of a question worth resolving

One upstairs bedroom stays warm while the rest of the home cools normally. Ask for the room’s airflow and distribution to be assessed before accepting a whole-system replacement recommendation.

Use the example to frame your questions, not to diagnose your home. Ask the provider what evidence supports their recommendation and how they will verify the result.

Choose your next step

Review the scope, price, timing, and warranty before authorizing work. Start a air conditioning replacement request with your service city and state and what you need help with. A request does not reserve an appointment.

For a broader equipment decision, read repair versus replacement. For a current loss of comfort, see AC not cooling or no heat.