DECISION GUIDE · REVIEWED NOVEMBER 2, 2026

Repair or replace? Ask for evidence before deciding.

Educational planning guidance. Not a remote diagnosis, emergency service or engineering assessment.

Age is context, not a diagnosis.

An older system can deserve a closer economic and condition review. Age alone does not tell you the fault, repairability, remaining life or actual savings from a new system.

Compare two written paths.

Ask for an itemized repair scope, what that repair addresses, and the complete replacement scope. Record exclusions, parts and labor warranty, permit handling and commissioning. Do not infer remaining equipment life from a generic rule.

Check what replacement would actually change.

Request the exact matched system and a sizing method based on the home. A more efficient rating is not a guarantee of lower household bills if installation, ducts, usage or the comparison assumptions differ.

Keep the calculation separate from the sales story.

Use verified same-basis efficiency ratings and your own electricity information to test a cooling-cost scenario. Factor in incremental cost, timing and uncertainty. Heating and fuel-switching need a separate model.

Keep reading

AC running but not cooling? Start with a better next step. · Two HVAC quotes: are they actually the same job? · Understand a heat pump’s running costs before you compare. · Why is one room always warmer? Start with the distribution.