Replacing or repairing heating and cooling equipment is one of the biggest home-service expenses. These questions help you evaluate whether a tech is diagnosing carefully — or just pushing the highest-margin sale.
Why it matters: Handling refrigerants legally requires EPA certification. Company licensing (where required) and tech credentials are baseline filters before you discuss equipment.
Why it matters: Oversized and undersized systems waste energy and fail early. A real load calculation (not a rule of thumb based on square footage alone) shows they design for your house, not a catalog default.
Why it matters: Honest techs can explain remaining life, repair cost vs. unit age, and refrigerant phase-outs. Pressure to replace immediately without options is a warning sign.
Why it matters: Efficiency ratings affect monthly bills and eligibility for utility rebates or tax credits. Ask for estimated operating-cost differences, not just the sticker price of the unit.
Why it matters: Manufacturer warranties often require registered installation by a qualified contractor. Clarify labor warranty length separately from the parts warranty.
Why it matters: Some warranties require annual maintenance. Understand filter changes, coil cleaning, what “tune-up” actually covers, and whether declining a plan voids labor coverage.
Why it matters: Duct redesign, new breakers, or condensate drains can add cost and days. Get those line items upfront so the “cheap” unit quote doesn’t explode mid-job.
Why it matters: Many jurisdictions require permits for system replacement. Skipping inspection can create problems at resale and may void insurance coverage after a related claim.
Why it matters: Commissioning matters. Ask how they measure airflow, refrigerant charge, and what remediation they offer if rooms stay uncomfortable after the job.
Why it matters: Model numbers lock in what you are buying. Disposal fees, thermostat upgrades, and surge protection should not appear as surprises on the final invoice.