Mondragon Mechanical LLC

Yes. In Texas, air conditioning and refrigeration contractors and their technicians should be registered or licensed through the state regulatory authority (check the Texas Department of Licensing and Regulation/TDLR), and anyone who handles refrigerant must have federal EPA Section 608 certification. You should also confirm the contractor carries general liability insurance and, if they have employees, workers’ compensation. Because local rules apply, ask whether the contractor will pull required permits for replacements or major work in the City of Dallas and request their license/registration number so you can verify it with the state.

A proper answer requires a professional load calculation (Manual J) that accounts for your home’s square footage, insulation, windows, attic condition, orientation, and typical Dallas heat and humidity. Don’t rely on a contractor who simply upsizes based on tonnage — oversized units short-cycle and reduce comfort and efficiency. Discuss SEER ratings (higher SEER = better efficiency, useful in a hot Texas climate), compatible refrigerants (most new systems use R‑410A or newer low‑GWP refrigerants since R‑22 is phased out), and make sure the contractor provides a written proposal that shows equipment capacity, estimated efficiency, and expected energy impacts.

In hot, humid Dallas weather, annual or biannual tune‑ups are recommended (typically a pre‑summer check of the outdoor unit, coils, refrigerant level, electrical connections, and airflow). Regular filter changes (often monthly to every three months depending on filter type and household conditions) help maintain efficiency and indoor air quality. Ask prospective contractors about preventive maintenance plans, what their tune‑ups include, whether they provide written reports, and their emergency response policy (after‑hours availability and typical response times) so you’re prepared during peak summer failures.