Maintenance & PM

Cooling and heating preventive-maintenance tasks — what to actually check, why it matters, and seasonal prep that prevents callbacks.

4 guides

• Cooling-Season PM: The Task List and the Why Behind Each
  A field-ordered cooling-season preventive-maintenance task list for a residential split system, with the reason behind each step so you're catching failures early instead of just wiping down a condenser.
• Heat-Pump PM: What's Different From a Straight-Cool Tune-Up
  How heat-pump preventive maintenance differs from an AC-only PM — defrost and reversing-valve checks, auxiliary-heat verification, both-coil cleaning, and why a heat pump really wants attention going into both seasons.
• Heating-Season PM on a Gas Furnace: Tasks and the Why
  A field-ordered fall maintenance task list for a residential gas furnace — combustion, ignition, the heat exchanger, safeties, and airflow — with the reasoning behind each step and the safety items you never skip.
• What a Real Maintenance Actually Checks (Not a Filter Swap)
  The difference between a real, measurement-based preventive maintenance and a wipe-and-sticker visit — what genuinely predicts failures, why measurement matters more than cleaning alone, and how to deliver PM value honestly.

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