What's included in an HVAC tune-up?

Cooling-season tune-up tasks

• ✓Inspect and clean the outdoor condenser coil and indoor evaporator coil
• ✓Verify refrigerant charge and check for signs of leaks
• ✓Test capacitors, contactors, and electrical connections
• ✓Flush and treat the condensate drain to prevent water backups
• ✓Measure temperature drop across the coil to confirm cooling performance

Heating-season tune-up tasks

On furnaces and boilers, a fall tune-up centers on safe combustion: inspecting the heat exchanger for cracks, cleaning burners, testing the ignitor or pilot assembly, checking flue venting and draft, and verifying that limit switches and other safety controls shut the system down when they should. Heat exchanger inspection matters most, because a cracked exchanger can allow carbon monoxide into the home — one of the strongest reasons annual heating maintenance is a safety task, not just a performance one.

Why regular maintenance pays off

Dirty coils, weak capacitors, and clogged drains rarely fail on mild days; they fail during heat waves and cold snaps when the system runs hardest. Routine maintenance restores lost efficiency, reduces the odds of an emergency call, helps equipment reach its full expected lifespan, and is often required to keep manufacturer warranties valid. The technician's notes also create a running health record for the system, so you can plan for replacement on your schedule instead of the equipment's.

What you can do between visits

Homeowners can replace filters on schedule, keep the outdoor unit clear of leaves and grass clippings, and listen for new rattles or grinding sounds. Everything involving gas, refrigerant, or high-voltage components belongs to a trained technician. PJ MAC HVAC performs maintenance and tune-ups on all major brands, with 24/7 availability if something turns up urgent.