How to Prepare Your HVAC System for the Season

Start before you need it

The best time to think about your HVAC system is before the first heat wave or cold snap, not during one. Equipment that hasn't run in months can reveal small issues — a weak capacitor, a dusty filter, a clogged drain line — that are far easier to address on a mild afternoon than during peak-season demand.

A simple homeowner checklist

• Replace or clean the air filter — a clogged filter is one of the most common, most preventable sources of reduced performance
• Clear debris, leaves, and vegetation from around the outdoor condenser unit
• Test the thermostat and replace batteries if it's a battery-powered model
• Listen for unusual sounds during the first run of the season
• Check that vents throughout the home are open and unobstructed

When to bring in a professional

Anything beyond the filter and a visual check — refrigerant levels, electrical components, heat exchanger condition — is worth having a qualified provider look at. A seasonal tune-up is generally far less disruptive than an unplanned breakdown mid-season.

Timing it right

Scheduling maintenance a few weeks ahead of the season, rather than the week temperatures shift, generally means more scheduling flexibility and less pressure if something does need attention.