HVAC Inspection: What to Expect

What's Included in an HVAC Inspection

A thorough HVAC inspection covers both your heating and cooling systems. Here's what a qualified technician should check:

• Air filter: Inspect and replace if needed
• Thermostat: Test calibration and operation
• Electrical connections: Check and tighten all connections, measure voltage and current
• Lubricate moving parts: Motors, bearings, and other components
• Condensate drain: Clear blockages, check for algae growth
• Evaporator and condenser coils: Inspect for dirt, damage, and proper refrigerant levels
• Blower components: Inspect and clean blower wheel and housing
• Heat exchanger: Check for cracks that could cause carbon monoxide leaks
• Burners and ignition: Inspect for proper operation (gas systems)
• Ductwork: Visual inspection for leaks, gaps, and obvious damage
• Refrigerant level: Check for proper charge (AC systems)

When Should You Schedule an Inspection?

Most HVAC professionals recommend scheduling two inspections per year: one in spring before cooling season begins, and one in fall before heating season. At minimum, annual inspections are essential. Key times to schedule an unplanned inspection:

• After purchasing a new home
• If your energy bills have increased significantly
• If the system is making unusual noises
• If some rooms are harder to heat or cool than others
• If the system is 8+ years old (problems increase with age)

Inspection vs. Tune-Up: What's the Difference?

An inspection is primarily diagnostic — the technician assesses your system and reports what they find. A tune-up includes the inspection plus active maintenance work like cleaning coils, lubricating parts, and clearing drains. Most contractors offer combined inspection/tune-up packages for $150–$300.

After the Inspection

A quality contractor will provide you with a written report detailing everything that was checked, any issues found, and recommendations. Be cautious of contractors who "find" major problems on every visit — get a second opinion if repairs seem unusually expensive.

If the inspection reveals dirty ductwork, consider scheduling air duct cleaning at the same visit to save on service fees.