How often should HVAC systems be serviced?

Biannual service is standard: cooling tune-up in spring (March–May) and heating tune-up in fall (September–October). This timing catches problems before peak seasons when contractors are busiest.

What air filter should I use?

MERV 8–11 filters balance particle capture with airflow. MERV 13–16 captures more particles but restricts airflow — only use if your manufacturer approves. Replace every 30 days for 1-inch filters, 3–6 months for 4-inch filters.

What happens if I skip annual maintenance?

Increased failure risk, higher energy costs (dirty coils reduce efficiency 15–20%), potential warranty void, and shorter system life. The $150–$200 annual tune-up cost is almost always recovered in energy savings and avoided repairs.

Can I do my own HVAC maintenance?

Homeowners can handle filter changes, outdoor unit cleaning, condensate drain maintenance, and thermostat checks. Refrigerant handling, electrical testing, heat exchanger inspection, and combustion analysis require licensed technicians.

HVAC Maintenance & Tune-Up — Find Trusted HVAC Services Professionals

What Is HVAC Maintenance & Tune-Up?

Regular HVAC maintenance prevents the majority of system failures, extends equipment life, maintains warranty compliance, and keeps energy costs in check.

What a Professional Tune-Up Includes

AC tune-up: refrigerant pressure check, electrical component inspection, coil cleaning (evaporator and condenser), condensate drain flush, blower inspection, airflow measurement, thermostat calibration. Furnace tune-up adds: heat exchanger inspection, burner cleaning and adjustment, gas pressure verification, flue venting inspection, safety control testing.

Maintenance Plans: Are They Worth It?

Annual plans typically run $150–$350/year and often include priority emergency scheduling, repair discounts, and automatic reminders. For homeowners with older systems, priority scheduling alone — avoiding week-long waits in peak summer heat — often justifies the cost.

DIY Maintenance Between Professional Visits

Replace air filters every 1–3 months (the single most impactful DIY task). Keep the outdoor unit clear of debris with 2 feet of clearance. Flush condensate drain lines monthly with diluted bleach in summer. Verify thermostat operation. A clogged filter causes more HVAC failures than any other single factor.

Maintenance and Warranty Compliance

Most manufacturers require annual professional maintenance to maintain equipment warranty. Keep records of all service visits including technician name, date, and work performed. Warranty claims without maintenance records may be denied.

What to Look for in a HVAC Provider

State HVAC contractor license (required in most states) and EPA 608 certification for refrigerant handling
NATE (North American Technician Excellence) certification — the industry's highest technical standard
Experience with your specific equipment brand (ask about their top manufacturer relationships)
Transparent flat-rate or hourly pricing disclosed before the technician arrives
Manufacturer-authorized for warranty repairs on your brand
Maintenance plan options that include priority emergency scheduling

Professional HVAC Maintenance & Tune-Up