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What’s Included in a Seasonal HVAC Maintenance Visit (And Why It Matters) 

Home | Blog | Published on February 23rd, 2026

Your heating and cooling system works hard year-round to keep your home comfortable. Whether it’s battling summer heat or winter chill, your HVAC system is one of the most important and expensive components in your home. That’s why seasonal maintenance by a trained professional HVAC technician isn’t just recommended; it’s essential.

But what actually happens during a seasonal HVAC maintenance visit? And why does it matter so much Here’s what you can expect.

1. Thorough System Inspection

Every maintenance visit begins with a comprehensive inspection of your system. A licensed HVAC technician will examine both the indoor and outdoor components, checking for visible wear, corrosion, loose connections, and any early signs of failure.

This includes inspecting the blower motor, condenser unit, evaporator coil, refrigerant lines, electrical connections, and safety controls. Catching small issues early prevents them from turning into major (and costly) breakdowns later.

2. Cleaning of Critical Components

Dirt and debris are among the biggest enemies of HVAC efficiency. During a seasonal visit, your technician will clean key components such as:

  • Condenser coils
  • Evaporator coils (as accessible)
  • Blower components
  • Drain lines

Dirty coils force your system to work harder, increasing energy consumption and shortening equipment life. Cleaning improves airflow, boosts efficiency, and helps maintain consistent comfort throughout your home.

3. Air Filter Review and Replacement

A clogged air filter restricts airflow and puts unnecessary strain on your system. During maintenance, the technician will inspect your air filter and replace it if needed (or advise you if it’s a specialty filter).

Clean filters improve indoor air quality, reduce allergens, and keep your system running efficiently.

4. Refrigerant Level Check

If it’s a spring or summer visit, the technician will check refrigerant levels and inspect for leaks. Low refrigerant can reduce cooling capacity, increase operating costs, and damage the compressor, one of the most expensive components to replace.

Ensuring proper refrigerant charge keeps your system cooling effectively and prevents long-term damage.

5. Electrical Testing

Your HVAC system relies on multiple electrical components to operate safely. During maintenance, the technician will:

  • Tighten electrical connections
  • Measure voltage and current
  • Inspect capacitors and contactors
  • Test safety controls

Loose or failing electrical components are common causes of unexpected breakdowns. Addressing them proactively improves reliability and reduces fire risk.

6. Thermostat Calibration

An improperly calibrated thermostat can cause uneven temperatures and higher energy bills. Your technician will verify accurate readings, test system response, and ensure your thermostat communicates properly with your HVAC equipment.

If you have a smart thermostat, they may also confirm settings are optimized for seasonal efficiency.

7. System Performance Testing

Finally, the technician will run the system through a full operational cycle. They’ll measure airflow, temperature split, and overall performance to confirm everything is functioning as designed.

This step ensures your system is ready to handle the demands of the upcoming season.

Why Seasonal Maintenance Matters

By scheduling professional maintenance twice a year, once before cooling season and once before heating season, you protect your investment and ensure year-round comfort.

A well-maintained HVAC system doesn’t just perform better. It lasts longer, runs safer, and saves you money over time.

Contact Tom Schaefer Plumbing, Heating & Cooling for the Trusted Name, Reliable Service.

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