Why HVAC maintenance matters
Although it’s a little less glamorous on the surface, your HVAC system is a lot like your car— it works hard every day and needs regular checkups to stay in peak condition. Neglecting furnace maintenance can lead to costly repairs, poor performance, and even system failure. Here’s why keeping up with HVAC maintenance is a must:
Energy efficiency
A clean and well-maintained system doesn’t have to work as hard to keep you comfortable. The average home spends $1,900 on energy bills annually, with half of that going to heating costs. Routine maintenance of your HVAC system greatly improves efficiency, saving you money on energy bills.
Extended system lifespan
Want to avoid the headache (and expense) of replacing your HVAC system prematurely? A typical system has a lifespan of 10-15 years. Regular care keeps your system in excellent condition longer, helping you stay on the upper end of that stretch.
Improved air quality
Dust, dirt, and allergens can build up in your system over time, circulating through your home and affecting your air quality. Maintenance keeps the air you breathe cleaner and healthier.
Preventative savings
Many HVAC breakdowns are preventable with regular maintenance. The potential cost to repair or replace your heating system could be up to $5,600, while repairing or replacing your AC system could be up to $6,000. Spending a little time (or money) now on upkeep can save you thousands in unexpected repair bills down the line.*
*Repair/replacement cost is the eightieth percentile as reported in a nationwide survey of homeowners conducted in 2024 by CleaerVantage for American Home Shield.
Peace of mind
There’s nothing worse than your AC quitting on the hottest day of summer or your furnace failing in the middle of a blizzard. Regular furnace maintenance reduces the chances of these stressful, inconvenient breakdowns.
Monthly and seasonal maintenance checklists
Regular maintenance is the key to a long-lasting, efficient HVAC system. Follow this checklist to stay on top of monthly and seasonal tasks.
Essential tools for DIY HVAC maintenance
To keep your HVAC system in tip-top shape, you’ll need a few basic tools. These will make your DIY AC maintenance tasks quicker, easier, and more effective:
- Screwdriver set (5/16" and a 1/4" nut driver)
- Coil cleaning spray
- Soft brush or vacuum attachment (Wet/dry Shop Vac)
- Fin comb
- Garden hose
- Flashlight
Monthly Tasks
When your system seems to be chugging along smoothly, you’re not always worried about maintenance. But there’s a few tasks you should try to do every month:
Inspect and replace air filters:
- Check your air filters for dirt and debris.
- Replace them if they look clogged or dirty. Aim to do this every 1–3 months depending on your system’s usage.
Clean vents and registers:
- Use a vacuum or a soft brush to remove dust and dirt from the air vents.
- Make sure air registers are open and not obstructed by furniture or other objects.
Spring start-up checklist:
As the weather starts heating up, here’s how to approach booting up:
Turn off power:
- Always start by turning off the power to your system at the main switch or breaker box.
Clean the outdoor AC unit:
- Remove leaves, dirt, or any debris from around the outdoor unit to ensure proper airflow.
- Use a garden hose (on a low setting) to rinse off coils top to bottom at a downward angle.
Clear and clean coils:
- Rinse the condenser coils with a water hose and remove dirt or dust build-up.
- Use coil cleaning spray if necessary to help loosen debris.
Check condensate drain line for clogs:
- Check the condensate drain line to ensure water flows freely.
- If you notice clogs, use a wet/dry vacuum to clean the line.
Change dirty filters:
- Replace any dirty or old filters with new ones to maintain proper airflow and air quality.
Vacuum blower motor:
- Carefully vacuum around the blower motor to remove dust and debris that could affect airflow.
Inspect ductwork:
- Check ducts for leaks, cracks, or loose connections. Repair any leaks with duct tape or sealant.
Test the thermostat:
- Set the thermostat to your desired temperature and verify the system kicks on correctly.
- Ensure the thermostat reads the correct temperature to avoid uneven cooling.
Summer AC maintenance tips:
You need your AC to work hard in the summer. Here’s how to maximize its success:
Monitor system performance:
- Check for uneven cooling, particularly in rooms far from the unit, or if certain areas feel warmer than others.
- Listen for unusual noises, such as buzzing, rattling, or humming, which could indicate a problem.
Adjust thermostat settings for efficiency:
- When you’re away from home, raise the temperature to 78°F for cooling to save energy without sacrificing comfort.
Fall shutdown checklist:
As you begin the switch from cooling to heating systems, keep a few checks in mind:
Clean and cover the outdoor unit:
- Clean the outdoor unit thoroughly, removing any debris from the surrounding area.
- Consider covering the unit with a protective cover to prevent leaves and dirt fromentering during the off-season.
Check refrigerant levels:
- Verify that the refrigerant levels are adequate (if you have an EPA refrigerant license; otherwise, call a professional).
- Low refrigerant levels can indicate leaks that need to be addressed by a professional.
Inspect furnace or heat pump:
- Check the furnace or heat pump for signs of wear and tear.
- Look for signs of rust, damage, or loose components that might require attention.
Clean burners and replace filters:
- Clean the burners in your furnace and replace any filters that are dirty or clogged.
Winter furnace maintenance tips:
Winter is coming, and it’s time to prep your heating system to face the chill:
Test heating system early:
- Turn your heating system on before the first cold snap to ensure it’s working properly. This will help avoid a chilly surprise on the coldest days.
Clean vents for obstructions:
- Remove any blockages or obstructions from your heating vents to maintain proper airflow.
Inspect carbon monoxide detectors:
- Test your carbon monoxide detectors to ensure they’re working and replace batteries if needed. A properly functioning carbon monoxide detector is essential for safety during the colder months.
Additional reading:
How to Conduct DIY HVAC Inspection
How to Clean Your Air Conditioner Condensate Drain Line
