The Goodman 2 Ton R-32 Compatible Wall-Mounted Air Handler (Model AWST24SU1308) is designed for reliable, efficient comfort. But even the best equipment can lose performance without proper maintenance.
Dirty filters, clogged drain lines, or neglected coils can make your system work harder, drive up your energy bills, and shorten its lifespan.
Mark, a DIY-inclined homeowner, puts it this way:
“I used to think HVAC systems just ran until they broke. After my first air handler burned out from a dirty coil, I learned—maintenance isn’t optional. It’s the secret to keeping your system efficient and trouble-free.”
In this guide, we’ll walk you through seasonal maintenance tips to keep your Goodman wall-mounted air handler efficient year-round.
🌀 Why Maintenance Matters
Energy Efficiency
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A dirty filter or coil can cut airflow and efficiency by 5–15%, according to Energy Star (Energy Star Guide).
Comfort
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Restricted airflow means uneven heating/cooling and higher humidity indoors.
Reliability
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Preventive care reduces breakdowns and emergency repair costs.
Longevity
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Systems with regular maintenance last years longer than neglected ones.
👉 The DOE recommends professional servicing once per year to keep HVAC systems operating at peak performance (DOE Energy Saver).
🧹 Step 1: Replace or Clean Filters
Filters are your first line of defense against dust, dirt, and allergens.
How often?
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Disposable filters: Every 1–3 months.
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Reusable/washable filters: Wash monthly, let dry completely before reinstalling.
Why it matters:
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Dirty filters block airflow.
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The blower motor works harder, raising energy costs.
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Poor air quality affects health and comfort.
👉 The EPA emphasizes that filter maintenance is one of the simplest and most effective ways to improve HVAC efficiency (EPA Indoor Air Quality).
Mark’s tip:
“I set a calendar reminder on my phone every 60 days. Cheap insurance for an expensive system.”
🌀 Step 2: Keep the Coil Clean
The evaporator coil inside your air handler absorbs heat. Dirt buildup reduces its ability to transfer heat, making the system inefficient.
How to clean:
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Turn off power.
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Remove access panel.
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Inspect coil for dust or grime.
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Use a soft brush or coil cleaner spray.
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Rinse carefully if required.
👉 The ACCA notes that coil cleaning is vital for maintaining performance and preventing system freeze-ups
Mark’s experience:
“I skipped cleaning for two years, and my coil literally iced over. The repair cost more than the maintenance would have.”
💧 Step 3: Check and Clear the Drain Line
Your air handler produces condensation as it cools air. The drain line carries this water away. If clogged, it can cause leaks, mold, or even system shutdown.
How to maintain:
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Flush the line with vinegar or mild cleaning solution once or twice a year.
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Ensure the line slopes at least ¼ inch per foot.
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Install a safety float switch if in an attic or crawlspace.
👉 The EPA and Energy Star both stress proper condensate management to prevent costly water damage (Energy Star HVAC Guide).
🔧 Step 4: Inspect Electrical Connections
Loose wires or worn terminals can cause inefficiency or hazards.
Homeowner checklist:
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Look for discolored wires or burnt smells.
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Ensure the disconnect box is accessible.
Pro technician tasks:
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Tighten connections.
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Check amperage draw.
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Test safety controls.
👉 The Building Performance Institute (BPI) highlights that electrical inspection is a key step in professional HVAC maintenance (BPI Resources).
🛠️ Step 5: Seasonal Pro Maintenance
Even diligent DIYers like Mark call in a pro annually.
What pros check:
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Refrigerant charge (R-32 or R-410A, depending on condenser).
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Blower motor performance.
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TXV operation.
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Heater kit (if installed).
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Ductwork and static pressure.
👉 The AHRI recommends matched system checks to maintain efficiency and warranty compliance (AHRI Directory).
Mark’s view:
“I’ll change filters and clean drains all day, but refrigerant charging? That’s pro territory.”
🏠 Seasonal Maintenance Checklist (Mark’s Routine)
🌱 Spring
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Change filter.
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Clean coil.
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Flush drain line.
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Run system test.
☀️ Summer
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Check insulation on refrigerant lines.
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Inspect for water leaks.
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Ensure airflow at vents.
🍂 Fall
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Replace filter.
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Check electrical connections.
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Test optional 8 kW heater kit.
❄️ Winter
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Run system monthly (prevents stuck parts).
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Check drain pans in attics/crawlspaces.
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Keep area around unit clear.
🪟 Common Mistakes to Avoid
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Skipping filters: Biggest cause of inefficiency.
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Blocking airflow: Don’t store boxes or clutter near the air handler.
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Ignoring water leaks: Small leaks can mean big problems.
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DIY refrigerant charging: Requires EPA Section 608 certification (EPA Section 608).
Mark admits:
“When I was younger, I thought I could ‘top off’ refrigerant myself. Nope. Not only is it illegal without certification—it’s easy to ruin your system.”
💲 Cost of Maintenance vs. Repairs
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Filter: $10–$30 every 2–3 months.
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Coil cleaner: $15–$25 annually.
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Drain line flush: Free (vinegar) to $10.
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Annual pro tune-up: $100–$200.
Compare that to:
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Coil replacement: $800–$1,500.
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Blower motor replacement: $600–$1,000.
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Full system replacement: $4,000+.
👉 Maintenance pays for itself many times over.
📊 Infographic Idea
“Seasonal Maintenance Checklist for Your Goodman Wall-Mounted Air Handler”
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Spring 🌱: Filters, coil, drain line
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Summer ☀️: Airflow, leaks, insulation
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Fall 🍂: Electrical check, heater kit
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Winter ❄️: Monthly run, drain pan check
💡 Mark’s Final Takeaway
Mark sums it up simply:
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“HVAC is like a car—you don’t just drive it until it dies. You change the oil, rotate the tires, and it lasts longer. Same with your air handler. Keep it clean, check it seasonally, and get a pro tune-up once a year. Do that, and your Goodman system will pay you back in comfort and lower bills.”
The Goodman AWST24SU1308 is efficient by design, but with the right maintenance, it can stay that way for 10–15 years or more.
In the next topic we will know more about: Troubleshooting Guide: What to Do If Your Goodman Air Handler Isn’t Heating or Cooling Properly
