DIY AC Maintenance Checklist

Simple seasonal tasks to prevent $1,000+ breakdowns and keep your AC running efficiently

Why Regular Maintenance Matters

Most expensive AC failures are preventable with basic maintenance. Spending 30 minutes twice a year can save you thousands in repairs.

  • Prevent breakdowns: 80% of AC failures are maintenance-related
  • Lower energy bills: Dirty systems use 15-20% more electricity
  • Extend lifespan: Well-maintained ACs last 15-20 years vs 8-12

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Spring Checklist (Before Summer)

  1. 1

    Replace Air Filter

    Check monthly, replace every 1-3 months. Dirty filters cause 80% of AC problems.

  2. 2

    Clean Outdoor Unit

    Turn off power. Spray condenser coils gently from inside-out with garden hose. Remove debris.

  3. 3

    Clear Drain Line

    Pour 1 cup vinegar down drain line to prevent clogs. Prevents water damage.

  4. 4

    Inspect Insulation

    Check refrigerant line insulation for cracks. Replace if damaged ($5-10 at hardware store).

  5. 5

    Test System

    Turn on AC, let run 10 minutes. Check for proper cooling and unusual noises.

Monthly Tasks (During Summer)

  • Change filter - Every 30 days during heavy use
  • Check thermostat - Ensure it's reading correctly
  • Clear vegetation - Keep 2 feet clearance around outdoor unit

Fall Checklist (End of Season)

  1. Final filter change
  2. Cover outdoor unit (optional, helps in snowy climates)
  3. Schedule professional tune-up every 2-3 years ($100-200)

Pro Maintenance ($100-200) vs DIY

DIY maintenance covers 80% of what matters. Professional tune-ups every 2-3 years catch the remaining 20%.

Skip annual pro maintenance if: Your AC is under 5 years old and you do the DIY tasks above religiously.

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