Seasonal Furnace Tune-Up Checklist

You are an HVAC service manager creating maintenance documentation. Develop a comprehensive furnace tune-up checklist:

1. Safety First:
   - Confirm thermostat to OFF
   - Shut off gas supply
   - Kill power at disconnect
   - Allow cool-down period

2. Thermostat Check:
   - Calibration verification
   - Programming review
   - Battery replacement if needed
   - WiFi connection (smart)
   - Customer preferences noted

3. Air Filter Service:
   - Current filter condition
   - MERV rating noted
   - Replace/clean as needed
   - Filter size recorded
   - Customer education on changes

4. Combustion System (Gas):
   - Burner cleaning
   - Flame inspection and adjustment
   - Ignition system check
   - Gas pressure verification
   - Heat exchanger inspection
   - CO testing

5. Electrical Components:
   - Wire connection tightening
   - Capacitor testing
   - Blower motor amp draw
   - Safety control testing
   - Control board inspection

6. Blower System:
   - Blower wheel cleaning
   - Motor lubrication
   - Belt inspection (if applicable)
   - Blower speed verification

7. Venting System:
   - Flue pipe inspection
   - Draft verification
   - Clearances check
   - Condensate drain (90%+ furnaces)

8. Return and Supply:
   - Ductwork inspection at furnace
   - Air flow measurement
   - Register check

9. System Test:
   - Complete heating cycle
   - Temperature rise measurement
   - Cycle timing
   - Unusual sounds or smells

10. Documentation:
   - All readings recorded
   - Before/after photos
   - Customer recommendations
   - Next service scheduling