🔧 Monthly Tasks ☐ Filter Inspection ☐ Airflow Check ☐ Drain System 🔩 Quarterly Tasks ☐ Coil Maintenance ☐ Mechanical Components ☐ Control Test 📆 Annual Tasks ☐ Water System Service ☐ Electrical Safety ☐ Ductwork Audit 🚨 Troubleshooting Quick Reference Symptom First Thing to Check No airflow Filter, then circuit breaker Water leaking Drain