Key Topics Covered:

• Float switch wiring: series vs parallel configurations and why it matters
• Water damage prevention in horizontal and vertical HVAC applications
• Unit leveling and proper drain pan pitch
• Diagnosing wet air handlers: frozen coils, high static pressure, cracked pans
• Standing water test for leak detection
• Drain clearing methods: vacuum, water hose, and snake techniques
• Identifying roof leaks vs drain problems
• Condensation issues on platforms and panels
• Proper insulation and sealing techniques

Critical Safety Points:

• Why drains are the #1 callback issue
• Testing float switches during maintenance
• Documentation best practices
• When to use nitrogen vs water for clearing drains