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For contractors performing furnace maintenance or troubleshooting no-heat calls
preventing overheating and premature wear of internal components
ensuring drop-in replacement without field modifications
Key Benefits: Closed-Circuit Diagnostics: Enables live millivolt output measurement under load without disconnecting source leads
Lennox 64L81 Air Flapper 30067439-890 For contractors performing furnace maintenanceThe Lennox 64L81 Air Flapper Kit (LB 98453B) represents a critical component for maintaining the combustion integrity of legacy Lennox Pulse series furnaces. This genuine OEM replacement kit, containing 10 individual 3 5 8" OD diaphragms, is engineered to handle the unique pressure dynamics of Lennox G14 and G21 units. As a veteran grade air diaphragm kit, these flappers regulate airflow within the combustion chamber, opening and closing in rapid
US$ 350.00
US$ 360.00
US$ 27.95