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Whistling typically indicates air leakage around the filter access panel
Common Questions: What does the "Speed Up" jumper do
allowing for safe localized maintenance without depressurizing the entire fuel line
Key Benefits Optimized Superheat Control: Precision-engineered to maintain a constant superheat at the evaporator outlet
and a pressure regulator into one compact housing
Lennox 71L45 Gasket 321702-401 Whistling typically indicates air leakageThe Lennox 71L45 is a critical Flue Collector Box Gasket designed to maintain the structural integrity of the combustion path in high efficiency furnace repair applications. This high temperature sealing component is engineered to eliminate exhaust gas bypass by creating a gas tight seal between the flue collector box and the heat exchanger interface. For technicians, ensuring a zero leak seal is essential to prevent CO leakage and maintain proper