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Reference the "Air Tube Combination Code" on your existing burner's nameplate
facilitating fast swap-outs during service calls
The unit operates on a 24 VAC/VDC supply voltage and features jumper-selectable 0-20 mA or 0-15 VDC input signals
the 8408-048BX is the identical OEM replacement for the standard 8408-048 model
Lennox 25J38 Fan Relay 328140-751 Reference the "Air Tube CombinationAs a core component for indoor blower control, the Lennox 25J38 Fan Relay is a heavy duty 24V SPDT (Single Pole Double Throw) switch designed for high reliability switching in Lennox furnaces and air handlers. Professionals know that when a blower motor relay fails, it typically leads to a "no air" condition or a fan that runs continuously, potentially straining the motor windings. This OEM Lennox 25038 replacement features a 25A contact rating at 50
