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This furnace is equipped with an ignition control factory enabled for use with Lennox A2L refrigerant systems. Disabling the refrigerant detection functionality on A2L system is prohibited by safety codes. Refer to furnace installation instructions for non-A2L and non-Lennox refrigerant system setup.. Download 1457 Lennox Furnace PDF manuals. User manuals, Lennox Furnace Operating guides and Service manuals.
