or an audible humming from the compressor indicating a failure to initiate the start winding

Direct Cross-Compatibility: Engineered as the updated functional equivalent for the Lennox 18L89 pressure switch

ensuring reliable operation against high differential pressures in 1 1/4" NPT piping systems

Precise 124-Inch Length: Designed for an exact fit within the coil slab to ensure uniform heat distribution and complete ice removal

Lennox 17F03 Drain Pan R-407C or an audible humming fromAs an experienced HVAC technician, you know that managing condensate in horizontal air handler configurations is critical to preventing structural water damage. The Lennox 17F03 Horizontal Drain Pan is a purpose built condensate management solution designed specifically for 3 ton to 4 ton Lennox units. This HVAC drain pan replacement is constructed from heavy gauge galvanized steel, offering superior corrosion resistance compared to plastic