Lennox 51W04 is an OEM 2-Stage Night Service Kit designed for Lennox SL280 furnaces, revisions -01 and -02. This factory-approved kit supports proper two-stage operation during night service mode, helping maintain reliable heating performance and system efficiency. Ideal for service replacements and professional HVAC repairs.
Lennox 51W04 is a genuine OEM 2-Stage Night Service Kit engineered specifically for use with Lennox SL280 gas furnaces, revisions -01 and -02. This factory-approved service kit is designed to support correct two-stage furnace operation during night service conditions, ensuring stable performance, proper staging behavior, and dependable heating output.
This kit is commonly used during professional service and maintenance to restore or maintain correct system functionality on compatible SL280 furnace models. Manufactured to original Lennox specifications, the 51W04 kit ensures proper fitment, long-term reliability, and full compatibility with the furnace control logic designed for two-stage operation.
Designed for HVAC technicians and service professionals, this OEM replacement helps minimize downtime, supports accurate diagnostics, and maintains manufacturer-intended performance. Using genuine Lennox parts like the 51W04 Night Service Kit helps protect system efficiency, operational safety, and overall equipment lifespan.
Product details:
Brand: Lennox Catalog number: 51W04 Part number: 51W04 Product type: 2-Stage Night Service Kit Application: Gas furnace service and maintenance Compatibility: Lennox SL280 furnaces Revisions supported: -01 and -02 OEM replacement part
This Lennox 51W04 2-Stage Night Service Kit is ideal for restoring proper staging operation on SL280 furnaces and is recommended for professional HVAC repair and maintenance where factory-correct performance is required.
